freepascal.compiler/fv/views.pas

{********[ SOURCE FILE OF GRAPHICAL FREE VISION ]**********}
{                                                          }
{   System independent GRAPHICAL clone of VIEWS.PAS        }
{                                                          }
{   Interface Copyright (c) 1992 Borland International     }
{                                                          }
{   Copyright (c) 1996, 1997, 1998, 1999 by Leon de Boer   }
{   [email protected]  - primary e-mail address        }
{   [email protected] - backup e-mail address         }
{                                                          }
{****************[ THIS CODE IS FREEWARE ]*****************}
{                                                          }
{     This sourcecode is released for the purpose to       }
{   promote the pascal language on all platforms. You may  }
{   redistribute it and/or modify with the following       }
{   DISCLAIMER.                                            }
{                                                          }
{     This SOURCE CODE is distributed "AS IS" WITHOUT      }
{   WARRANTIES AS TO PERFORMANCE OF MERCHANTABILITY OR     }
{   ANY OTHER WARRANTIES WHETHER EXPRESSED OR IMPLIED.     }
{                                                          }
{*****************[ SUPPORTED PLATFORMS ]******************}
{                                                          }
{ Only Free Pascal Compiler supported                      }
{                                                          }
{**********************************************************}

UNIT Views;

{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
                                  INTERFACE
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}

{====Include file to sort compiler platform out =====================}
{$I Platform.inc}
{====================================================================}

{==== Compiler directives ===========================================}

{$X+} { Extended syntax is ok }
{$R-} { Disable range checking }
{$S-} { Disable Stack Checking }
{$I-} { Disable IO Checking }
{$Q-} { Disable Overflow Checking }
{$V-} { Turn off strict VAR strings }
{====================================================================}

USES
   {$IFDEF OS_WINDOWS}                                { WIN/NT CODE }
         Windows,                                     { Standard unit }
   {$ENDIF}

   {$IFDEF OS_OS2}                                    { OS2 CODE }
     Os2Def, DosCalls, PmWin,
   {$ENDIF}

   Objects, FVCommon, Drivers, fvconsts;              { GFV standard units }

{***************************************************************************}
{                              PUBLIC CONSTANTS                             }
{***************************************************************************}

{---------------------------------------------------------------------------}
{                              TView STATE MASKS                            }
{---------------------------------------------------------------------------}
CONST
   sfVisible   = $0001;                               { View visible mask }
   sfCursorVis = $0002;                               { Cursor visible }
   sfCursorIns = $0004;                               { Cursor insert mode }
   sfShadow    = $0008;                               { View has shadow }
   sfActive    = $0010;                               { View is active }
   sfSelected  = $0020;                               { View is selected }
   sfFocused   = $0040;                               { View is focused }
   sfDragging  = $0080;                               { View is dragging }
   sfDisabled  = $0100;                               { View is disabled }
   sfModal     = $0200;                               { View is modal }
   sfDefault   = $0400;                               { View is default }
   sfExposed   = $0800;                               { View is exposed }
   sfIconised  = $1000;                               { View is iconised }

{---------------------------------------------------------------------------}
{                             TView OPTION MASKS                            }
{---------------------------------------------------------------------------}
CONST
   ofSelectable  = $0001;                             { View selectable }
   ofTopSelect   = $0002;                             { Top selectable }
   ofFirstClick  = $0004;                             { First click react }
   ofFramed      = $0008;                             { View is framed }
   ofPreProcess  = $0010;                             { Pre processes }
   ofPostProcess = $0020;                             { Post processes }
   ofBuffered    = $0040;                             { View is buffered }
   ofTileable    = $0080;                             { View is tileable }
   ofCenterX     = $0100;                             { View centred on x }
   ofCenterY     = $0200;                             { View centred on y }
   ofCentered    = $0300;                             { View x,y centred }
   ofValidate    = $0400;                             { View validates }
   ofVersion     = $3000;                             { View TV version }
   ofVersion10   = $0000;                             { TV version 1 view }
   ofVersion20   = $1000;                             { TV version 2 view }

{---------------------------------------------------------------------------}
{                            TView GROW MODE MASKS                          }
{---------------------------------------------------------------------------}
CONST
   gfGrowLoX = $01;                                   { Left side grow }
   gfGrowLoY = $02;                                   { Top side grow  }
   gfGrowHiX = $04;                                   { Right side grow }
   gfGrowHiY = $08;                                   { Bottom side grow }
   gfGrowAll = $0F;                                   { Grow on all sides }
   gfGrowRel = $10;                                   { Grow relative }

{---------------------------------------------------------------------------}
{                           TView DRAG MODE MASKS                           }
{---------------------------------------------------------------------------}
CONST
   dmDragMove = $01;                                  { Move view }
   dmDragGrow = $02;                                  { Grow view }
   dmLimitLoX = $10;                                  { Limit left side }
   dmLimitLoY = $20;                                  { Limit top side }
   dmLimitHiX = $40;                                  { Limit right side }
   dmLimitHiY = $80;                                  { Limit bottom side }
   dmLimitAll = $F0;                                  { Limit all sides }

{---------------------------------------------------------------------------}
{                       >> NEW << TAB OPTION MASKS                          }
{---------------------------------------------------------------------------}
CONST
   tmTab      = $01;                                  { Tab move mask }
   tmShiftTab = $02;                                  { Shift+tab move mask }
   tmEnter    = $04;                                  { Enter move mask }
   tmLeft     = $08;                                  { Left arrow move mask }
   tmRight    = $10;                                  { Right arrow move mask }
   tmUp       = $20;                                  { Up arrow move mask }
   tmDown     = $40;                                  { Down arrow move mask }

{---------------------------------------------------------------------------}
{                        >> NEW << VIEW DRAW MASKS                          }
{---------------------------------------------------------------------------}
CONST
   vdBackGnd = $01;                                   { Draw backgound }
   vdInner   = $02;                                   { Draw inner detail }
   vdCursor  = $04;                                   { Draw cursor }
   vdBorder  = $08;                                   { Draw view border }
   vdFocus   = $10;                                   { Draw focus state }
   vdNoChild = $20;                                   { Draw no children }
   vdShadow  = $40;
   vdAll     = vdBackGnd + vdInner + vdCursor + vdBorder + vdFocus + vdShadow;

{---------------------------------------------------------------------------}
{                            TView HELP CONTEXTS                            }
{---------------------------------------------------------------------------}
CONST
   hcNoContext = 0;                                   { No view context }
   hcDragging  = 1;                                   { No drag context }

{---------------------------------------------------------------------------}
{                             TWindow FLAG MASKS                            }
{---------------------------------------------------------------------------}
CONST
   wfMove  = $01;                                     { Window can move }
   wfGrow  = $02;                                     { Window can grow }
   wfClose = $04;                                     { Window can close }
   wfZoom  = $08;                                     { Window can zoom }

{---------------------------------------------------------------------------}
{                              TWindow PALETTES                             }
{---------------------------------------------------------------------------}
CONST
   wpBlueWindow = 0;                                  { Blue palette }
   wpCyanWindow = 1;                                  { Cyan palette }
   wpGrayWindow = 2;                                  { Gray palette }

{---------------------------------------------------------------------------}
{                              COLOUR PALETTES                              }
{---------------------------------------------------------------------------}
CONST
   CFrame      = #1#1#2#2#3;                          { Frame palette }
   CScrollBar  = #4#5#5;                              { Scrollbar palette }
   CScroller   = #6#7;                                { Scroller palette }
   CListViewer = #26#26#27#28#29;                     { Listviewer palette }

   CBlueWindow = #8#9#10#11#12#13#14#15;              { Blue window palette }
   CCyanWindow = #16#17#18#19#20#21#22#23;            { Cyan window palette }
   CGrayWindow = #24#25#26#27#28#29#30#31;            { Grey window palette }

{---------------------------------------------------------------------------}
{                           TScrollBar PART CODES                           }
{---------------------------------------------------------------------------}
CONST
   sbLeftArrow  = 0;                                  { Left arrow part }
   sbRightArrow = 1;                                  { Right arrow part }
   sbPageLeft   = 2;                                  { Page left part }
   sbPageRight  = 3;                                  { Page right part }
   sbUpArrow    = 4;                                  { Up arrow part }
   sbDownArrow  = 5;                                  { Down arrow part }
   sbPageUp     = 6;                                  { Page up part }
   sbPageDown   = 7;                                  { Page down part }
   sbIndicator  = 8;                                  { Indicator part }

{---------------------------------------------------------------------------}
{              TScrollBar OPTIONS FOR TWindow.StandardScrollBar             }
{---------------------------------------------------------------------------}
CONST
   sbHorizontal     = $0000;                          { Horz scrollbar }
   sbVertical       = $0001;                          { Vert scrollbar }
   sbHandleKeyboard = $0002;                          { Handle keyboard }

{---------------------------------------------------------------------------}
{                            STANDARD COMMAND CODES                         }
{---------------------------------------------------------------------------}
CONST
   cmValid   = 0;                                     { Valid command }
   cmQuit    = 1;                                     { Quit command }
   cmError   = 2;                                     { Error command }
   cmMenu    = 3;                                     { Menu command }
   cmClose   = 4;                                     { Close command }
   cmZoom    = 5;                                     { Zoom command }
   cmResize  = 6;                                     { Resize command }
   cmNext    = 7;                                     { Next view command }
   cmPrev    = 8;                                     { Prev view command }
   cmHelp    = 9;                                     { Help command }
   cmOK      = 10;                                    { Okay command }
   cmCancel  = 11;                                    { Cancel command }
   cmYes     = 12;                                    { Yes command }
   cmNo      = 13;                                    { No command }
   cmDefault = 14;                                    { Default command }
   cmCut     = 20;                                    { Clipboard cut cmd }
   cmCopy    = 21;                                    { Clipboard copy cmd }
   cmPaste   = 22;                                    { Clipboard paste cmd }
   cmUndo    = 23;                                    { Clipboard undo cmd }
   cmClear   = 24;                                    { Clipboard clear cmd }
   cmTile    = 25;                                    { Tile subviews cmd }
   cmCascade = 26;                                    { Cascade subviews cmd }
   cmReceivedFocus     = 50;                          { Received focus }
   cmReleasedFocus     = 51;                          { Released focus }
   cmCommandSetChanged = 52;                          { Commands changed }
   cmScrollBarChanged  = 53;                          { Scrollbar changed }
   cmScrollBarClicked  = 54;                          { Scrollbar clicked on }
   cmSelectWindowNum   = 55;                          { Select window }
   cmListItemSelected  = 56;                          { Listview item select }

   cmNotify = 27;
   cmIdCommunicate     = 28;                          { Communicate via id }
   cmIdSelect          = 29;                          { Select via id }

{---------------------------------------------------------------------------}
{                          TWindow NUMBER CONSTANTS                         }
{---------------------------------------------------------------------------}
CONST
   wnNoNumber = 0;                                    { Window has no num }
   MaxViewWidth = 255;                                { Max view width }


{***************************************************************************}
{                          PUBLIC TYPE DEFINITIONS                          }
{***************************************************************************}

{---------------------------------------------------------------------------}
{                            TWindow Title string                           }
{---------------------------------------------------------------------------}
TYPE
   TTitleStr = String[80];                            { Window title string }

{---------------------------------------------------------------------------}
{                            COMMAND SET RECORD                             }
{---------------------------------------------------------------------------}
TYPE
   TCommandSet = SET OF Byte;                         { Command set record }
   PCommandSet = ^TCommandSet;                        { Ptr to command set }

{---------------------------------------------------------------------------}
{                              PALETTE RECORD                               }
{---------------------------------------------------------------------------}
TYPE
   TPalette = String;                                 { Palette record }
   PPalette = ^TPalette;                              { Pointer to palette }

{---------------------------------------------------------------------------}
{                            TDrawBuffer RECORD                             }
{---------------------------------------------------------------------------}
TYPE
   TDrawBuffer = Array [0..MaxViewWidth - 1] Of Word; { Draw buffer record }
   PDrawBuffer = ^TDrawBuffer;                        { Ptr to draw buffer }

{---------------------------------------------------------------------------}
{                           TVideoBuffer RECORD                             }
{---------------------------------------------------------------------------}
TYPE
   TVideoBuf = ARRAY [0..3999] of Word;               { Video buffer }
   PVideoBuf = ^TVideoBuf;                            { Pointer to buffer }

{---------------------------------------------------------------------------}
{                            TComplexArea RECORD                            }
{---------------------------------------------------------------------------}
TYPE
   PComplexArea = ^TComplexArea;                      { Complex area }
   TComplexArea =
{$ifndef FPC_REQUIRES_PROPER_ALIGNMENT}
   PACKED
{$endif FPC_REQUIRES_PROPER_ALIGNMENT}
   RECORD
      X1, Y1  : Sw_Integer;                              { Top left corner }
      X2, Y2  : Sw_Integer;                              { Lower right corner }
      NextArea: PComplexArea;                         { Next area pointer }
   END;

{***************************************************************************}
{                        PUBLIC OBJECT DEFINITIONS                          }
{***************************************************************************}

TYPE
   PGroup = ^TGroup;                                  { Pointer to group }

{---------------------------------------------------------------------------}
{                    TView OBJECT - ANCESTOR VIEW OBJECT                    }
{---------------------------------------------------------------------------}
   PView = ^TView;
   TView = OBJECT (TObject)
         GrowMode : Byte;                             { View grow mode }
         DragMode : Byte;                             { View drag mode }
         TabMask  : Byte;                             { Tab move masks }
         ColourOfs: Sw_Integer;                          { View palette offset }
         HelpCtx  : Word;                             { View help context }
         State    : Word;                             { View state masks }
         Options  : Word;                             { View options masks }
         EventMask: Word;                             { View event masks }
         Origin   : TPoint;                           { View origin }
         Size     : TPoint;                           { View size }
         Cursor   : TPoint;                           { Cursor position }
         Next     : PView;                            { Next peerview }
         Owner    : PGroup;                           { Owner group }
         HoldLimit: PComplexArea;                     { Hold limit values }

         RevCol    : Boolean;
         BackgroundChar : Char;

      CONSTRUCTOR Init (Var Bounds: TRect);
      CONSTRUCTOR Load (Var S: TStream);
      DESTRUCTOR Done; Virtual;
      FUNCTION Prev: PView;
      FUNCTION Execute: Word; Virtual;
      FUNCTION Focus: Boolean;
      FUNCTION DataSize: Sw_Word; Virtual;
      FUNCTION TopView: PView;
      FUNCTION PrevView: PView;
      FUNCTION NextView: PView;
      FUNCTION GetHelpCtx: Word; Virtual;
      FUNCTION EventAvail: Boolean;
      FUNCTION GetPalette: PPalette; Virtual;
      function MapColor (color:byte):byte;
      FUNCTION GetColor (Color: Word): Word;
      FUNCTION Valid (Command: Word): Boolean; Virtual;
      FUNCTION GetState (AState: Word): Boolean;
      FUNCTION TextWidth (const Txt: String): Sw_Integer;
      FUNCTION CTextWidth (const Txt: String): Sw_Integer;
      FUNCTION MouseInView (Point: TPoint): Boolean;
      FUNCTION CommandEnabled (Command: Word): Boolean;
      FUNCTION OverLapsArea (X1, Y1, X2, Y2: Sw_Integer): Boolean;
      FUNCTION MouseEvent (Var Event: TEvent; Mask: Word): Boolean;
      PROCEDURE Hide;
      PROCEDURE Show;
      PROCEDURE Draw; Virtual;
      PROCEDURE ResetCursor; Virtual;
      PROCEDURE Select;
      PROCEDURE Awaken; Virtual;
      PROCEDURE DrawView;
      PROCEDURE MakeFirst;
      PROCEDURE DrawCursor; Virtual;
      PROCEDURE HideCursor;
      PROCEDURE ShowCursor;
      PROCEDURE BlockCursor;
      PROCEDURE NormalCursor;
      PROCEDURE FocusFromTop; Virtual;
      PROCEDURE MoveTo (X, Y: Sw_Integer);
      PROCEDURE GrowTo (X, Y: Sw_Integer);
      PROCEDURE EndModal (Command: Word); Virtual;
      PROCEDURE SetCursor (X, Y: Sw_Integer);
      PROCEDURE PutInFrontOf (Target: PView);
      PROCEDURE SetCommands (Commands: TCommandSet);
      PROCEDURE EnableCommands (Commands: TCommandSet);
      PROCEDURE DisableCommands (Commands: TCommandSet);
      PROCEDURE SetState (AState: Word; Enable: Boolean); Virtual;
      PROCEDURE SetCmdState (Commands: TCommandSet; Enable: Boolean);
      PROCEDURE GetData (Var Rec); Virtual;
      PROCEDURE SetData (Var Rec); Virtual;
      PROCEDURE Store (Var S: TStream);
      PROCEDURE Locate (Var Bounds: TRect);
      PROCEDURE KeyEvent (Var Event: TEvent);
      PROCEDURE GetEvent (Var Event: TEvent); Virtual;
      PROCEDURE PutEvent (Var Event: TEvent); Virtual;
      PROCEDURE GetExtent (Var Extent: TRect);
      PROCEDURE GetBounds (Var Bounds: TRect);
      PROCEDURE SetBounds (Var Bounds: TRect);
      PROCEDURE GetClipRect (Var Clip: TRect);
      PROCEDURE ClearEvent (Var Event: TEvent);
      PROCEDURE HandleEvent (Var Event: TEvent); Virtual;
      PROCEDURE ChangeBounds (Var Bounds: TRect); Virtual;
      PROCEDURE SizeLimits (Var Min, Max: TPoint); Virtual;
      PROCEDURE GetCommands (Var Commands: TCommandSet);
      PROCEDURE GetPeerViewPtr (Var S: TStream; Var P);
      PROCEDURE PutPeerViewPtr (Var S: TStream; P: PView);
      PROCEDURE CalcBounds (Var Bounds: TRect; Delta: TPoint); Virtual;

      FUNCTION Exposed: Boolean;   { This needs help!!!!! }
      PROCEDURE WriteBuf (X, Y, W, H: Sw_Integer; Var Buf);
      PROCEDURE WriteLine (X, Y, W, H: Sw_Integer; Var Buf);
      PROCEDURE MakeLocal (Source: TPoint; Var Dest: TPoint);
      PROCEDURE MakeGlobal (Source: TPoint; Var Dest: TPoint);
      PROCEDURE WriteStr (X, Y: Sw_Integer; Str: String; Color: Byte);
      PROCEDURE WriteChar (X, Y: Sw_Integer; C: Char; Color: Byte;
        Count: Sw_Integer);
      PROCEDURE DragView (Event: TEvent; Mode: Byte; Var Limits: TRect;
        MinSize, MaxSize: TPoint);
   private
      procedure CursorChanged;
      procedure DrawHide(LastView: PView);
      procedure DrawShow(LastView: PView);
      procedure DrawUnderRect(var R: TRect; LastView: PView);
      procedure DrawUnderView(DoShadow: Boolean; LastView: PView);
      procedure do_WriteView(x1,x2,y:Sw_Integer; var Buf);
      procedure do_WriteViewRec1(x1,x2:Sw_integer; p:PView; shadowCounter:Sw_integer);
      procedure do_WriteViewRec2(x1,x2:Sw_integer; p:PView; shadowCounter:Sw_integer);
      function  do_ExposedRec1(x1,x2:Sw_integer; p:PView):boolean;
      function  do_ExposedRec2(x1,x2:Sw_integer; p:PView):boolean;
   END;

   SelectMode = (NormalSelect, EnterSelect, LeaveSelect);

{---------------------------------------------------------------------------}
{                  TGroup OBJECT - GROUP OBJECT ANCESTOR                    }
{---------------------------------------------------------------------------}
   TGroup = OBJECT (TView)
         Phase   : (phFocused, phPreProcess, phPostProcess);
         EndState: Word;                              { Modal result }
         Current : PView;                             { Selected subview }
         Last    : PView;                             { 1st view inserted }
         Buffer  : PVideoBuf;                         { Speed up buffer }
      CONSTRUCTOR Init (Var Bounds: TRect);
      CONSTRUCTOR Load (Var S: TStream);
      DESTRUCTOR Done; Virtual;
      FUNCTION First: PView;
      FUNCTION Execute: Word; Virtual;
      FUNCTION GetHelpCtx: Word; Virtual;
      FUNCTION DataSize: Sw_Word; Virtual;
      FUNCTION ExecView (P: PView): Word; Virtual;
      FUNCTION FirstThat (P: Pointer): PView;
      FUNCTION Valid (Command: Word): Boolean; Virtual;
      FUNCTION FocusNext (Forwards: Boolean): Boolean;
      PROCEDURE Draw; Virtual;
      PROCEDURE Lock;
      PROCEDURE UnLock;
      PROCEDURE ResetCursor; Virtual;
      PROCEDURE Awaken; Virtual;
      PROCEDURE ReDraw;
      PROCEDURE SelectDefaultView;
      PROCEDURE Insert (P: PView);
      PROCEDURE Delete (P: PView);
      PROCEDURE ForEach (P: Pointer);
      { ForEach can't be virtual because it generates SIGSEGV }
      PROCEDURE EndModal (Command: Word); Virtual;
      PROCEDURE SelectNext (Forwards: Boolean);
      PROCEDURE InsertBefore (P, Target: PView);
      PROCEDURE SetState (AState: Word; Enable: Boolean); Virtual;
      PROCEDURE GetData (Var Rec); Virtual;
      PROCEDURE SetData (Var Rec); Virtual;
      PROCEDURE Store (Var S: TStream);
      PROCEDURE EventError (Var Event: TEvent); Virtual;
      PROCEDURE HandleEvent (Var Event: TEvent); Virtual;
      PROCEDURE ChangeBounds (Var Bounds: TRect); Virtual;
      PROCEDURE GetSubViewPtr (Var S: TStream; Var P);
      PROCEDURE PutSubViewPtr (Var S: TStream; P: PView);
      function ClipChilds: boolean; virtual;
      procedure BeforeInsert(P: PView); virtual;
      procedure AfterInsert(P: PView); virtual;
      procedure BeforeDelete(P: PView); virtual;
      procedure AfterDelete(P: PView); virtual;

      PRIVATE
         LockFlag: Byte;
         Clip    : TRect;
      FUNCTION IndexOf (P: PView): Sw_Integer;
      FUNCTION FindNext (Forwards: Boolean): PView;
      FUNCTION FirstMatch (AState: Word; AOptions: Word): PView;
      PROCEDURE ResetCurrent;
      PROCEDURE RemoveView (P: PView);
      PROCEDURE InsertView (P, Target: PView);
      PROCEDURE SetCurrent (P: PView; Mode: SelectMode);
      procedure DrawSubViews(P, Bottom: PView);
   END;

{---------------------------------------------------------------------------}
{                    TFrame OBJECT - FRAME VIEW OBJECT                      }
{---------------------------------------------------------------------------}
TYPE
   TFrame = OBJECT (TView)
      CONSTRUCTOR Init (Var Bounds: TRect);
      FUNCTION GetPalette: PPalette; Virtual;
      procedure Draw; virtual;
      procedure HandleEvent(var Event: TEvent); virtual;
      procedure SetState(AState: Word; Enable: Boolean); virtual;
   private
      FrameMode: Word;
      procedure FrameLine(var FrameBuf; Y, N: Sw_Integer; Color: Byte);
   END;
   PFrame = ^TFrame;

{---------------------------------------------------------------------------}
{                   TScrollBar OBJECT - SCROLL BAR OBJECT                   }
{---------------------------------------------------------------------------}
TYPE
   TScrollChars = Array [0..4] of Char;

   TScrollBar = OBJECT (TView)
         Value : Sw_Integer;                             { Scrollbar value }
         Min   : Sw_Integer;                             { Scrollbar minimum }
         Max   : Sw_Integer;                             { Scrollbar maximum }
         PgStep: Sw_Integer;                             { One page step }
         ArStep: Sw_Integer;                             { One range step }
         Id    : Sw_Integer;                             { Scrollbar ID }
      CONSTRUCTOR Init (Var Bounds: TRect);
      CONSTRUCTOR Load (Var S: TStream);
      FUNCTION GetPalette: PPalette; Virtual;
      FUNCTION ScrollStep (Part: Sw_Integer): Sw_Integer; Virtual;
      PROCEDURE Draw; Virtual;
      PROCEDURE ScrollDraw;                                          Virtual;
      PROCEDURE SetValue (AValue: Sw_Integer);
      PROCEDURE SetRange (AMin, AMax: Sw_Integer);
      PROCEDURE SetStep (APgStep, AArStep: Sw_Integer);
      PROCEDURE SetParams (AValue, AMin, AMax, APgStep, AArStep: Sw_Integer);
      PROCEDURE Store (Var S: TStream);
      PROCEDURE HandleEvent (Var Event: TEvent); Virtual;
      PRIVATE
         Chars: TScrollChars;                         { Scrollbar chars }
      FUNCTION GetPos: Sw_Integer;
      FUNCTION GetSize: Sw_Integer;
      PROCEDURE DrawPos (Pos: Sw_Integer);
   END;
   PScrollBar = ^TScrollBar;

{---------------------------------------------------------------------------}
{                 TScroller OBJECT - SCROLLING VIEW ANCESTOR                }
{---------------------------------------------------------------------------}
TYPE
   TScroller = OBJECT (TView)
         Delta     : TPoint;
         Limit     : TPoint;
         HScrollBar: PScrollBar;                      { Horz scroll bar }
         VScrollBar: PScrollBar;                      { Vert scroll bar }
      CONSTRUCTOR Init (Var Bounds: TRect; AHScrollBar, AVScrollBar: PScrollBar);
      CONSTRUCTOR Load (Var S: TStream);
      FUNCTION GetPalette: PPalette; Virtual;
      PROCEDURE ScrollDraw;                                          Virtual;
      PROCEDURE SetLimit (X, Y: Sw_Integer);
      PROCEDURE ScrollTo (X, Y: Sw_Integer);
      PROCEDURE SetState (AState: Word; Enable: Boolean); Virtual;
      PROCEDURE Store (Var S: TStream);
      PROCEDURE HandleEvent (Var Event: TEvent); Virtual;
      PROCEDURE ChangeBounds (Var Bounds: TRect); Virtual;
        PRIVATE
         DrawFlag: Boolean;
         DrawLock: Byte;
      PROCEDURE CheckDraw;
   END;
   PScroller = ^TScroller;

{---------------------------------------------------------------------------}
{                  TListViewer OBJECT - LIST VIEWER OBJECT                  }
{---------------------------------------------------------------------------}
TYPE
   TListViewer = OBJECT (TView)
         NumCols   : Sw_Integer;                         { Number of columns }
         TopItem   : Sw_Integer;                         { Top most item }
         Focused   : Sw_Integer;                         { Focused item }
         Range     : Sw_Integer;                         { Range of listview }
         HScrollBar: PScrollBar;                      { Horz scrollbar }
         VScrollBar: PScrollBar;                      { Vert scrollbar }
      CONSTRUCTOR Init (Var Bounds: TRect; ANumCols: Sw_Word; AHScrollBar,
        AVScrollBar: PScrollBar);
      CONSTRUCTOR Load (Var S: TStream);
      FUNCTION GetPalette: PPalette; Virtual;
      FUNCTION IsSelected (Item: Sw_Integer): Boolean; Virtual;
      FUNCTION GetText (Item: Sw_Integer; MaxLen: Sw_Integer): String; Virtual;
      PROCEDURE Draw; Virtual;
      PROCEDURE FocusItem (Item: Sw_Integer); Virtual;
      PROCEDURE SetTopItem (Item: Sw_Integer);
      PROCEDURE SetRange (ARange: Sw_Integer);
      PROCEDURE SelectItem (Item: Sw_Integer); Virtual;
      PROCEDURE SetState (AState: Word; Enable: Boolean); Virtual;
      PROCEDURE Store (Var S: TStream);
      PROCEDURE HandleEvent (Var Event: TEvent); Virtual;
      PROCEDURE ChangeBounds (Var Bounds: TRect); Virtual;
      PROCEDURE FocusItemNum (Item: Sw_Integer); Virtual;
   END;
   PListViewer = ^TListViewer;

{---------------------------------------------------------------------------}
{                  TWindow OBJECT - WINDOW OBJECT ANCESTOR                  }
{---------------------------------------------------------------------------}
TYPE
   TWindow = OBJECT (TGroup)
         Flags   : Byte;                              { Window flags }
         Number  : Sw_Integer;                           { Window number }
         Palette : Sw_Integer;                           { Window palette }
         ZoomRect: TRect;                             { Zoom rectangle }
         Frame   : PFrame;                            { Frame view object }
         Title   : PString;                           { Title string }
      CONSTRUCTOR Init (Var Bounds: TRect; ATitle: TTitleStr; ANumber: Sw_Integer);
      CONSTRUCTOR Load (Var S: TStream);
      DESTRUCTOR Done; Virtual;
      FUNCTION GetPalette: PPalette; Virtual;
      FUNCTION GetTitle (MaxSize: Sw_Integer): TTitleStr; Virtual;
      FUNCTION StandardScrollBar (AOptions: Word): PScrollBar;
      PROCEDURE Zoom; Virtual;
      PROCEDURE Close; Virtual;
      PROCEDURE InitFrame; Virtual;
      PROCEDURE SetState (AState: Word; Enable: Boolean); Virtual;
      PROCEDURE Store (Var S: TStream);
      PROCEDURE HandleEvent (Var Event: TEvent); Virtual;
      PROCEDURE SizeLimits (Var Min, Max: TPoint); Virtual;
   END;
   PWindow = ^TWindow;

{***************************************************************************}
{                            INTERFACE ROUTINES                             }
{***************************************************************************}

{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{                         WINDOW MESSAGE ROUTINES                           }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}

{-Message------------------------------------------------------------
Message sets up an event record and calls Receiver^.HandleEvent to
handle the event. Message returns nil if Receiver is nil, or if
the event is not handled successfully.
12Sep97 LdB
---------------------------------------------------------------------}
FUNCTION Message (Receiver: PView; What, Command: Word;
  InfoPtr: Pointer): Pointer;

{-NewMessage---------------------------------------------------------
NewMessage sets up an event record including the new fields and calls
Receiver^.HandleEvent to handle the event. Message returns nil if
Receiver is nil, or if the event is not handled successfully.
19Sep97 LdB
---------------------------------------------------------------------}
FUNCTION NewMessage (P: PView; What, Command: Word; Id: Sw_Integer; Data: Real;
  InfoPtr: Pointer): Pointer;

{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{                     VIEW OBJECT REGISTRATION ROUTINES                     }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{-RegisterViews------------------------------------------------------
This registers all the view type objects used in this unit.
11Aug99 LdB
---------------------------------------------------------------------}
PROCEDURE RegisterViews;

{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{                            NEW VIEW ROUTINES                              }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}

{-CreateIdScrollBar--------------------------------------------------
Creates and scrollbar object of the given size and direction and sets
the scrollbar id number.
22Sep97 LdB
---------------------------------------------------------------------}
FUNCTION CreateIdScrollBar (X, Y, Size, Id: Sw_Integer; Horz: Boolean): PScrollBar;

{***************************************************************************}
{                        INITIALIZED PUBLIC VARIABLES                       }
{***************************************************************************}


{---------------------------------------------------------------------------}
{                 INITIALIZED DOS/DPMI/WIN/NT/OS2 VARIABLES                 }
{---------------------------------------------------------------------------}
CONST
   UseNativeClasses: Boolean = True;                  { Native class modes }
   CommandSetChanged: Boolean = False;                { Command change flag }
   ShowMarkers: Boolean = False;                      { Show marker state }
   ErrorAttr: Byte = $CF;                             { Error colours }
   PositionalEvents: Word = evMouse;                  { Positional defined }
   FocusedEvents: Word = evKeyboard + evCommand;      { Focus defined }
   MinWinSize: TPoint = (X: 16; Y: 6);                { Minimum window size }
   ShadowSize: TPoint = (X: 2; Y: 1);                 { Shadow sizes }
   ShadowAttr: Byte = $08;                            { Shadow attribute }

{ Characters used for drawing selected and default items in  }
{ monochrome color sets                                      }
   SpecialChars: Array [0..5] Of Char = (#175, #174, #26, #27, ' ', ' ');

{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{                        STREAM REGISTRATION RECORDS                        }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}

{---------------------------------------------------------------------------}
{                         TView STREAM REGISTRATION                         }
{---------------------------------------------------------------------------}
CONST
   RView: TStreamRec = (
     ObjType: idView;                                 { Register id = 1 }
     VmtLink: TypeOf(TView);                          { Alt style VMT link }
     Load:    @TView.Load;                            { Object load method }
     Store:   @TView.Store                            { Object store method }
   );

{---------------------------------------------------------------------------}
{                        TFrame STREAM REGISTRATION                         }
{---------------------------------------------------------------------------}
CONST
   RFrame: TStreamRec = (
     ObjType: idFrame;                                { Register id = 2 }
     VmtLink: TypeOf(TFrame);                         { Alt style VMT link }
     Load:    @TFrame.Load;                           { Frame load method }
     Store:   @TFrame.Store                           { Frame store method }
   );

{---------------------------------------------------------------------------}
{                      TScrollBar STREAM REGISTRATION                       }
{---------------------------------------------------------------------------}
CONST
   RScrollBar: TStreamRec = (
     ObjType: idScrollBar;                            { Register id = 3 }
     VmtLink: TypeOf(TScrollBar);                     { Alt style VMT link }
     Load:    @TScrollBar.Load;                       { Object load method }
     Store:   @TScrollBar.Store                       { Object store method }
   );

{---------------------------------------------------------------------------}
{                       TScroller STREAM REGISTRATION                       }
{---------------------------------------------------------------------------}
CONST
   RScroller: TStreamRec = (
     ObjType: idScroller;                             { Register id = 4 }
     VmtLink: TypeOf(TScroller);                      { Alt style VMT link }
     Load:    @TScroller.Load;                        { Object load method }
     Store:   @TScroller.Store                        { Object store method }
   );

{---------------------------------------------------------------------------}
{                      TListViewer STREAM REGISTRATION                      }
{---------------------------------------------------------------------------}
CONST
   RListViewer: TStreamRec = (
     ObjType: idListViewer;                           { Register id = 5 }
     VmtLink: TypeOf(TListViewer);                    { Alt style VMT link }
     Load:    @TListViewer.Load;                      { Object load method }
     Store:   @TLIstViewer.Store                      { Object store method }
   );

{---------------------------------------------------------------------------}
{                        TGroup STREAM REGISTRATION                         }
{---------------------------------------------------------------------------}
CONST
   RGroup: TStreamRec = (
     ObjType: idGroup;                                { Register id = 6 }
     VmtLink: TypeOf(TGroup);                         { Alt style VMT link }
     Load:    @TGroup.Load;                           { Object load method }
     Store:   @TGroup.Store                           { Object store method }
   );

{---------------------------------------------------------------------------}
{                        TWindow STREAM REGISTRATION                        }
{---------------------------------------------------------------------------}
CONST
   RWindow: TStreamRec = (
     ObjType: idWindow;                               { Register id = 7 }
     VmtLink: TypeOf(TWindow);                        { Alt style VMT link }
     Load:    @TWindow.Load;                          { Object load method }
     Store:   @TWindow.Store                          { Object store method }
   );


{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
                             IMPLEMENTATION
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}

USES
  Video;

{***************************************************************************}
{                       PRIVATE TYPE DEFINITIONS                            }
{***************************************************************************}

{---------------------------------------------------------------------------}
{                         TFixupList DEFINITION                             }
{---------------------------------------------------------------------------}
TYPE
   TFixupList = ARRAY [1..4096] Of Pointer;           { Fix up ptr array }
   PFixupList = ^TFixupList;                          { Ptr to fix up list }

{***************************************************************************}
{                      PRIVATE INITIALIZED VARIABLES                        }
{***************************************************************************}

{---------------------------------------------------------------------------}
{            INITIALIZED DOS/DPMI/WIN/NT/OS2 PRIVATE VARIABLES              }
{---------------------------------------------------------------------------}
CONST
   TheTopView  : PView = Nil;                         { Top focused view }
   LimitsLocked: PView = Nil;                         { View locking limits }
   OwnerGroup  : PGroup = Nil;                        { Used for loading }
   FixupList   : PFixupList = Nil;                    { Used for loading }
   CurCommandSet: TCommandSet = ([0..255] -
     [cmZoom, cmClose, cmResize, cmNext, cmPrev]);    { All active but these }

  vdInSetCursor  = $80;                               { AVOID RECURSION IN SetCursor }

  { Flags for TFrame }
  fmCloseClicked = $01;
  fmZoomClicked  = $02;


type
  TstatVar2 = record
    target : PView;
    offset,y : integer;
  end;

var
  staticVar1 : PDrawBuffer;
  staticVar2 : TstatVar2;


{***************************************************************************}
{                          PRIVATE INTERNAL ROUTINES                        }
{***************************************************************************}

    function posidx(const substr,s : string;idx:sw_integer):sw_integer;
      var
        i,j : sw_integer;
        e   : boolean;
      begin
        i:=idx;
        j:=0;
        e:=(length(SubStr)>0);
        while e and (i<=Length(s)-Length(SubStr)) do
         begin
           if (SubStr[1]=s[i]) and (Substr=Copy(s,i,Length(SubStr))) then
            begin
              j:=i;
              e:=false;
            end;
           inc(i);
         end;
        PosIdx:=j;
      end;


{$ifdef UNIX}
const
  MouseUsesVideoBuf = true;
{$else not UNIX}
const
  MouseUsesVideoBuf = false;
{$endif not UNIX}

procedure DrawScreenBuf;
begin
  if (GetLockScreenCount=0) then
   begin
     If MouseUsesVideoBuf then
       begin
         LockScreenUpdate;
         HideMouse;
         ShowMouse;
         UnlockScreenUpdate;
       end
     else
       HideMouse;
     UpdateScreen(false);
     If not MouseUsesVideoBuf then
       ShowMouse;
   end;
end;


{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{                         VIEW PORT CONTROL ROUTINES                        }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}

TYPE
   ViewPortType = RECORD
     X1, Y1, X2, Y2: Integer;                         { Corners of viewport }
     Clip          : Boolean;                         { Clip status }
   END;

var
  ViewPort : ViewPortType;

{---------------------------------------------------------------------------}
{  GetViewSettings -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 05Dec2000 LdB }
{---------------------------------------------------------------------------}
PROCEDURE GetViewSettings (Var CurrentViewPort: ViewPortType);
BEGIN
   CurrentViewPort := ViewPort;                       { Textmode viewport }
END;

{---------------------------------------------------------------------------}
{  SetViewPort -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 05Dec2000 LdB     }
{---------------------------------------------------------------------------}
PROCEDURE SetViewPort (X1, Y1, X2, Y2: Integer; Clip: Boolean);
BEGIN
     If (X1 < 0) Then X1 := 0;                        { X1 negative fix }
     If (X1 >ScreenWidth) Then
       X1 := ScreenWidth;                             { X1 off screen fix }
     If (Y1 < 0) Then Y1 := 0;                        { Y1 negative fix }
     If (Y1 > ScreenHeight) Then
       Y1 := ScreenHeight;                            { Y1 off screen fix }
     If (X2 < 0) Then X2 := 0;                        { X2 negative fix }
     If (X2 > ScreenWidth) Then
       X2 := ScreenWidth;                             { X2 off screen fix }
     If (Y2 < 0) Then Y2 := 0;                        { Y2 negative fix }
     If (Y2 > ScreenHeight) Then
       Y2 := ScreenHeight;                            { Y2 off screen fix }
     ViewPort.X1 := X1;                               { Set X1 port value }
     ViewPort.Y1 := Y1;                               { Set Y1 port value }
     ViewPort.X2 := X2;                               { Set X2 port value }
     ViewPort.Y2 := Y2;                               { Set Y2 port value }
     ViewPort.Clip := Clip;                           { Set port clip value }
{ $ifdef DEBUG
     If WriteDebugInfo then
       Writeln(stderr,'New ViewPort(',X1,',',Y1,',',X2,',',Y2,')');
 $endif DEBUG}
END;

{***************************************************************************}
{                              OBJECT METHODS                               }
{***************************************************************************}

{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{                            TView OBJECT METHODS                           }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}

{--TView--------------------------------------------------------------------}
{  Init -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 20Jun96 LdB              }
{---------------------------------------------------------------------------}
CONSTRUCTOR TView.Init (Var Bounds: TRect);
BEGIN
   Inherited Init;                                    { Call ancestor }
   DragMode := dmLimitLoY;                            { Default drag mode }
   HelpCtx := hcNoContext;                            { Clear help context }
   State := sfVisible;                                { Default state }
   EventMask := evMouseDown + evKeyDown + evCommand;  { Default event masks }
   BackgroundChar := ' ';
   SetBounds(Bounds);                                 { Set view bounds }
END;

{--TView--------------------------------------------------------------------}
{  Load -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 06May98 LdB              }
{---------------------------------------------------------------------------}
{   This load method will read old original TV data from a stream but the   }
{  new options and tabmasks are not set so some NEW functionality is not    }
{  supported but it should work as per original TV code.                    }
{---------------------------------------------------------------------------}
CONSTRUCTOR TView.Load (Var S: TStream);
VAR i: Integer;
BEGIN
   Inherited Init;                                    { Call ancestor }
   S.Read(i, SizeOf(i)); Origin.X:=i;                 { Read origin x value }
   S.Read(i, SizeOf(i)); Origin.Y:=i;                 { Read origin y value }
   S.Read(i, SizeOf(i)); Size.X:=i;                   { Read view x size }
   S.Read(i, SizeOf(i)); Size.Y:=i;                   { Read view y size }
   S.Read(i, SizeOf(i)); Cursor.X:=i;                 { Read cursor x size }
   S.Read(i, SizeOf(i)); Cursor.Y:=i;                 { Read cursor y size }
   S.Read(GrowMode, SizeOf(GrowMode));                { Read growmode flags }
   S.Read(DragMode, SizeOf(DragMode));                { Read dragmode flags }
   S.Read(HelpCtx, SizeOf(HelpCtx));                  { Read help context }
   S.Read(State, SizeOf(State));                      { Read state masks }
   S.Read(Options, SizeOf(Options));                  { Read options masks }
   S.Read(Eventmask, SizeOf(Eventmask));              { Read event masks }
END;

{--TView--------------------------------------------------------------------}
{  Done -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 17Nov99 LdB              }
{---------------------------------------------------------------------------}
DESTRUCTOR TView.Done;
VAR P: PComplexArea;
BEGIN
   Hide;                                              { Hide the view }
   If (Owner <> Nil) Then Owner^.Delete(@Self);       { Delete from owner }
   While (HoldLimit <> Nil) Do Begin                  { Free limit memory }
     P := HoldLimit^.NextArea;                        { Hold next pointer }
     FreeMem(HoldLimit, SizeOf(TComplexArea));        { Release memory }
     HoldLimit := P;                                  { Shuffle to next }
   End;
END;

{--TView--------------------------------------------------------------------}
{  Prev -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB              }
{---------------------------------------------------------------------------}
FUNCTION TView.Prev: PView;
VAR NP : PView;
BEGIN
   Prev := @Self;
   NP := Next;
   While (NP <> Nil) AND (NP <> @Self) Do
     Begin
       Prev := NP;                                       { Locate next view }
       NP := NP^.Next;
     End;
END;

{--TView--------------------------------------------------------------------}
{  Execute -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB           }
{---------------------------------------------------------------------------}
FUNCTION TView.Execute: Word;
BEGIN
   Execute := cmCancel;                               { Return cancel }
END;

{--TView--------------------------------------------------------------------}
{  Focus -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 05May98 LdB             }
{---------------------------------------------------------------------------}
FUNCTION TView.Focus: Boolean;
VAR Res: Boolean;
BEGIN
   Res := True;                                       { Preset result }
   If (State AND (sfSelected + sfModal)=0) Then Begin { Not modal/selected }
     If (Owner <> Nil) Then Begin                     { View has an owner }
       Res := Owner^.Focus;                           { Return focus state }
       If Res Then                                    { Owner has focus }
         If ((Owner^.Current = Nil) OR                { No current view }
         (Owner^.Current^.Options AND ofValidate = 0) { Non validating view }
         OR (Owner^.Current^.Valid(cmReleasedFocus))) { Okay to drop focus }
           Then Select Else Res := False;             { Then select us }
     End;
   End;
   Focus := Res;                                      { Return focus result }
END;

{--TView--------------------------------------------------------------------}
{  DataSize -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB          }
{---------------------------------------------------------------------------}
FUNCTION TView.DataSize: Sw_Word;
BEGIN
   DataSize := 0;                                     { Transfer size }
END;

{--TView--------------------------------------------------------------------}
{  TopView -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB           }
{---------------------------------------------------------------------------}
FUNCTION TView.TopView: PView;
VAR P: PView;
BEGIN
   If (TheTopView = Nil) Then Begin                   { Check topmost view }
     P := @Self;                                      { Start with us }
     While (P <> Nil) AND (P^.State AND sfModal = 0)  { Check if modal }
       Do P := P^.Owner;                              { Search each owner }
     TopView := P;                                    { Return result }
   End Else TopView := TheTopView;                    { Return topview }
END;

{--TView--------------------------------------------------------------------}
{  PrevView -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB          }
{---------------------------------------------------------------------------}
FUNCTION TView.PrevView: PView;
BEGIN
   If (@Self = Owner^.First) Then PrevView := Nil     { We are first view }
     Else PrevView := Prev;                           { Return our prior }
END;

{--TView--------------------------------------------------------------------}
{  NextView -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB          }
{---------------------------------------------------------------------------}
FUNCTION TView.NextView: PView;
BEGIN
   If (@Self = Owner^.Last) Then NextView := Nil      { This is last view }
     Else NextView := Next;                           { Return our next }
END;

{--TView--------------------------------------------------------------------}
{  GetHelpCtx -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB        }
{---------------------------------------------------------------------------}
FUNCTION TView.GetHelpCtx: Word;
BEGIN
   If (State AND sfDragging <> 0) Then                { Dragging state check }
     GetHelpCtx := hcDragging Else                    { Return dragging }
     GetHelpCtx := HelpCtx;                           { Return help context }
END;

{--TView--------------------------------------------------------------------}
{  EventAvail -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB        }
{---------------------------------------------------------------------------}
FUNCTION TView.EventAvail: Boolean;
VAR Event: TEvent;
BEGIN
   GetEvent(Event);                                   { Get next event }
   If (Event.What <> evNothing) Then PutEvent(Event); { Put it back }
   EventAvail := (Event.What <> evNothing);           { Return result }
END;

{--TView--------------------------------------------------------------------}
{  GetPalette -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB        }
{---------------------------------------------------------------------------}
FUNCTION TView.GetPalette: PPalette;
BEGIN
   GetPalette := Nil;                                 { Return nil ptr }
END;

{--TView--------------------------------------------------------------------}
{  MapColor -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 17Jul99 LdB          }
{---------------------------------------------------------------------------}
function TView.MapColor(color:byte):byte;
var
  cur : PView;
  p   : PPalette;
begin
  if color=0 then
   MapColor:=errorAttr
  else
   begin
     cur:=@Self;
     repeat
       p:=cur^.GetPalette;
       if (p<>Nil) then
        if ord(p^[0])<>0 then
         begin
           if color>ord(p^[0]) then
            begin
              MapColor:=errorAttr;
              Exit;
            end;
           color:=ord(p^[color]);
           if color=0 then
            begin
              MapColor:=errorAttr;
              Exit;
            end;
         end;
       cur:=cur^.Owner;
     until (cur=Nil);
     MapColor:=color;
   end;
end;


{--TView--------------------------------------------------------------------}
{  GetColor -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 17Jul99 LdB          }
{---------------------------------------------------------------------------}
FUNCTION TView.GetColor (Color: Word): Word;
VAR Col: Byte; W: Word; P: PPalette; Q: PView;
BEGIN
   W := 0;                                            { Clear colour Sw_Word }
   If (Hi(Color) > 0) Then Begin                      { High colour req }
     Col := Hi(Color) + ColourOfs;                    { Initial offset }
     Q := @Self;                                      { Pointer to self }
     Repeat
       P := Q^.GetPalette;                            { Get our palette }
       If (P <> Nil) Then Begin                       { Palette is valid }
         If (Col <= Length(P^)) Then
           Col := Ord(P^[Col]) Else                   { Return colour }
           Col := ErrorAttr;                          { Error attribute }
       End;
       Q := Q^.Owner;                                 { Move up to owner }
     Until (Q = Nil);                                 { Until no owner }
     W := Col SHL 8;                                  { Translate colour }
   End;
   If (Lo(Color) > 0) Then Begin
     Col := Lo(Color) + ColourOfs;                    { Initial offset }
     Q := @Self;                                      { Pointer to self }
     Repeat
       P := Q^.GetPalette;                            { Get our palette }
       If (P <> Nil) Then Begin                       { Palette is valid }
         If (Col <= Length(P^)) Then
           Col := Ord(P^[Col]) Else                   { Return colour }
           Col := ErrorAttr;                          { Error attribute }
       End;
       Q := Q^.Owner;                                 { Move up to owner }
     Until (Q = Nil);                                 { Until no owner }
   End Else Col := ErrorAttr;                         { No colour found }
   GetColor := W OR Col;                              { Return color }
END;

{--TView--------------------------------------------------------------------}
{  Valid -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB             }
{---------------------------------------------------------------------------}
FUNCTION TView.Valid (Command: Word): Boolean;
BEGIN
   Valid := True;                                     { Simply return true }
END;

{--TView--------------------------------------------------------------------}
{  GetState -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB          }
{---------------------------------------------------------------------------}
FUNCTION TView.GetState (AState: Word): Boolean;
BEGIN
   GetState := State AND AState = AState;             { Check states equal }
END;

{--TView--------------------------------------------------------------------}
{  TextWidth -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 25Nov99 LdB         }
{---------------------------------------------------------------------------}
FUNCTION TView.TextWidth (const Txt: String): Sw_Integer;
BEGIN
   TextWidth := Length(Txt);             { Calc text length }
END;

FUNCTION TView.CTextWidth (const Txt: String): Sw_Integer;
VAR I: Sw_Integer; S: String;
BEGIN
   S := Txt;                                          { Transfer text }
   Repeat
     I := Pos('~', S);                                { Check for tilde }
      If (I <> 0) Then System.Delete(S, I, 1);        { Remove the tilde }
   Until (I = 0);                                     { Remove all tildes }
   CTextWidth := Length(S);             { Calc text length }
END;

{--TView--------------------------------------------------------------------}
{  MouseInView -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB       }
{---------------------------------------------------------------------------}
FUNCTION TView.MouseInView (Point: TPoint): Boolean;
BEGIN
  MakeLocal(Point,Point);
  MouseInView := (Point.X >= 0) and
                 (Point.Y >= 0) and
                 (Point.X < Size.X) and
                 (Point.Y < Size.Y);
END;

{--TView--------------------------------------------------------------------}
{  CommandEnabled -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB    }
{---------------------------------------------------------------------------}
FUNCTION TView.CommandEnabled(Command: Word): Boolean;
BEGIN
   CommandEnabled := (Command > 255) OR
     (Command IN CurCommandSet);                      { Check command }
END;

{--TView--------------------------------------------------------------------}
{  OverLapsArea -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 17Sep97 LdB      }
{---------------------------------------------------------------------------}
FUNCTION TView.OverlapsArea (X1, Y1, X2, Y2: Sw_Integer): Boolean;
BEGIN
   OverLapsArea := False;                             { Preset false }
   If (Origin.X > X2) Then Exit;                   { Area to the left }
   If ((Origin.X + Size.X) < X1) Then Exit;     { Area to the right }
   If (Origin.Y > Y2) Then Exit;                   { Area is above }
   If ((Origin.Y + Size.Y) < Y1) Then Exit;     { Area is below }
   OverLapsArea := True;                              { Return true }
END;

{--TView--------------------------------------------------------------------}
{  MouseEvent -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB        }
{---------------------------------------------------------------------------}
FUNCTION TView.MouseEvent (Var Event: TEvent; Mask: Word): Boolean;
BEGIN
   Repeat
     GetEvent(Event);                                 { Get next event }
   Until (Event.What AND (Mask OR evMouseUp) <> 0);   { Wait till valid }
   MouseEvent := Event.What <> evMouseUp;             { Return result }
END;

{--TView--------------------------------------------------------------------}
{  Hide -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB              }
{---------------------------------------------------------------------------}
PROCEDURE TView.Hide;
BEGIN
   If (State AND sfVisible <> 0) Then                 { View is visible }
     SetState(sfVisible, False);                      { Hide the view }
END;

{--TView--------------------------------------------------------------------}
{  Show -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB              }
{---------------------------------------------------------------------------}
PROCEDURE TView.Show;
BEGIN
   If (State AND sfVisible = 0) Then                  { View not visible }
     SetState(sfVisible, True);                       { Show the view }
END;

{--TView--------------------------------------------------------------------}
{  Draw -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 17Sep97 LdB              }
{---------------------------------------------------------------------------}
PROCEDURE TView.Draw;
VAR B : TDrawBuffer;
BEGIN
  MoveChar(B, ' ', GetColor(1), Size.X);
  WriteLine(0, 0, Size.X, Size.Y, B);
END;


procedure TView.ResetCursor;
const
  sfV_CV_F:word = sfVisible + sfCursorVis + sfFocused;
var
  p,p2 : PView;
  G : PGroup;
  cur : TPoint;

  function Check0:boolean;
  var
    res : byte;
  begin
    res:=0;
    while res=0 do
     begin
       p:=p^.next;
       if p=p2 then
        begin
          p:=P^.owner;
          res:=1
        end
       else
        if ((p^.state and sfVisible)<>0) and
           (cur.x>=p^.origin.x) and
           (cur.x<p^.size.x+p^.origin.x) and
           (cur.y>=p^.origin.y) and
           (cur.y<p^.size.y+p^.origin.y) then
          res:=2;
     end;
    Check0:=res=2;
  end;

begin
  if ((state and sfV_CV_F) = sfV_CV_F) then
   begin
     p:=@Self;
     cur:=cursor;
     while true do
      begin
        if (cur.x<0) or (cur.x>=p^.size.x) or
           (cur.y<0) or (cur.y>=p^.size.y) then
          break;
        inc(cur.X,p^.origin.X);
        inc(cur.Y,p^.origin.Y);
        p2:=p;
        G:=p^.owner;
        if G=Nil then { top view }
         begin
           Video.SetCursorPos(cur.x,cur.y);
           if (state and sfCursorIns)<>0 then
             Video.SetCursorType(crBlock)
           else
             Video.SetCursorType(crUnderline);
           exit;
         end;
        if (G^.state and sfVisible)=0 then
         break;
        p:=G^.Last;
        if Check0 then
         break;
      end; { while }
   end; { if }
  Video.SetCursorType(crHidden);
end;


{--TView--------------------------------------------------------------------}
{  Select -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 05May98 LdB            }
{---------------------------------------------------------------------------}
PROCEDURE TView.Select;
BEGIN
   If (Options AND ofSelectable <> 0) Then            { View is selectable }
     If (Options AND ofTopSelect <> 0) Then MakeFirst { Top selectable }
     Else If (Owner <> Nil) Then                      { Valid owner }
       Owner^.SetCurrent(@Self, NormalSelect);        { Make owners current }
END;

{--TView--------------------------------------------------------------------}
{  Awaken -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 15Sep97 LdB            }
{---------------------------------------------------------------------------}
PROCEDURE TView.Awaken;
BEGIN                                                 { Abstract method }
END;


{--TView--------------------------------------------------------------------}
{  MakeFirst -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 29Sep99 LdB         }
{---------------------------------------------------------------------------}
PROCEDURE TView.MakeFirst;
BEGIN
   If (Owner <> Nil) Then Begin                       { Must have owner }
     PutInFrontOf(Owner^.First);                      { Float to the top }
   End;
END;

{--TView--------------------------------------------------------------------}
{  DrawCursor -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 17Sep97 LdB        }
{---------------------------------------------------------------------------}
PROCEDURE TView.DrawCursor;
BEGIN                                                 { Abstract method }
  if State and sfFocused <> 0 then
    ResetCursor;
END;


procedure TView.DrawHide(LastView: PView);
begin
  TView.DrawCursor;
  DrawUnderView(State and sfShadow <> 0, LastView);
end;


procedure TView.DrawShow(LastView: PView);
begin
  DrawView;
  if State and sfShadow <> 0 then
   DrawUnderView(True, LastView);
end;


procedure TView.DrawUnderRect(var R: TRect; LastView: PView);
begin
  Owner^.Clip.Intersect(R);
  Owner^.DrawSubViews(NextView, LastView);
  Owner^.GetExtent(Owner^.Clip);
end;


procedure TView.DrawUnderView(DoShadow: Boolean; LastView: PView);
var
  R: TRect;
begin
  GetBounds(R);
  if DoShadow then
   begin
     inc(R.B.X,ShadowSize.X);
     inc(R.B.Y,ShadowSize.Y);
   end;
  DrawUnderRect(R, LastView);
end;


procedure TView.DrawView;
begin
  if Exposed then
   begin
     LockScreenUpdate; { don't update the screen yet }
     Draw;
     UnLockScreenUpdate;
     DrawScreenBuf;
     TView.DrawCursor;
   end;
end;


{--TView--------------------------------------------------------------------}
{  HideCursor -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 15Sep97 LdB        }
{---------------------------------------------------------------------------}
PROCEDURE TView.HideCursor;
BEGIN
   SetState(sfCursorVis , False);                     { Hide the cursor }
END;

{--TView--------------------------------------------------------------------}
{  ShowCursor -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 15Sep97 LdB        }
{---------------------------------------------------------------------------}
PROCEDURE TView.ShowCursor;
BEGIN
   SetState(sfCursorVis , True);                      { Show the cursor }
END;

{--TView--------------------------------------------------------------------}
{  BlockCursor -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 15Sep97 LdB       }
{---------------------------------------------------------------------------}
PROCEDURE TView.BlockCursor;
BEGIN
   SetState(sfCursorIns, True);                       { Set insert mode }
END;

{--TView--------------------------------------------------------------------}
{  NormalCursor -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 15Sep97 LdB      }
{---------------------------------------------------------------------------}
PROCEDURE TView.NormalCursor;
BEGIN
   SetState(sfCursorIns, False);                      { Clear insert mode }
END;

{--TView--------------------------------------------------------------------}
{  FocusFromTop -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 11Aug99 LdB      }
{---------------------------------------------------------------------------}
PROCEDURE TView.FocusFromTop;
BEGIN
   If (Owner <> Nil) AND
     (Owner^.State AND sfSelected = 0)
       Then Owner^.Select;
   If (State AND sfFocused = 0) Then Focus;
   If (State AND sfSelected = 0) Then Select;
END;

{--TView--------------------------------------------------------------------}
{  MoveTo -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB            }
{---------------------------------------------------------------------------}
PROCEDURE TView.MoveTo (X, Y: Sw_Integer);
VAR R: TRect;
BEGIN
   R.Assign(X, Y, X + Size.X, Y + Size.Y);            { Assign area }
   Locate(R);                                         { Locate the view }
END;

{--TView--------------------------------------------------------------------}
{  GrowTo -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB            }
{---------------------------------------------------------------------------}
PROCEDURE TView.GrowTo (X, Y: Sw_Integer);
VAR R: TRect;
BEGIN
   R.Assign(Origin.X, Origin.Y, Origin.X + X,
     Origin.Y + Y);                                   { Assign area }
   Locate(R);                                         { Locate the view }
END;

{--TView--------------------------------------------------------------------}
{  EndModal -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB          }
{---------------------------------------------------------------------------}
PROCEDURE TView.EndModal (Command: Word);
VAR P: PView;
BEGIN
   P := TopView;                                      { Get top view }
   If (P <> Nil) Then P^.EndModal(Command);           { End modal operation }
END;

{--TView--------------------------------------------------------------------}
{  SetCursor -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 15Sep97 LdB         }
{---------------------------------------------------------------------------}
PROCEDURE TView.SetCursor (X, Y: Sw_Integer);
BEGIN
  if (Cursor.X<>X) or (Cursor.Y<>Y) then
  begin
    Cursor.X := X;
    Cursor.Y := Y;
    CursorChanged;
  end;
  TView.DrawCursor;
END;


procedure TView.CursorChanged;
begin
  Message(Owner,evBroadcast,cmCursorChanged,@Self);
end;


{--TView--------------------------------------------------------------------}
{  PutInFrontOf -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 29Sep99 LdB      }
{---------------------------------------------------------------------------}
PROCEDURE TView.PutInFrontOf (Target: PView);
VAR P, LastView: PView;
BEGIN
   If (Owner <> Nil) AND (Target <> @Self) AND
   (Target <> NextView) AND ((Target = Nil) OR
   (Target^.Owner = Owner)) Then                      { Check validity }
     If (State AND sfVisible = 0) Then Begin          { View not visible }
       Owner^.RemoveView(@Self);                      { Remove from list }
       Owner^.InsertView(@Self, Target);              { Insert into list }
     End Else Begin
       LastView := NextView;                          { Hold next view }
       If (LastView <> Nil) Then Begin                { Lastview is valid }
         P := Target;                                 { P is target }
         While (P <> Nil) AND (P <> LastView)
           Do P := P^.NextView;                       { Find our next view }
         If (P = Nil) Then LastView := Target;        { Lastview is target }
       End;
       State := State AND NOT sfVisible;              { Temp stop drawing }
       If (LastView = Target) Then
         DrawHide(LastView);
       Owner^.Lock;
       Owner^.RemoveView(@Self);                      { Remove from list }
       Owner^.InsertView(@Self, Target);              { Insert into list }
       State := State OR sfVisible;                   { Allow drawing again }
       If (LastView <> Target) Then
         DrawShow(LastView);
       If (Options AND ofSelectable <> 0) Then        { View is selectable }
         begin
           Owner^.ResetCurrent;  { Reset current }
           Owner^.ResetCursor;
         end;
       Owner^.Unlock;
     End;
END;

{--TView--------------------------------------------------------------------}
{  SetCommands -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB       }
{---------------------------------------------------------------------------}
PROCEDURE TView.SetCommands (Commands: TCommandSet);
BEGIN
   CommandSetChanged := CommandSetChanged OR
     (CurCommandSet <> Commands);                     { Set change flag }
   CurCommandSet := Commands;                         { Set command set }
END;

{--TView--------------------------------------------------------------------}
{  EnableCommands -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB    }
{---------------------------------------------------------------------------}
PROCEDURE TView.EnableCommands (Commands: TCommandSet);
BEGIN
   CommandSetChanged := CommandSetChanged OR
     (CurCommandSet * Commands <> Commands);          { Set changed flag }
   CurCommandSet := CurCommandSet + Commands;         { Update command set }
END;

{--TView--------------------------------------------------------------------}
{  DisableCommands -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB   }
{---------------------------------------------------------------------------}
PROCEDURE TView.DisableCommands (Commands: TCommandSet);
BEGIN
   CommandSetChanged := CommandSetChanged OR
     (CurCommandSet * Commands <> []);                { Set changed flag }
   CurCommandSet := CurCommandSet - Commands;         { Update command set }
END;

{--TView--------------------------------------------------------------------}
{  SetState -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 23Sep99 LdB          }
{---------------------------------------------------------------------------}
PROCEDURE TView.SetState (AState: Word; Enable: Boolean);
var
  Command: Word;
  OState : Word;
begin
  OState:=State;
  if Enable then
    State := State or AState
  else
    State := State and not AState;
  if Owner <> nil then
    case AState of
      sfVisible:
        begin
          if Owner^.State and sfExposed <> 0 then
            SetState(sfExposed, Enable);
          if Enable then
            DrawShow(nil)
          else
            DrawHide(nil);
          if Options and ofSelectable <> 0 then
            Owner^.ResetCurrent;
        end;
      sfCursorVis,
      sfCursorIns:
        TView.DrawCursor;
      sfShadow:
        DrawUnderView(True, nil);
      sfFocused:
        begin
          ResetCursor;
          if Enable then
            Command := cmReceivedFocus
          else
            Command := cmReleasedFocus;
          Message(Owner, evBroadcast, Command, @Self);
        end;
    end;
  if ((OState xor State) and (sfCursorVis+sfCursorIns+sfFocused))<>0 then
    CursorChanged;
end;


{--TView--------------------------------------------------------------------}
{  SetCmdState -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB       }
{---------------------------------------------------------------------------}
PROCEDURE TView.SetCmdState (Commands: TCommandSet; Enable: Boolean);
BEGIN
   If Enable Then EnableCommands(Commands)            { Enable commands }
     Else DisableCommands(Commands);                  { Disable commands }
END;

{--TView--------------------------------------------------------------------}
{  GetData -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB           }
{---------------------------------------------------------------------------}
PROCEDURE TView.GetData (Var Rec);
BEGIN                                                 { Abstract method }
END;

{--TView--------------------------------------------------------------------}
{  SetData -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB           }
{---------------------------------------------------------------------------}
PROCEDURE TView.SetData (Var Rec);
BEGIN                                                 { Abstract method }
END;

{--TView--------------------------------------------------------------------}
{  Store -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 06May98 LdB             }
{---------------------------------------------------------------------------}
PROCEDURE TView.Store (Var S: TStream);
VAR SaveState: Word;
    i: integer;
BEGIN
   SaveState := State;                                { Hold current state }
   State := State AND NOT (sfActive OR sfSelected OR
     sfFocused OR sfExposed);                         { Clear flags }
   i:=Origin.X;S.Write(i, SizeOf(i));                 { Write view x origin }
   i:=Origin.Y;S.Write(i, SizeOf(i));                 { Write view y origin }
   i:=Size.X;S.Write(i, SizeOf(i));                   { Write view x size }
   i:=Size.Y;S.Write(i, SizeOf(i));                   { Write view y size }
   i:=Cursor.X;S.Write(i, SizeOf(i));                 { Write cursor x size }
   i:=Cursor.Y;S.Write(i, SizeOf(i));                 { Write cursor y size }
   S.Write(GrowMode, SizeOf(GrowMode));               { Write growmode flags }
   S.Write(DragMode, SizeOf(DragMode));               { Write dragmode flags }
   S.Write(HelpCtx, SizeOf(HelpCtx));                 { Write help context }
   S.Write(State, SizeOf(State));                     { Write state masks }
   S.Write(Options, SizeOf(Options));                 { Write options masks }
   S.Write(Eventmask, SizeOf(Eventmask));             { Write event masks }
   State := SaveState;                                { Reset state masks }
END;

{--TView--------------------------------------------------------------------}
{  Locate -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 24Sep99 LdB            }
{---------------------------------------------------------------------------}
PROCEDURE TView.Locate (Var Bounds: TRect);
VAR
    Min, Max: TPoint; R: TRect;

   FUNCTION Range(Val, Min, Max: Sw_Integer): Sw_Integer;
   BEGIN
     If (Val < Min) Then Range := Min Else            { Value to small }
       If (Val > Max) Then Range := Max Else          { Value to large }
         Range := Val;                                { Value is okay }
   END;

BEGIN
   SizeLimits(Min, Max);                              { Get size limits }
   Bounds.B.X := Bounds.A.X + Range(Bounds.B.X -
     Bounds.A.X, Min.X, Max.X);                       { X bound limit }
   Bounds.B.Y := Bounds.A.Y + Range(Bounds.B.Y
     - Bounds.A.Y, Min.Y, Max.Y);                     { Y bound limit }
   GetBounds(R);                                      { Current bounds }
   If NOT Bounds.Equals(R) Then Begin                 { Size has changed }
     ChangeBounds(Bounds);                            { Change bounds }
     If (State AND sfVisible <> 0) AND                { View is visible }
     (State AND sfExposed <> 0) AND (Owner <> Nil)    { Check view exposed }
       Then
      begin
        if State and sfShadow <> 0 then
          begin
            R.Union(Bounds);
            Inc(R.B.X, ShadowSize.X);
            Inc(R.B.Y, ShadowSize.Y);
          end;
        DrawUnderRect(R, nil);
      end;
   End;
END;

{--TView--------------------------------------------------------------------}
{  KeyEvent -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB          }
{---------------------------------------------------------------------------}
PROCEDURE TView.KeyEvent (Var Event: TEvent);
BEGIN
   Repeat
     GetEvent(Event);                                 { Get next event }
   Until (Event.What = evKeyDown);                    { Wait till keydown }
END;

{--TView--------------------------------------------------------------------}
{  GetEvent -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB          }
{---------------------------------------------------------------------------}
PROCEDURE TView.GetEvent (Var Event: TEvent);
BEGIN
  If (Owner <> Nil) Then Owner^.GetEvent(Event);      { Event from owner }
END;

{--TView--------------------------------------------------------------------}
{  PutEvent -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB          }
{---------------------------------------------------------------------------}
PROCEDURE TView.PutEvent (Var Event: TEvent);
BEGIN
   If (Owner <> Nil) Then Owner^.PutEvent(Event);     { Put in owner }
END;

{--TView--------------------------------------------------------------------}
{  GetExtent -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB         }
{---------------------------------------------------------------------------}
PROCEDURE TView.GetExtent (Var Extent: TRect);
BEGIN
   Extent.A.X := 0;                                   { Zero x field }
   Extent.A.Y := 0;                                   { Zero y field }
   Extent.B.X := Size.X;                              { Return x size }
   Extent.B.Y := Size.Y;                              { Return y size }
END;

{--TView--------------------------------------------------------------------}
{  GetBounds -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB         }
{---------------------------------------------------------------------------}
PROCEDURE TView.GetBounds (Var Bounds: TRect);
BEGIN
   Bounds.A := Origin;                                { Get first corner }
   Bounds.B.X := Origin.X + Size.X;                   { Calc corner x value }
   Bounds.B.Y := Origin.Y + Size.Y;                   { Calc corner y value }
END;

{--TView--------------------------------------------------------------------}
{  SetBounds -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 24Sep99 LdB         }
{---------------------------------------------------------------------------}
procedure TView.SetBounds(var Bounds: TRect);
begin
  Origin := Bounds.A;                                { Get first corner }
  Size := Bounds.B;                                 { Get second corner }
  Dec(Size.X,Origin.X);
  Dec(Size.Y,Origin.Y);
end;

{--TView--------------------------------------------------------------------}
{  GetClipRect -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB       }
{---------------------------------------------------------------------------}
PROCEDURE TView.GetClipRect (Var Clip: TRect);
BEGIN
   GetBounds(Clip);                                   { Get current bounds }
   If (Owner <> Nil) Then Clip.Intersect(Owner^.Clip);{ Intersect with owner }
   Clip.Move(-Origin.X, -Origin.Y);                   { Sub owner origin }
END;

{--TView--------------------------------------------------------------------}
{  ClearEvent -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB        }
{---------------------------------------------------------------------------}
PROCEDURE TView.ClearEvent (Var Event: TEvent);
BEGIN
   Event.What := evNothing;                           { Clear the event }
   Event.InfoPtr := @Self;                            { Set us as handler }
END;

{--TView--------------------------------------------------------------------}
{  HandleEvent -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB       }
{---------------------------------------------------------------------------}
PROCEDURE TView.HandleEvent (Var Event: TEvent);
BEGIN
   If (Event.What = evMouseDown) Then                 { Mouse down event }
     If (State AND (sfSelected OR sfDisabled) = 0)    { Not selected/disabled }
       AND (Options AND ofSelectable <> 0) Then       { View is selectable }
       If (Focus = False) OR                          { Not view with focus }
         (Options AND ofFirstClick = 0)               { Not 1st click select }
           Then ClearEvent(Event);                    { Handle the event }
END;

{--TView--------------------------------------------------------------------}
{  ChangeBounds -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB      }
{---------------------------------------------------------------------------}
PROCEDURE TView.ChangeBounds (Var Bounds: TRect);
BEGIN
   SetBounds(Bounds);                                 { Set new bounds }
   DrawView;                                          { Draw the view }
END;

{--TView--------------------------------------------------------------------}
{  SizeLimits -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB        }
{---------------------------------------------------------------------------}
PROCEDURE TView.SizeLimits (Var Min, Max: TPoint);
BEGIN
   Min.X := 0;                                        { Zero x minimum }
   Min.Y := 0;                                        { Zero y minimum }
   If (Owner <> Nil) and(Owner^.ClipChilds) Then
     Max := Owner^.Size
   else                         { Max owner size }
    Begin
     Max.X := high(sw_integer);                      { Max possible x size }
     Max.Y := high(sw_integer);                        { Max possible y size }
   End;
END;

{--TView--------------------------------------------------------------------}
{  GetCommands -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB       }
{---------------------------------------------------------------------------}
PROCEDURE TView.GetCommands (Var Commands: TCommandSet);
BEGIN
   Commands := CurCommandSet;                         { Return command set }
END;

{--TView--------------------------------------------------------------------}
{  GetPeerViewPtr -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB    }
{---------------------------------------------------------------------------}
PROCEDURE TView.GetPeerViewPtr (Var S: TStream; Var P);
VAR Index: Integer;
BEGIN
   Index := 0;                                        { Zero index value }
   S.Read(Index, SizeOf(Index));                      { Read view index }
   If (Index = 0) OR (OwnerGroup = Nil) Then          { Check for peer views }
     Pointer(P) := Nil Else Begin                     { Return nil }
       Pointer(P) := FixupList^[Index];               { New view ptr }
       FixupList^[Index] := @P;                       { Patch this pointer }
     End;
END;

{--TView--------------------------------------------------------------------}
{  PutPeerViewPtr -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB    }
{---------------------------------------------------------------------------}
PROCEDURE TView.PutPeerViewPtr (Var S: TStream; P: PView);
VAR Index: Integer;
BEGIN
   If (P = Nil) OR (OwnerGroup = Nil) Then Index := 0 { Return zero index }
     Else Index := OwnerGroup^.IndexOf(P);            { Return view index }
   S.Write(Index, SizeOf(Index));                     { Write the index }
END;

{--TView--------------------------------------------------------------------}
{  CalcBounds -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB        }
{---------------------------------------------------------------------------}
PROCEDURE TView.CalcBounds (Var Bounds: Objects.TRect; Delta: TPoint);
VAR S, D: Sw_Integer; Min, Max: TPoint;

   FUNCTION Range (Val, Min, Max: Sw_Integer): Sw_Integer;
   BEGIN
     If (Val < Min) Then Range := Min Else            { Value below min }
     If (Val > Max) Then Range := Max Else            { Value above max }
       Range := Val;                                  { Accept value }
   END;

   PROCEDURE GrowI (Var I: Sw_Integer);
   BEGIN
     If (GrowMode AND gfGrowRel = 0) Then Inc(I, D)
       Else I := (I * S + (S - D) SHR 1) DIV (S - D); { Calc grow value }
   END;

BEGIN
   GetBounds(Bounds);                                 { Get bounds }
   If (GrowMode = 0) Then Exit;                       { No grow flags exits }
   S := Owner^.Size.X;                                { Set initial size }
   D := Delta.X;                                      { Set initial delta }
   If (GrowMode AND gfGrowLoX <> 0) Then
     GrowI(Bounds.A.X);                                { Grow left side }
   If (GrowMode AND gfGrowHiX <> 0) Then
     GrowI(Bounds.B.X);                                { Grow right side }
   If (Bounds.B.X - Bounds.A.X > MaxViewWidth) Then
     Bounds.B.X := Bounds.A.X + MaxViewWidth;         { Check values }
   S := Owner^.Size.Y; D := Delta.Y;                  { set initial values }
   If (GrowMode AND gfGrowLoY <> 0) Then
     GrowI(Bounds.A.Y);                                { Grow top side }
   If (GrowMode AND gfGrowHiY <> 0) Then
     GrowI(Bounds.B.Y);                                { grow lower side }
   SizeLimits(Min, Max);                              { Check sizes }
   Bounds.B.X := Bounds.A.X + Range(Bounds.B.X -
     Bounds.A.X, Min.X, Max.X);                       { Set right side }
   Bounds.B.Y := Bounds.A.Y + Range(Bounds.B.Y -
     Bounds.A.Y, Min.Y, Max.Y);                       { Set lower side }
END;

{***************************************************************************}
{                       TView OBJECT PRIVATE METHODS                        }
{***************************************************************************}

{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{                          TGroup OBJECT METHODS                            }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}

{--TGroup-------------------------------------------------------------------}
{  Init -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 15Jul99 LdB              }
{---------------------------------------------------------------------------}
CONSTRUCTOR TGroup.Init (Var Bounds: TRect);
BEGIN
   Inherited Init(Bounds);                            { Call ancestor }
   Options := Options OR (ofSelectable + ofBuffered); { Set options }
   GetExtent(Clip);                                   { Get clip extents }
   EventMask := $FFFF;                                { See all events }
END;

{--TGroup-------------------------------------------------------------------}
{  Load -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 15Sep97 LdB              }
{---------------------------------------------------------------------------}
CONSTRUCTOR TGroup.Load (Var S: TStream);
VAR I: Sw_Word;
    Count: Word;
    P, Q: ^Pointer; V: PView; OwnerSave: PGroup;
    FixupSave: PFixupList;
BEGIN
   Inherited Load(S);                                 { Call ancestor }
   GetExtent(Clip);                                   { Get view extents }
   OwnerSave := OwnerGroup;                           { Save current group }
   OwnerGroup := @Self;                               { We are current group }
   FixupSave := FixupList;                            { Save current list }
   Count := 0;                                        { Zero count value }
   S.Read(Count, SizeOf(Count));                      { Read entry count }
   If (MaxAvail >= Count*SizeOf(Pointer)) Then Begin  { Memory available }
     GetMem(FixupList, Count*SizeOf(Pointer));        { List size needed }
     FillChar(FixUpList^, Count*SizeOf(Pointer), #0); { Zero all entries }
     For I := 1 To Count Do Begin
       V := PView(S.Get);                             { Get view off stream }
       If (V <> Nil) Then InsertView(V, Nil);         { Insert valid views }
     End;
     V := Last;                                       { Start on last view }
     For I := 1 To Count Do Begin
       V := V^.Next;                                  { Fetch next view }
       P := FixupList^[I];                            { Transfer pointer }
       While (P <> Nil) Do Begin                      { If valid view }
         Q := P;                                      { Copy pointer }
         P := P^;                                     { Fetch pointer }
         Q^ := V;                                     { Transfer view ptr }
       End;
     End;
     FreeMem(FixupList, Count*SizeOf(Pointer));       { Release fixup list }
   End;
   OwnerGroup := OwnerSave;                           { Reload current group }
   FixupList := FixupSave;                            { Reload current list }
   GetSubViewPtr(S, V);                               { Load any subviews }
   SetCurrent(V, NormalSelect);                       { Select current view }
   If (OwnerGroup = Nil) Then Awaken;                 { If topview activate }
END;

{--TGroup-------------------------------------------------------------------}
{  Done -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB              }
{---------------------------------------------------------------------------}
DESTRUCTOR TGroup.Done;
VAR P, T: PView;
BEGIN
   Hide;                                              { Hide the view }
   P := Last;                                         { Start on last }
   If (P <> Nil) Then Begin                           { Subviews exist }
     Repeat
       P^.Hide;                                       { Hide each view }
       P := P^.Prev;                                  { Prior view }
     Until (P = Last);                                { Loop complete }
     Repeat
       T := P^.Prev;                                  { Hold prior pointer }
       Dispose(P, Done);                              { Dispose subview }
       P := T;                                        { Transfer pointer }
     Until (Last = Nil);                              { Loop complete }
   End;
   Inherited Done;                                    { Call ancestor }
END;

{--TGroup-------------------------------------------------------------------}
{  First -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB             }
{---------------------------------------------------------------------------}
FUNCTION TGroup.First: PView;
BEGIN
   If (Last = Nil) Then First := Nil                  { No first view }
     Else First := Last^.Next;                        { Return first view }
END;

{--TGroup-------------------------------------------------------------------}
{  Execute -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB           }
{---------------------------------------------------------------------------}
FUNCTION TGroup.Execute: Word;
VAR Event: TEvent;
BEGIN
   Repeat
     EndState := 0;                                   { Clear end state }
     Repeat
       GetEvent(Event);                               { Get next event }
       HandleEvent(Event);                            { Handle the event }
       If (Event.What <> evNothing) Then
         EventError(Event);                           { Event not handled }
     Until (EndState <> 0);                           { Until command set }
   Until Valid(EndState);                             { Repeat until valid }
   Execute := EndState;                               { Return result }
   EndState := 0;                                     { Clear end state }
END;

{--TGroup-------------------------------------------------------------------}
{  GetHelpCtx -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB        }
{---------------------------------------------------------------------------}
FUNCTION TGroup.GetHelpCtx: Word;
VAR H: Word;
BEGIN
   H := hcNoContext;                                  { Preset no context }
   If (Current <> Nil) Then H := Current^.GetHelpCtx; { Current context }
   If (H=hcNoContext) Then H := Inherited GetHelpCtx; { Call ancestor }
   GetHelpCtx := H;                                   { Return result }
END;

{--TGroup-------------------------------------------------------------------}
{  DataSize -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 15Jul98 LdB          }
{---------------------------------------------------------------------------}
FUNCTION TGroup.DataSize: Sw_Word;
VAR Total: Word; P: PView;
BEGIN
   Total := 0;                                        { Zero totals count }
   P := Last;                                         { Start on last view }
   If (P <> Nil) Then Begin                           { Subviews exist }
     Repeat
       P := P^.Next;                                  { Move to next view }
       Total := Total + P^.DataSize;                  { Add view size }
     Until (P = Last);                                { Until last view }
   End;
   DataSize := Total;                                 { Return data size }
END;

{--TGroup-------------------------------------------------------------------}
{  ExecView -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 15Jul99 LdB          }
{---------------------------------------------------------------------------}
FUNCTION TGroup.ExecView (P: PView): Word;
VAR SaveOptions: Word; SaveTopView, SaveCurrent: PView; SaveOwner: PGroup;
    SaveCommands: TCommandSet;
BEGIN
   If (P<>Nil) Then Begin
     SaveOptions := P^.Options;                       { Hold options }
     SaveOwner := P^.Owner;                           { Hold owner }
     SaveTopView := TheTopView;                       { Save topmost view }
     SaveCurrent := Current;                          { Save current view }
     GetCommands(SaveCommands);                       { Save commands }
     TheTopView := P;                                 { Set top view }
     P^.Options := P^.Options AND NOT ofSelectable;   { Not selectable }
     P^.SetState(sfModal, True);                      { Make modal }
     SetCurrent(P, EnterSelect);                      { Select next }
     If (SaveOwner = Nil) Then Insert(P);             { Insert view }
     ExecView := P^.Execute;                          { Execute view }
     If (SaveOwner = Nil) Then Delete(P);             { Remove view }
     SetCurrent(SaveCurrent, LeaveSelect);            { Unselect current }
     P^.SetState(sfModal, False);                     { Clear modal state }
     P^.Options := SaveOptions;                       { Restore options }
     TheTopView := SaveTopView;                       { Restore topview }
     SetCommands(SaveCommands);                       { Restore commands }
   End Else ExecView := cmCancel;                     { Return cancel }
END;

{ ********************************* REMARK ******************************** }
{    This call really is very COMPILER SPECIFIC and really can't be done    }
{    effectively any other way but assembler code as SELF & FRAMES need     }
{    to be put down in exact order and OPTIMIZERS make a mess of it.        }
{ ******************************** END REMARK *** Leon de Boer, 17Jul99 *** }

{--TGroup-------------------------------------------------------------------}
{  FirstThat -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 17Jul99 LdB         }
{---------------------------------------------------------------------------}
FUNCTION TGroup.FirstThat (P: Pointer): PView;
VAR
  Tp : PView;
BEGIN
  If (Last<>Nil) Then
   Begin
     Tp := Last;                                      { Set temporary ptr }
     Repeat
       Tp := Tp^.Next;                                { Get next view }
       IF Byte(Longint(CallPointerMethodLocal(P,get_caller_frame(get_frame),@self,Tp)))<>0 THEN
        Begin       { Test each view }
          FirstThat := Tp;                             { View returned true }
          Exit;                                        { Now exit }
        End;
     Until (Tp=Last);                                 { Until last }
     FirstThat := Nil;                                { None passed test }
   End
  Else
   FirstThat := Nil;                         { Return nil }
END;

{--TGroup-------------------------------------------------------------------}
{  Valid -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB             }
{---------------------------------------------------------------------------}
FUNCTION TGroup.Valid (Command: Word): Boolean;

   FUNCTION IsInvalid (P: PView): Boolean;
   BEGIN
     IsInvalid := NOT P^.Valid(Command);              { Check if valid }
   END;

BEGIN
   Valid := True;                                     { Preset valid }
   If (Command = cmReleasedFocus) Then Begin          { Release focus cmd }
     If (Current <> Nil) AND                          { Current view exists }
       (Current^.Options AND ofValidate <> 0) Then    { Validating view }
         Valid := Current^.Valid(Command);            { Validate command }
   End Else Valid := FirstThat(@IsInvalid) = Nil;     { Check first valid }
END;

{--TGroup-------------------------------------------------------------------}
{  FocusNext -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB         }
{---------------------------------------------------------------------------}
FUNCTION TGroup.FocusNext (Forwards: Boolean): Boolean;
VAR P: PView;
BEGIN
   P := FindNext(Forwards);                           { Find next view }
   FocusNext := True;                                 { Preset true }
   If (P <> Nil) Then FocusNext := P^.Focus;          { Check next focus }
END;


procedure TGroup.DrawSubViews(P, Bottom: PView);
begin
  if P <> nil then
   while P <> Bottom do
    begin
      P^.DrawView;
      P := P^.NextView;
    end;
end;


{--TGroup-------------------------------------------------------------------}
{  ReDraw -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 17Sep97 LdB              }
{---------------------------------------------------------------------------}
procedure TGroup.Redraw;
begin
  DrawSubViews(First, nil);
end;


PROCEDURE TGroup.ResetCursor;
BEGIN
  if (Current<>nil) then
    Current^.ResetCursor;
END;


{--TGroup-------------------------------------------------------------------}
{  Awaken -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 15Sep97 LdB            }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.Awaken;

   PROCEDURE DoAwaken (P: PView);
   BEGIN
     If (P <> Nil) Then P^.Awaken;                    { Awaken view }
   END;

BEGIN
   ForEach(@DoAwaken);                                { Awaken each view }
END;

{--TGroup-------------------------------------------------------------------}
{  Draw -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 17Sep97 LdB              }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.Draw;
BEGIN
   If Buffer=Nil then
     ReDraw
   else
     WriteBuf(0,0,Size.X,Size.Y,Buffer);
END;


{--TGroup-------------------------------------------------------------------}
{  SelectDefaultView -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 22Oct99 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.SelectDefaultView;
VAR P: PView;
BEGIN
   P := Last;                                         { Start at last }
   While (P <> Nil) Do Begin
     If P^.GetState(sfDefault) Then Begin             { Search 1st default }
       P^.Select;                                     { Select default view }
       P := Nil;                                      { Force kick out }
     End Else P := P^.PrevView;                       { Prior subview }
   End;
END;


function TGroup.ClipChilds: boolean;
begin
  ClipChilds:=true;
end;


procedure TGroup.BeforeInsert(P: PView);
begin
  { abstract }
end;

procedure TGroup.AfterInsert(P: PView);
begin
  { abstract }
end;

procedure TGroup.BeforeDelete(P: PView);
begin
  { abstract }
end;

procedure TGroup.AfterDelete(P: PView);
begin
  { abstract }
end;

{--TGroup-------------------------------------------------------------------}
{  Insert -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 29Sep99 LdB            }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.Insert (P: PView);
BEGIN
  BeforeInsert(P);
  InsertBefore(P, First);
  AfterInsert(P);
END;

{--TGroup-------------------------------------------------------------------}
{  Delete -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB            }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.Delete (P: PView);
VAR SaveState: Word;
BEGIN
   BeforeDelete(P);
   SaveState := P^.State;                             { Save state }
   P^.Hide;                                           { Hide the view }
   RemoveView(P);                                     { Remove the view }
   P^.Owner := Nil;                                   { Clear owner ptr }
   P^.Next := Nil;                                    { Clear next ptr }
   if SaveState and sfVisible <> 0 then
     P^.Show;
   AfterDelete(P);
END;

{ ********************************* REMARK ******************************** }
{    This call really is very COMPILER SPECIFIC and really can't be done    }
{    effectively any other way but assembler code as SELF & FRAMES need     }
{    to be put down in exact order and OPTIMIZERS make a mess of it.        }
{ ******************************** END REMARK *** Leon de Boer, 17Jul99 *** }

{--TGroup-------------------------------------------------------------------}
{  ForEach -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 17Jul99 LdB           }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.ForEach (P: Pointer);
VAR
  Tp,Hp,L0 : PView;
{ Vars Hp and L0 are necessary to hold original pointers in case   }
{ when some view closes himself as a result of broadcast message ! }
BEGIN
  If (Last<>Nil) Then
   Begin
     Tp:=Last;
     Hp:=Tp^.Next;
     L0:=Last;              { Set temporary ptr }
     Repeat
       Tp:=Hp;
       if tp=nil then
        exit;
       Hp:=Tp^.Next;                        { Get next view }
       CallPointerMethodLocal(P,get_caller_frame(get_frame),@self,Tp);
     Until (Tp=L0);                                   { Until last }
   End;
END;



{--TGroup-------------------------------------------------------------------}
{  EndModal -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB          }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.EndModal (Command: Word);
BEGIN
   If (State AND sfModal <> 0) Then                   { This view is modal }
     EndState := Command Else                         { Set endstate }
     Inherited EndModal(Command);                     { Call ancestor }
END;

{--TGroup-------------------------------------------------------------------}
{  SelectNext -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 15Sep97 LdB        }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.SelectNext (Forwards: Boolean);
VAR P: PView;
BEGIN
   P := FindNext(Forwards);                           { Find next view }
   If (P <> Nil) Then P^.Select;                      { Select view }
END;

{--TGroup-------------------------------------------------------------------}
{  InsertBefore -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 29Sep99 LdB      }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.InsertBefore (P, Target: PView);
VAR SaveState : Word;
BEGIN
   If (P <> Nil) AND (P^.Owner = Nil) AND             { View valid }
   ((Target = Nil) OR (Target^.Owner = @Self))        { Target valid }
   Then Begin
     If (P^.Options AND ofCenterX <> 0) Then     { Centre on x axis }
       P^.Origin.X := (Size.X - P^.Size.X) div 2;
     If (P^.Options AND ofCenterY <> 0) Then     { Centre on y axis }
       P^.Origin.Y := (Size.Y - P^.Size.Y) div 2;
     SaveState := P^.State;                           { Save view state }
     P^.Hide;                                         { Make sure hidden }
     InsertView(P, Target);                           { Insert into list }
     If (SaveState AND sfVisible <> 0) Then P^.Show;  { Show the view }
     If (State AND sfActive <> 0) Then                { Was active before }
       P^.SetState(sfActive , True);                  { Make active again }
   End;
END;

{--TGroup-------------------------------------------------------------------}
{  SetState -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB          }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.SetState (AState: Word; Enable: Boolean);

    PROCEDURE DoSetState (P: PView);
    BEGIN
      If (P <> Nil) Then P^.SetState(AState, Enable); { Set subview state }
    END;

    PROCEDURE DoExpose (P: PView);
    BEGIN
      If (P <> Nil) Then Begin
        If (P^.State AND sfVisible <> 0) Then         { Check view visible }
          P^.SetState(sfExposed, Enable);             { Set exposed flag }
      End;
    END;

BEGIN
   Inherited SetState(AState, Enable);                { Call ancestor }
   Case AState Of
     sfActive, sfDragging: Begin
         Lock;                                        { Lock the view }
         ForEach(@DoSetState);                        { Set each subview }
         UnLock;                                      { Unlock the view }
       End;
     sfFocused: Begin
         If (Current <> Nil) Then
           Current^.SetState(sfFocused, Enable);          { Focus current view }
       End;
     sfExposed: Begin
         ForEach(@DoExpose);                          { Expose each subview }
       End;
   End;
END;

{--TGroup-------------------------------------------------------------------}
{  GetData -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 29Mar98 LdB           }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.GetData (Var Rec);
VAR Total: Sw_Word; P: PView;
BEGIN
   Total := 0;                                        { Clear total }
   P := Last;                                         { Start at last }
   While (P <> Nil) Do Begin                          { Subviews exist }
     P^.GetData(TByteArray(Rec)[Total]);              { Get data }
     Inc(Total, P^.DataSize);                         { Increase total }
     P := P^.PrevView;                                { Previous view }
   End;
END;

{--TGroup-------------------------------------------------------------------}
{  SetData -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 29Mar98 LdB           }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.SetData (Var Rec);
VAR Total: Sw_Word; P: PView;
BEGIN
   Total := 0;                                        { Clear total }
   P := Last;                                         { Start at last }
   While (P <> Nil) Do Begin                          { Subviews exist }
     P^.SetData(TByteArray(Rec)[Total]);              { Get data }
     Inc(Total, P^.DataSize);                         { Increase total }
     P := P^.PrevView;                                { Previous view }
   End;
END;

{--TGroup-------------------------------------------------------------------}
{  Store -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 30Mar98 LdB             }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.Store (Var S: TStream);
VAR Count: Word; OwnerSave: PGroup;

   PROCEDURE DoPut (P: PView);
   BEGIN
     S.Put(P);                                        { Put view on stream }
   END;

BEGIN
   TView.Store(S);                                    { Call view store }
   OwnerSave := OwnerGroup;                           { Save ownergroup }
   OwnerGroup := @Self;                               { Set as owner group }
   Count := IndexOf(Last);                            { Subview count }
   S.Write(Count, SizeOf(Count));                     { Write the count }
   ForEach(@DoPut);                                   { Put each in stream }
   PutSubViewPtr(S, Current);                         { Current on stream }
   OwnerGroup := OwnerSave;                           { Restore ownergroup }
END;

{--TGroup-------------------------------------------------------------------}
{  EventError -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB        }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.EventError (Var Event: TEvent);
BEGIN
   If (Owner <> Nil) Then Owner^.EventError(Event);   { Event error }
END;

{--TGroup-------------------------------------------------------------------}
{  HandleEvent -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB       }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.HandleEvent (Var Event: TEvent);

   FUNCTION ContainsMouse (P: PView): Boolean;
   BEGIN
     ContainsMouse := (P^.State AND sfVisible <> 0)   { Is view visible }
       AND P^.MouseInView(Event.Where);               { Is point in view }
   END;

   PROCEDURE DoHandleEvent (P: PView);
   BEGIN
     If (P = Nil) OR ((P^.State AND sfDisabled <> 0) AND
       (Event.What AND(PositionalEvents OR FocusedEvents) <>0 ))
        Then Exit;                                     { Invalid/disabled }
     Case Phase Of
       phPreProcess: If (P^.Options AND ofPreProcess = 0)
         Then Exit;                                   { Not pre processing }
       phPostProcess: If (P^.Options AND ofPostProcess = 0)
         Then Exit;                                   { Not post processing }
     End;
     If (Event.What AND P^.EventMask <> 0) Then       { View handles event }
       P^.HandleEvent(Event);                         { Pass to view }
   END;

BEGIN
   Inherited HandleEvent(Event);                      { Call ancestor }
   If (Event.What = evNothing) Then Exit;             { No valid event exit }
   If (Event.What AND FocusedEvents <> 0) Then Begin  { Focused event }
     Phase := phPreProcess;                           { Set pre process }
     ForEach(@DoHandleEvent);                         { Pass to each view }
     Phase := phFocused;                              { Set focused }
     DoHandleEvent(Current);                          { Pass to current }
     Phase := phPostProcess;                          { Set post process }
     ForEach(@DoHandleEvent);                         { Pass to each }
   End Else Begin
     Phase := phFocused;                              { Set focused }
     If (Event.What AND PositionalEvents <> 0) Then   { Positional event }
       DoHandleEvent(FirstThat(@ContainsMouse))       { Pass to first }
       Else ForEach(@DoHandleEvent);                  { Pass to all }
   End;
END;

{--TGroup-------------------------------------------------------------------}
{  ChangeBounds -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 30Jul99 LdB      }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.ChangeBounds (Var Bounds: TRect);
VAR D: TPoint;

   PROCEDURE DoCalcChange (P: PView);
   VAR R: TRect;
   BEGIN
     P^.CalcBounds(R, D);                             { Calc view bounds }
     P^.ChangeBounds(R);                              { Change view bounds }
   END;

BEGIN
   D.X := Bounds.B.X - Bounds.A.X - Size.X;           { Delta x value }
   D.Y := Bounds.B.Y - Bounds.A.Y - Size.Y;           { Delta y value }
   If ((D.X=0) AND (D.Y=0)) Then Begin
     SetBounds(Bounds);                               { Set new bounds }
     { Force redraw }
     ReDraw;                                        { Draw the view }
   End Else Begin
     SetBounds(Bounds);                               { Set new bounds }
     GetExtent(Clip);                                 { Get new clip extents }
     Lock;                                            { Lock drawing }
     ForEach(@DoCalcChange);                          { Change each view }
     UnLock;                                          { Unlock drawing }
   End;
END;

{--TGroup-------------------------------------------------------------------}
{  GetSubViewPtr -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 20May98 LdB     }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.GetSubViewPtr (Var S: TStream; Var P);
VAR Index, I: Sw_Word; Q: PView;
BEGIN
   Index := 0;                                        { Zero index value }
   S.Read(Index, SizeOf(Index));                      { Read view index }
   If (Index > 0) Then Begin                          { Valid index }
     Q := Last;                                       { Start on last }
     For I := 1 To Index Do Q := Q^.Next;             { Loop for count }
     Pointer(P) := Q;                                 { Return the view }
   End Else Pointer(P) := Nil;                        { Return nil }
END;

{--TGroup-------------------------------------------------------------------}
{  PutSubViewPtr -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 20May98 LdB     }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.PutSubViewPtr (Var S: TStream; P: PView);
VAR Index: Sw_Word;
BEGIN
   If (P = Nil) Then Index := 0 Else                  { Nil view, Index = 0 }
     Index := IndexOf(P);                             { Calc view index }
   S.Write(Index, SizeOf(Index));                     { Write the index }
END;


{***************************************************************************}
{                       TGroup OBJECT PRIVATE METHODS                       }
{***************************************************************************}

{--TGroup-------------------------------------------------------------------}
{  IndexOf -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB           }
{---------------------------------------------------------------------------}
FUNCTION TGroup.IndexOf (P: PView): Sw_Integer;
VAR I: Sw_Integer; Q: PView;
BEGIN
   Q := Last;                                         { Start on last view }
   If (Q <> Nil) Then Begin                           { Subviews exist }
     I := 1;                                          { Preset value }
     While (Q <> P) AND (Q^.Next <> Last) Do Begin
       Q := Q^.Next;                                  { Load next view }
       Inc(I);                                        { Increment count }
     End;
     If (Q <> P) Then IndexOf := 0 Else IndexOf := I; { Return index }
   End Else IndexOf := 0;                             { Return zero }
END;

{--TGroup-------------------------------------------------------------------}
{  FindNext -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 23Sep99 LdB          }
{---------------------------------------------------------------------------}
FUNCTION TGroup.FindNext (Forwards: Boolean): PView;
VAR P: PView;
BEGIN
   FindNext := Nil;                                   { Preset nil return }
   If (Current <> Nil) Then Begin                     { Has current view }
     P := Current;                                    { Start on current }
     Repeat
       If Forwards Then P := P^.Next                  { Get next view }
         Else P := P^.Prev;                           { Get prev view }
     Until ((P^.State AND (sfVisible+sfDisabled) = sfVisible) AND
            (P^.Options AND ofSelectable <> 0)) OR          { Tab selectable }
     (P = Current);                                   { Not singular select }
     If (P <> Current) Then FindNext := P;            { Return result }
   End;
END;

{--TGroup-------------------------------------------------------------------}
{  FirstMatch -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB        }
{---------------------------------------------------------------------------}
FUNCTION TGroup.FirstMatch (AState: Word; AOptions: Word): PView;

   FUNCTION Matches (P: PView): Boolean;
   BEGIN
     Matches := (P^.State AND AState = AState) AND
       (P^.Options AND AOptions = AOptions);          { Return match state }
   END;

BEGIN
   FirstMatch := FirstThat(@Matches);                 { Return first match }
END;

{--TGroup-------------------------------------------------------------------}
{  ResetCurrent -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB      }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.ResetCurrent;
BEGIN
   SetCurrent(FirstMatch(sfVisible, ofSelectable),
     NormalSelect);                                   { Reset current view }
END;

{--TGroup-------------------------------------------------------------------}
{  RemoveView -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB        }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.RemoveView (P: PView);
VAR Q: PView;
BEGIN
   If (P <> Nil) AND (Last <> Nil) Then Begin         { Check view is valid }
     Q := Last;                                       { Start on last view }
     While (Q^.Next <> P) AND (Q^.Next <> Last) Do
       Q := Q^.Next;                                  { Find prior view }
     If (Q^.Next = P) Then Begin                      { View found }
       If (Q^.Next <> Q) Then Begin                   { Not only view }
         Q^.Next := P^.Next;                          { Rechain views }
         If (P = Last) Then Last := P^.Next;          { Fix if last removed }
       End Else Last := Nil;                          { Only view }
     End;
   End;
END;

{--TGroup-------------------------------------------------------------------}
{  InsertView -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB        }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.InsertView (P, Target: PView);
BEGIN
   If (P <> Nil) Then Begin                           { Check view is valid }
     P^.Owner := @Self;                               { Views owner is us }
     If (Target <> Nil) Then Begin                    { Valid target }
       Target := Target^.Prev;                        { 1st part of chain }
       P^.Next := Target^.Next;                       { 2nd part of chain }
       Target^.Next := P;                             { Chain completed }
     End Else Begin
       If (Last <> Nil) Then Begin                    { Not first view }
         P^.Next := Last^.Next;                       { 1st part of chain }
         Last^.Next := P;                             { Completed chain }
       End Else P^.Next := P;                         { 1st chain to self }
       Last := P;                                     { P is now last }
     End;
   End;
END;

{--TGroup-------------------------------------------------------------------}
{  SetCurrent -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 23Sep99 LdB        }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.SetCurrent (P: PView; Mode: SelectMode);

   PROCEDURE SelectView (P: PView; Enable: Boolean);
   BEGIN
     If (P <> Nil) Then                               { View is valid }
       P^.SetState(sfSelected, Enable);               { Select the view }
   END;

   PROCEDURE FocusView (P: PView; Enable: Boolean);
   BEGIN
     If (State AND sfFocused <> 0) AND (P <> Nil)     { Check not focused }
       Then P^.SetState(sfFocused, Enable);           { Focus the view }
   END;

BEGIN
   If (Current<>P) Then Begin                         { Not already current }
     Lock;                                            { Stop drawing }
     FocusView(Current, False);                       { Defocus current }
     If (Mode <> EnterSelect) Then
       SelectView(Current, False);                    { Deselect current }
     If (Mode<>LeaveSelect) Then SelectView(P, True); { Select view P }
     FocusView(P, True);                              { Focus view P }
     Current := P;                                    { Set as current view }
     UnLock;                                          { Redraw now }
   End;
END;

{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{                           TFrame OBJECT METHODS                           }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}

{--TFrame-------------------------------------------------------------------}
{  Init -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 30Jul99 LdB              }
{---------------------------------------------------------------------------}
CONSTRUCTOR TFrame.Init (Var Bounds: TRect);
BEGIN
   Inherited Init(Bounds);                            { Call ancestor }
   GrowMode := gfGrowHiX + gfGrowHiY;                 { Set grow modes }
   EventMask := EventMask OR evBroadcast;             { See broadcasts }
END;

procedure TFrame.FrameLine(var FrameBuf; Y, N: Sw_Integer; Color: Byte);
const
  InitFrame: array[0..17] of Byte =
    ($06, $0A, $0C, $05, $00, $05, $03, $0A, $09,
     $16, $1A, $1C, $15, $00, $15, $13, $1A, $19);
  FrameChars_437: array[0..31] of Char =
    '   À ³Úà ÙÄÁ¿´ÂÅ   È ºÉÇ ¼ÍÏ»¶ÑÎ';
  FrameChars_850: array[0..31] of Char =
    '   À ³Úà ÙÄÁ¿´ÂÅ   È ºÉº ¼ÍÍ»ºÍÎ';
var
  FrameMask : array[0..MaxViewWidth-1] of Byte;
  ColorMask : word;
  i,j,k     : {Sw_  lo and hi are used !! }integer;
  CurrView  : PView;
  p         : Pchar;
begin
  FrameMask[0]:=InitFrame[n];
  FillChar(FrameMask[1],Size.X-2,InitFrame[n+1]);
  FrameMask[Size.X-1]:=InitFrame[n+2];
  CurrView:=Owner^.Last^.Next;
  while (CurrView<>@Self) do
   begin
     if ((CurrView^.Options and ofFramed)<>0) and
        ((CurrView^.State and sfVisible)<>0) then
      begin
        i:=Y-CurrView^.Origin.Y;
        if (i<0) then
         begin
           inc(i);
           if i=0 then
            i:=$0a06
           else
            i:=0;
         end
        else
         begin
           if i<CurrView^.Size.Y then
            i:=$0005
           else
            if i=CurrView^.Size.Y then
             i:=$0a03
           else
            i:=0;
         end;
        if (i<>0) then
         begin
           j:=CurrView^.Origin.X;
           k:=CurrView^.Size.X+j;
           if j<1 then
            j:=1;
           if k>Size.X then
            k:=Size.X;
           if (k>j) then
            begin
              FrameMask[j-1]:=FrameMask[j-1] or lo(i);
              i:=(lo(i) xor hi(i)) or (i and $ff00);
              FrameMask[k]:=FrameMask[k] or lo(i);
              if hi(i)<>0 then
               begin
                 dec(k,j);
                 repeat
                   FrameMask[j]:=FrameMask[j] or hi(i);
                   inc(j);
                   dec(k);
                 until k=0;
               end;
            end;
         end;
      end;
     CurrView:=CurrView^.Next;
   end;
  ColorMask:=Color shl 8;
  p:=framechars_437;
  {$ifdef unix}
  {Codepage variables are currently Unix only.}
  if internal_codepage<>cp437 then
    p:=framechars_850;
  {$endif}
  for i:=0 to Size.X-1 do
    TVideoBuf(FrameBuf)[i]:=ord(p[FrameMask[i]]) or ColorMask;
end;


procedure TFrame.Draw;
const
  LargeC:array[boolean] of char=('^',#24);
  RestoreC:array[boolean] of char=('|',#18);
  ClickC:array[boolean] of char=('*',#15);
var
  CFrame, CTitle: Word;
  F, I, L, Width: Sw_Integer;
  B: TDrawBuffer;
  Title: TTitleStr;
  Min, Max: TPoint;
begin
  if State and sfDragging <> 0 then
   begin
     CFrame := $0505;
     CTitle := $0005;
     F := 0;
   end
  else if State and sfActive = 0 then
   begin
     CFrame := $0101;
     CTitle := $0002;
     F := 0;
   end
  else
   begin
     CFrame := $0503;
     CTitle := $0004;
     F := 9;
   end;
  CFrame := GetColor(CFrame);
  CTitle := GetColor(CTitle);
  Width := Size.X;
  L := Width - 10;
  if PWindow(Owner)^.Flags and (wfClose+wfZoom) <> 0 then
   Dec(L,6);
  FrameLine(B, 0, F, Byte(CFrame));
  if (PWindow(Owner)^.Number <> wnNoNumber) and
     (PWindow(Owner)^.Number < 10) then
   begin
     Dec(L,4);
     if PWindow(Owner)^.Flags and wfZoom <> 0 then
      I := 7
     else
      I := 3;
     WordRec(B[Width - I]).Lo := PWindow(Owner)^.Number + $30;
   end;
  if Owner <> nil then
   Title := PWindow(Owner)^.GetTitle(L)
  else
   Title := '';
  if Title <> '' then
   begin
     L := Length(Title);
     if L > Width - 10 then
      L := Width - 10;
     if L < 0 then
      L := 0;
     I := (Width - L) shr 1;
     MoveChar(B[I - 1], ' ', CTitle, 1);
     MoveBuf(B[I], Title[1], CTitle, L);
     MoveChar(B[I + L], ' ', CTitle, 1);
   end;
  if State and sfActive <> 0 then
  begin
    if PWindow(Owner)^.Flags and wfClose <> 0 then
      if FrameMode and fmCloseClicked = 0 then
        MoveCStr(B[2], '[~þ~]', CFrame)
      else
        MoveCStr(B[2], '[~'+ClickC[LowAscii]+'~]', CFrame);
    if PWindow(Owner)^.Flags and wfZoom <> 0 then
    begin
      MoveCStr(B[Width - 5], '[~'+LargeC[LowAscii]+'~]', CFrame);
      Owner^.SizeLimits(Min, Max);
      if FrameMode and fmZoomClicked <> 0 then
        WordRec(B[Width - 4]).Lo := ord(ClickC[LowAscii])
      else
        if (Owner^.Size.X=Max.X) and (Owner^.Size.Y=Max.Y) then
          WordRec(B[Width - 4]).Lo := ord(RestoreC[LowAscii]);
    end;
  end;
  WriteLine(0, 0, Size.X, 1, B);
  for I := 1 to Size.Y - 2 do
  begin
    FrameLine(B, I, F + 3, Byte(CFrame));
    WriteLine(0, I, Size.X, 1, B);
  end;
  FrameLine(B, Size.Y - 1, F + 6, Byte(CFrame));
  if State and sfActive <> 0 then
    if PWindow(Owner)^.Flags and wfGrow <> 0 then
      MoveCStr(B[Width - 2], '~ÄÙ~', CFrame);
  WriteLine(0, Size.Y - 1, Size.X, 1, B);
end;

{--TFrame-------------------------------------------------------------------}
{  GetPalette -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 30Jul99 LdB        }
{---------------------------------------------------------------------------}
FUNCTION TFrame.GetPalette: PPalette;
CONST P: String[Length(CFrame)] = CFrame;             { Always normal string }
BEGIN
   GetPalette := @P;                                  { Return palette }
END;

procedure TFrame.HandleEvent(var Event: TEvent);
var
  Mouse: TPoint;

  procedure DragWindow(Mode: Byte);
  var
    Limits: TRect;
    Min, Max: TPoint;
  begin
    Owner^.Owner^.GetExtent(Limits);
    Owner^.SizeLimits(Min, Max);
    Owner^.DragView(Event, Owner^.DragMode or Mode, Limits, Min, Max);
    ClearEvent(Event);
  end;

begin
  TView.HandleEvent(Event);
  if Event.What = evMouseDown then
  begin
    MakeLocal(Event.Where, Mouse);
    if Mouse.Y = 0 then
    begin
      if (PWindow(Owner)^.Flags and wfClose <> 0) and
        (State and sfActive <> 0) and (Mouse.X >= 2) and (Mouse.X <= 4) then
      begin
        repeat
          MakeLocal(Event.Where, Mouse);
          if (Mouse.X >= 2) and (Mouse.X <= 4) and (Mouse.Y = 0) then
            FrameMode := fmCloseClicked
          else FrameMode := 0;
          DrawView;
        until not MouseEvent(Event, evMouseMove + evMouseAuto);
        FrameMode := 0;
        if (Mouse.X >= 2) and (Mouse.X <= 4) and (Mouse.Y = 0) then
        begin
          Event.What := evCommand;
          Event.Command := cmClose;
          Event.InfoPtr := Owner;
          PutEvent(Event);
        end;
        ClearEvent(Event);
        DrawView;
      end else
        if (PWindow(Owner)^.Flags and wfZoom <> 0) and
          (State and sfActive <> 0) and (Event.Double or
          (Mouse.X >= Size.X - 5) and
          (Mouse.X <= Size.X - 3)) then
        begin
          if not Event.Double then
            repeat
              MakeLocal(Event.Where, Mouse);
              if (Mouse.X >= Size.X - 5) and (Mouse.X <= Size.X - 3) and
                (Mouse.Y = 0) then
                FrameMode := fmZoomClicked
              else FrameMode := 0;
              DrawView;
            until not MouseEvent(Event, evMouseMove + evMouseAuto);
          FrameMode := 0;
          if ((Mouse.X >= Size.X - 5) and (Mouse.X <= Size.X - 3) and
              (Mouse.Y = 0)) or Event.Double then
          begin
            Event.What := evCommand;
            Event.Command := cmZoom;
            Event.InfoPtr := Owner;
            PutEvent(Event);
          end;
          ClearEvent(Event);
          DrawView;
        end else
          if PWindow(Owner)^.Flags and wfMove <> 0 then
            DragWindow(dmDragMove);
    end else
      if (State and sfActive <> 0) and (Mouse.X >= Size.X - 2) and
          (Mouse.Y >= Size.Y - 1) then
        if PWindow(Owner)^.Flags and wfGrow <> 0 then
          DragWindow(dmDragGrow);
  end;
end;


procedure TFrame.SetState(AState: Word; Enable: Boolean);
begin
  TView.SetState(AState, Enable);
  if AState and (sfActive + sfDragging) <> 0 then
   DrawView;
end;

{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{                         TScrollBar OBJECT METHODS                         }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}


{--TScrollBar---------------------------------------------------------------}
{  Init -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 22May98 LdB              }
{---------------------------------------------------------------------------}
CONSTRUCTOR TScrollBar.Init (Var Bounds: TRect);
const
  VChars: array[boolean] of TScrollChars =
     (('^','V', #177, #254, #178),(#30, #31, #177, #254, #178));
  HChars: array[boolean] of TScrollChars =
     (('<','>', #177, #254, #178),(#17, #16, #177, #254, #178));
BEGIN
   Inherited Init(Bounds);                            { Call ancestor }
   PgStep := 1;                                       { Page step size = 1 }
   ArStep := 1;                                       { Arrow step sizes = 1 }
   If (Size.X = 1) Then Begin                         { Vertical scrollbar }
     GrowMode := gfGrowLoX + gfGrowHiX + gfGrowHiY;   { Grow vertically }
     Chars := VChars[LowAscii];                       { Vertical chars }
   End Else Begin                                     { Horizontal scrollbar }
     GrowMode := gfGrowLoY + gfGrowHiX + gfGrowHiY;   { Grow horizontal }
     Chars := HChars[LowAscii];                       { Horizontal chars }
   End;
END;

{--TScrollBar---------------------------------------------------------------}
{  Load -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 22May98 LdB              }
{---------------------------------------------------------------------------}
{   This load method will read old original TV data from a stream with the  }
{   scrollbar id set to zero.                                               }
{---------------------------------------------------------------------------}
CONSTRUCTOR TScrollBar.Load (Var S: TStream);
VAR i: Integer;
BEGIN
   Inherited Load(S);                                 { Call ancestor }
   S.Read(i, SizeOf(i)); Value:=i;                    { Read current value }
   S.Read(i, SizeOf(i)); Min:=i;                      { Read min value }
   S.Read(i, SizeOf(i));  Max:=i;                     { Read max value }
   S.Read(i, SizeOf(i)); PgStep:=i;                   { Read page step size }
   S.Read(i, SizeOf(i)); ArStep:=i;                   { Read arrow step size }
   S.Read(Chars, SizeOf(Chars));                      { Read scroll chars }
END;

{--TScrollBar---------------------------------------------------------------}
{  GetPalette -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 22May98 LdB        }
{---------------------------------------------------------------------------}
FUNCTION TScrollBar.GetPalette: PPalette;
CONST P: String[Length(CScrollBar)] = CScrollBar;     { Always normal string }
BEGIN
   GetPalette := @P;                                  { Return palette }
END;

{--TScrollBar---------------------------------------------------------------}
{  ScrollStep -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 22May98 LdB        }
{---------------------------------------------------------------------------}
FUNCTION TScrollBar.ScrollStep (Part: Sw_Integer): Sw_Integer;
VAR Step: Sw_Integer;
BEGIN
   If (Part AND $0002 = 0) Then Step := ArStep        { Range step size }
     Else Step := PgStep;                             { Page step size }
   If (Part AND $0001 = 0) Then ScrollStep := -Step   { Upwards move }
     Else ScrollStep := Step;                         { Downwards move }
END;

{--TScrollBar---------------------------------------------------------------}
{  ScrollDraw -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 22May98 LdB        }
{---------------------------------------------------------------------------}
PROCEDURE TScrollBar.ScrollDraw;
VAR P: PView;
BEGIN
   If (Id <> 0) Then Begin
     P := TopView;                                    { Get topmost view }
     NewMessage(P, evCommand, cmIdCommunicate, Id,
       Value, @Self);                                 { New Id style message }
   End;
   NewMessage(Owner, evBroadcast, cmScrollBarChanged,
     Id, Value, @Self);                               { Old TV style message }
END;


{--TScrollBar---------------------------------------------------------------}
{  SetValue -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 19May98 LdB          }
{---------------------------------------------------------------------------}
PROCEDURE TScrollBar.SetValue (AValue: Sw_Integer);
BEGIN
   SetParams(AValue, Min, Max, PgStep, ArStep);       { Set value }
END;

{--TScrollBar---------------------------------------------------------------}
{  SetRange -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 19May98 LdB          }
{---------------------------------------------------------------------------}
PROCEDURE TScrollBar.SetRange (AMin, AMax: Sw_Integer);
BEGIN
   SetParams(Value, AMin, AMax, PgStep, ArStep);      { Set range }
END;

{--TScrollBar---------------------------------------------------------------}
{  SetStep -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 19May98 LdB           }
{---------------------------------------------------------------------------}
PROCEDURE TScrollBar.SetStep (APgStep, AArStep: Sw_Integer);
BEGIN
   SetParams(Value, Min, Max, APgStep, AArStep);      { Set step sizes }
END;

{--TScrollBar---------------------------------------------------------------}
{  SetParams -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 21Jul99 LdB         }
{---------------------------------------------------------------------------}
PROCEDURE TScrollBar.SetParams (AValue, AMin, AMax, APgStep, AArStep: Sw_Integer);
var
  OldValue : Sw_Integer;
BEGIN
   If (AMax < AMin) Then AMax := AMin;                { Max below min fix up }
   If (AValue < AMin) Then AValue := AMin;            { Value below min fix }
   If (AValue > AMax) Then AValue := AMax;            { Value above max fix }
   OldValue:=Value;
   If (Value <> AValue) OR (Min <> AMin) OR
   (Max <> AMax) Then Begin                           { Something changed }
     Min := AMin;                                   { Set new minimum }
     Max := AMax;                                   { Set new maximum }
     Value := AValue;                               { Set new value }
     DrawView;
     if OldValue <> AValue then
       ScrollDraw;
   End;
   PgStep := APgStep;                                 { Hold page step }
   ArStep := AArStep;                                 { Hold arrow step }
END;

{--TScrollBar---------------------------------------------------------------}
{  Store -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 22May98 LdB             }
{---------------------------------------------------------------------------}
{  You can save data to the stream compatable with the old original TV by   }
{  temporarily turning off the ofGrafVersion making the call to this store  }
{  routine and resetting the ofGrafVersion flag after the call.             }
{---------------------------------------------------------------------------}
PROCEDURE TScrollBar.Store (Var S: TStream);
VAR i: Integer;
BEGIN
   TView.Store(S);                                    { TView.Store called }
   i:=Value;S.Write(i, SizeOf(i));                    { Write current value }
   i:=Min;S.Write(i, SizeOf(i));                      { Write min value }
   i:=Max;S.Write(i, SizeOf(i));                      { Write max value }
   i:=PgStep;S.Write(i, SizeOf(i));                   { Write page step size }
   i:=ArStep;S.Write(i, SizeOf(i));                   { Write arrow step size }
   S.Write(Chars, SizeOf(Chars));                     { Write scroll chars }
END;

{--TScrollBar---------------------------------------------------------------}
{  HandleEvent -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 22May98 LdB       }
{---------------------------------------------------------------------------}
PROCEDURE TScrollBar.HandleEvent (Var Event: TEvent);
VAR Tracking: Boolean; I, P, S, ClickPart, Iv: Sw_Integer;
    Mouse: TPoint; Extent: TRect;

   FUNCTION GetPartCode: Sw_Integer;
   VAR Mark, Part : Sw_Integer;
   BEGIN
     Part := -1;                                      { Preset failure }
     If Extent.Contains(Mouse) Then Begin             { Contains mouse }
       If (Size.X = 1) Then Begin                     { Vertical scrollbar }
         Mark := Mouse.Y - 1;                { Calc position }
       End Else Begin                                 { Horizontal bar }
         Mark := Mouse.X - 1;                 { Calc position }
       End;
       If (Mark >= P) AND (Mark < P+1) Then           { Within thumbnail }
         Part := sbIndicator;                         { Indicator part }
       If (Part <> sbIndicator) Then Begin            { Not indicator part }
         If (Mark < 1) Then Part := sbLeftArrow Else  { Left arrow part }
         If (Mark < P) Then Part := sbPageLeft Else   { Page left part }
         If (Mark < S) Then Part := sbPageRight Else  { Page right part }
           Part := sbRightArrow;                      { Right arrow part }
         If (Size.X = 1) Then Inc(Part, 4);           { Correct for vertical }
       End;
     End;
     GetPartCode := Part;                             { Return part code }
   END;

   PROCEDURE Clicked;
   BEGIN
     NewMessage(Owner, evBroadcast, cmScrollBarClicked,
       Id, Value, @Self);                             { Old TV style message }
   END;

BEGIN
   Inherited HandleEvent(Event);                      { Call ancestor }
   Case Event.What Of
     evNothing: Exit;                                 { Speed up exit }
     evCommand: Begin                                 { Command event }
       If (Event.Command = cmIdCommunicate) AND       { Id communication }
       (Event.Id = Id) AND (Event.InfoPtr <> @Self)   { Targeted to us }
       Then Begin
         SetValue(Round(Event.Data));                 { Set scrollbar value }
         ClearEvent(Event);                           { Event was handled }
       End;
     End;
     evKeyDown:
       If (State AND sfVisible <> 0) Then Begin       { Scrollbar visible }
         ClickPart := sbIndicator;                    { Preset result }
         If (Size.Y = 1) Then                         { Horizontal bar }
           Case CtrlToArrow(Event.KeyCode) Of
             kbLeft: ClickPart := sbLeftArrow;        { Left one item }
             kbRight: ClickPart := sbRightArrow;      { Right one item }
             kbCtrlLeft: ClickPart := sbPageLeft;     { One page left }
             kbCtrlRight: ClickPart := sbPageRight;   { One page right }
             kbHome: I := Min;                        { Move to start }
             kbEnd: I := Max;                         { Move to end }
             Else Exit;                               { Not a valid key }
           End
         Else                                         { Vertical bar }
           Case CtrlToArrow(Event.KeyCode) Of
             kbUp: ClickPart := sbUpArrow;            { One item up }
             kbDown: ClickPart := sbDownArrow;        { On item down }
             kbPgUp: ClickPart := sbPageUp;           { One page up }
             kbPgDn: ClickPart := sbPageDown;         { One page down }
             kbCtrlPgUp: I := Min;                    { Move to top }
             kbCtrlPgDn: I := Max;                    { Move to bottom }
             Else Exit;                               { Not a valid key }
           End;
         Clicked;                                     { Send out message }
         If (ClickPart <> sbIndicator) Then
           I := Value + ScrollStep(ClickPart);        { Calculate position }
         SetValue(I);                                 { Set new item }
         ClearEvent(Event);                           { Event now handled }
     End;
     evMouseDown: Begin                               { Mouse press event }
         Clicked;                                     { Scrollbar clicked }
         MakeLocal(Event.Where, Mouse);                 { Localize mouse }
         Extent.A.X := 0;                             { Zero x extent value }
         Extent.A.Y := 0;                             { Zero y extent value }
         Extent.B.X := Size.X;                     { Set extent x value }
         Extent.B.Y := Size.Y;                     { set extent y value }
         P := GetPos;                                 { Current position }
         S := GetSize;                                { Initial size }
         ClickPart := GetPartCode;                    { Get part code }
         If (ClickPart <> sbIndicator) Then Begin     { Not thumb nail }
           Repeat
             MakeLocal(Event.Where, Mouse);                 { Localize mouse }
             If GetPartCode = ClickPart Then
               SetValue(Value+ScrollStep(ClickPart)); { Same part repeat }
           Until NOT MouseEvent(Event, evMouseAuto);  { Until auto done }
           Clicked;                                   { Scrollbar clicked }
         End Else Begin                               { Thumb nail move }
           Iv := Value;                               { Initial value }
           Repeat
             MakeLocal(Event.Where, Mouse);                 { Localize mouse }
             Tracking := Extent.Contains(Mouse);      { Check contains }
             If Tracking Then Begin                   { Tracking mouse }
               If (Size.X=1) Then
                 I := Mouse.Y-1 Else         { Calc vert position }
                 I := Mouse.X-1;              { Calc horz position }
               If (I < 0) Then I := 0;                { Check underflow }
               If (I > S) Then I := S;                { Check overflow }
             End Else I := GetPos;                    { Get position }
             If (I <> P) Then Begin
               SetValue(LongInt((LongInt(I)*(Max-Min))
                 +(S SHR 1)) DIV S + Min);            { Set new value }
               P := I;                                { Hold new position }
             End;
           Until NOT MouseEvent(Event, evMouseMove);  { Until not moving }
           If Tracking AND (S > 0) Then               { Tracking mouse }
             SetValue(LongInt((LongInt(P)*(Max-Min))+
               (S SHR 1)) DIV S + Min);               { Set new value }
           If (Iv <> Value) Then Clicked;             { Scroll has moved }
         End;
         ClearEvent(Event);                           { Clear the event }
     End;
   End;
END;

{***************************************************************************}
{                 TScrollBar OBJECT PRIVATE METHODS                         }
{***************************************************************************}

{--TScrollBar---------------------------------------------------------------}
{  GetPos -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 23May98 LdB            }
{---------------------------------------------------------------------------}
FUNCTION TScrollBar.GetPos: Sw_Integer;
VAR R: Sw_Integer;
BEGIN
   R := Max - Min;                                    { Get full range }
   If (R = 0) Then GetPos := 1 Else                   { Return zero }
     GetPos := LongInt((LongInt(Value-Min) * (GetSize -3))
       + (R SHR 1)) DIV R + 1;                        { Calc position }
END;

{--TScrollBar---------------------------------------------------------------}
{  GetSize -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 23May98 LdB           }
{---------------------------------------------------------------------------}
FUNCTION TScrollBar.GetSize: Sw_Integer;
VAR S: Sw_Integer;
BEGIN
   If Size.X = 1 Then
     S:= Size.Y
   else
     S:= Size.X;
   If (S < 3) Then S := 3;                            { Fix minimum size }
   GetSize := S;                                      { Return size }
END;


{--TScrollBar---------------------------------------------------------------}
{  Draw -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 27Oct99 LdB              }
{---------------------------------------------------------------------------}
PROCEDURE TScrollBar.Draw;
BEGIN
  DrawPos(GetPos);                                 { Draw position }
END;


procedure TScrollBar.DrawPos(Pos: Sw_Integer);
var
  S: Sw_Integer;
  B: TDrawBuffer;
begin
  S := GetSize - 1;
  MoveChar(B[0], Chars[0], GetColor(2), 1);
  if Max = Min then
    MoveChar(B[1], Chars[4], GetColor(1), S - 1)
  else
   begin
     MoveChar(B[1], Chars[2], GetColor(1), S - 1);
     MoveChar(B[Pos], Chars[3], GetColor(3), 1);
   end;
  MoveChar(B[S], Chars[1], GetColor(2), 1);
  WriteBuf(0, 0, Size.X, Size.Y, B);
end;


{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{                         TScroller OBJECT METHODS                          }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}

{--TScroller----------------------------------------------------------------}
{  Init -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 26Jul99 LdB              }
{---------------------------------------------------------------------------}
CONSTRUCTOR TScroller.Init (Var Bounds: TRect; AHScrollBar, AVScrollBar: PScrollBar);
BEGIN
   Inherited Init(Bounds);                            { Call ancestor }
   Options := Options OR ofSelectable;                { View is selectable }
   EventMask := EventMask OR evBroadcast;             { See broadcasts }
   HScrollBar := AHScrollBar;                         { Hold horz scrollbar }
   VScrollBar := AVScrollBar;                         { Hold vert scrollbar }
END;

{--TScroller----------------------------------------------------------------}
{  Load -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 26Jul99 LdB              }
{---------------------------------------------------------------------------}
{   This load method will read old original TV data from a stream as well   }
{   as the new graphical scroller views.                                    }
{---------------------------------------------------------------------------}
CONSTRUCTOR TScroller.Load (Var S: TStream);
VAR i: Integer;
BEGIN
   Inherited Load(S);                                 { Call ancestor }
   GetPeerViewPtr(S, HScrollBar);                     { Load horz scrollbar }
   GetPeerViewPtr(S, VScrollBar);                     { Load vert scrollbar }
   S.Read(i, SizeOf(i)); Delta.X:=i;                  { Read delta x value }
   S.Read(i, SizeOf(i)); Delta.Y:=i;                  { Read delta y value }
   S.Read(i, SizeOf(i)); Limit.X:=i;                  { Read limit x value }
   S.Read(i, SizeOf(i)); Limit.Y:=i;                  { Read limit y value }
END;

{--TScroller----------------------------------------------------------------}
{  GetPalette -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 26Jul99 LdB        }
{---------------------------------------------------------------------------}
FUNCTION TScroller.GetPalette: PPalette;
CONST P: String[Length(CScroller)] = CScroller;       { Always normal string }
BEGIN
   GetPalette := @P;                                  { Scroller palette }
END;

{--TScroller----------------------------------------------------------------}
{  ScrollTo -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 30Jul99 LdB          }
{---------------------------------------------------------------------------}
PROCEDURE TScroller.ScrollTo (X, Y: Sw_Integer);
BEGIN
   Inc(DrawLock);                                     { Set draw lock }
   If (HScrollBar<>Nil) Then HScrollBar^.SetValue(X); { Set horz scrollbar }
   If (VScrollBar<>Nil) Then VScrollBar^.SetValue(Y); { Set vert scrollbar }
   Dec(DrawLock);                                     { Release draw lock }
   CheckDraw;                                         { Check need to draw }
END;

{--TScroller----------------------------------------------------------------}
{  SetState -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 30Jul99 LdB          }
{---------------------------------------------------------------------------}
PROCEDURE TScroller.SetState (AState: Word; Enable: Boolean);

   PROCEDURE ShowSBar (SBar: PScrollBar);
   BEGIN
     If (SBar <> Nil) Then                            { Scroll bar valid }
       If GetState(sfActive + sfSelected) Then        { Check state masks }
         SBar^.Show Else SBar^.Hide;                  { Draw appropriately }
   END;

BEGIN
   Inherited SetState(AState, Enable);                { Call ancestor }
   If (AState AND (sfActive + sfSelected) <> 0)       { Active/select change }
   Then Begin
     ShowSBar(HScrollBar);                            { Redraw horz scrollbar }
     ShowSBar(VScrollBar);                            { Redraw vert scrollbar }
   End;
END;

{--TScroller----------------------------------------------------------------}
{  Store -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 26Jul99 LdB             }
{---------------------------------------------------------------------------}
{  The scroller is saved to the stream compatable with the old TV object.   }
{---------------------------------------------------------------------------}
PROCEDURE TScroller.Store (Var S: TStream);
VAR i: Integer;
BEGIN
   TView.Store(S);                                    { Call TView explicitly }
   PutPeerViewPtr(S, HScrollBar);                     { Store horz bar }
   PutPeerViewPtr(S, VScrollBar);                     { Store vert bar }
   i:=Delta.X;S.Write(i, SizeOf(i));                  { Write delta x value }
   i:=Delta.Y;S.Write(i, SizeOf(i));                  { Write delta y value }
   i:=Limit.X;S.Write(i, SizeOf(i));                  { Write limit x value }
   i:=Limit.Y;S.Write(i, SizeOf(i));                  { Write limit y value }
END;

{--TScroller----------------------------------------------------------------}
{  HandleEvent -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 30Jul99 LdB       }
{---------------------------------------------------------------------------}
PROCEDURE TScroller.HandleEvent (Var Event: TEvent);
BEGIN
   Inherited HandleEvent(Event);                      { Call ancestor }
   If (Event.What = evBroadcast) AND
     (Event.Command = cmScrollBarChanged) AND         { Scroll bar change }
     ((Event.InfoPtr = HScrollBar) OR                 { Our scrollbar? }
      (Event.InfoPtr = VScrollBar)) Then ScrollDraw;  { Redraw scroller }
END;

{--TScroller----------------------------------------------------------------}
{  ChangeBounds -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 30Jul99 LdB      }
{---------------------------------------------------------------------------}
PROCEDURE TScroller.ChangeBounds (Var Bounds: TRect);
BEGIN
   SetBounds(Bounds);                                 { Set new bounds }
   Inc(DrawLock);                                     { Set draw lock }
   SetLimit(Limit.X, Limit.Y);                        { Adjust limits }
   Dec(DrawLock);                                     { Release draw lock }
   DrawFlag := False;                                 { Clear draw flag }
   DrawView;                                          { Redraw now }
END;

{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{                        TListViewer OBJECT METHODS                         }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}

CONST TvListViewerName = 'LISTBOX';                   { Native name }

{--TListViewer--------------------------------------------------------------}
{  Init -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 28May98 LdB              }
{---------------------------------------------------------------------------}
CONSTRUCTOR TListViewer.Init (Var Bounds: TRect; ANumCols: Sw_Word; AHScrollBar,
  AVScrollBar: PScrollBar);
VAR ArStep, PgStep: Sw_Integer;
BEGIN
   Inherited Init(Bounds);                            { Call ancestor }
   Options := Options OR (ofFirstClick+ofSelectable); { Set options }
   EventMask := EventMask OR evBroadcast;             { Set event mask }
   NumCols := ANumCols;                               { Hold column number }
   If (AVScrollBar <> Nil) Then Begin                 { Chk vert scrollbar }
     If (NumCols = 1) Then Begin                      { Only one column }
       PgStep := Size.Y -1;                           { Set page size }
       ArStep := 1;                                   { Set step size }
     End Else Begin                                   { Multiple columns }
       PgStep := Size.Y * NumCols;                    { Set page size }
       ArStep := Size.Y;                              { Set step size }
     End;
     AVScrollBar^.SetStep(PgStep, ArStep);            { Set scroll values }
   End;
   If (AHScrollBar <> Nil) Then
     AHScrollBar^.SetStep(Size.X DIV NumCols, 1);     { Set step size }
   HScrollBar := AHScrollBar;                         { Horz scrollbar held }
   VScrollBar := AVScrollBar;                         { Vert scrollbar held }
END;

{--TListViewer--------------------------------------------------------------}
{  Load -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 28May98 LdB              }
{---------------------------------------------------------------------------}
CONSTRUCTOR TListViewer.Load (Var S: TStream);
VAR w: Word;
BEGIN
   Inherited Load(S);                                 { Call ancestor }
   GetPeerViewPtr(S, HScrollBar);                     { Get horz scrollbar }
   GetPeerViewPtr(S, VScrollBar);                     { Get vert scrollbar }
   S.Read(w, SizeOf(w)); NumCols:=w;                  { Read column number }
   S.Read(w, SizeOf(w)); TopItem:=w;                  { Read top most item }
   S.Read(w, SizeOf(w)); Focused:=w;                  { Read focused item }
   S.Read(w, SizeOf(w)); Range:=w;                    { Read listview range }
END;

{--TListViewer--------------------------------------------------------------}
{  GetPalette -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 28May98 LdB        }
{---------------------------------------------------------------------------}
FUNCTION TListViewer.GetPalette: PPalette;
CONST P: String[Length(CListViewer)] = CListViewer;   { Always normal string }
BEGIN
   GetPalette := @P;                                  { Return palette }
END;

{--TListViewer--------------------------------------------------------------}
{  IsSelected -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 28May98 LdB        }
{---------------------------------------------------------------------------}
FUNCTION TListViewer.IsSelected (Item: Sw_Integer): Boolean;
BEGIN
   If (Item = Focused) Then IsSelected := True Else
     IsSelected := False;                             { Selected item }
END;

{--TListViewer--------------------------------------------------------------}
{  GetText -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 28May98 LdB           }
{---------------------------------------------------------------------------}
FUNCTION TListViewer.GetText (Item: Sw_Integer; MaxLen: Sw_Integer): String;
BEGIN                                                 { Abstract method }
   GetText := '';                                     { Return empty }
END;

{--TListViewer--------------------------------------------------------------}
{  DrawBackGround -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 27Oct99 LdB    }
{---------------------------------------------------------------------------}
PROCEDURE TListViewer.Draw;
VAR  I, J, ColWidth, Item, Indent, CurCol: Sw_Integer;
     Color: Word; SCOff: Byte;
     Text: String; B: TDrawBuffer;
BEGIN
   ColWidth := Size.X DIV NumCols + 1;                { Calc column width }
   If (HScrollBar = Nil) Then Indent := 0 Else        { Set indent to zero }
     Indent := HScrollBar^.Value;                     { Fetch any indent }
   For I := 0 To Size.Y - 1 Do Begin                  { For each line }
     For J := 0 To NumCols-1 Do Begin                 { For each column }
       Item := J*Size.Y + I + TopItem;                { Process this item }
       CurCol := J*ColWidth;                          { Current column }
       If (State AND (sfSelected + sfActive) =
       (sfSelected + sfActive)) AND (Focused = Item)  { Focused item }
       AND (Range > 0) Then Begin
         Color := GetColor(3);                        { Focused colour }
         SetCursor(CurCol+1,I);                       { Set the cursor }
         SCOff := 0;                                  { Zero colour offset }
       End Else If (Item < Range) AND IsSelected(Item){ Selected item }
       Then Begin
         Color := GetColor(4);                        { Selected color }
         SCOff := 2;                                  { Colour offset=2 }
       End Else Begin
         Color := GetColor(2);                        { Normal Color }
         SCOff := 4;                                  { Colour offset=4 }
       End;
      MoveChar(B[CurCol], ' ', Color, ColWidth);     { Clear buffer }
       If (Item < Range) Then Begin                   { Within text range }
         Text := GetText(Item, ColWidth + Indent);    { Fetch text }
         Text := Copy(Text, Indent, ColWidth);        { Select right bit }
         MoveStr(B[CurCol+1], Text, Color);           { Transfer to buffer }
         If ShowMarkers Then Begin
           WordRec(B[CurCol]).Lo := Byte(
             SpecialChars[SCOff]);                        { Set marker character }
           WordRec(B[CurCol+ColWidth-2]).Lo := Byte(
             SpecialChars[SCOff+1]);                        { Set marker character }
         End;
       End;
       MoveChar(B[CurCol+ColWidth-1], #179,
         GetColor(5), 1);                             { Put centre line marker }
     End;
     WriteLine(0, I, Size.X, 1, B);                 { Write line to screen }
   End;
END;


{--TListViewer--------------------------------------------------------------}
{  FocusItem -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 26Jul99 LdB         }
{---------------------------------------------------------------------------}
PROCEDURE TListViewer.FocusItem (Item: Sw_Integer);
BEGIN
   Focused := Item;                                   { Set focus to item }
   If (VScrollBar <> Nil) Then
     VScrollBar^.SetValue(Item);                      { Scrollbar to value }
   If (Item < TopItem) Then                           { Item above top item }
     If (NumCols = 1) Then TopItem := Item            { Set top item }
       Else TopItem := Item - Item MOD Size.Y         { Set top item }
   Else If (Item >= TopItem + (Size.Y*NumCols)) Then  { Item below bottom }
     If (NumCols = 1) Then TopItem := Item-Size.Y+1   { Set new top item }
     Else TopItem := Item - Item MOD Size.Y -
       (Size.Y*(NumCols-1));                          { Set new top item }
END;

{--TListViewer--------------------------------------------------------------}
{  SetTopItem -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 06Aug99 LdB        }
{---------------------------------------------------------------------------}
PROCEDURE TListViewer.SetTopItem (Item: Sw_Integer);
BEGIN
   TopItem := Item;                                   { Set the top item }
END;

{--TListViewer--------------------------------------------------------------}
{  SetRange -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 26Jul99 LdB          }
{---------------------------------------------------------------------------}
PROCEDURE TListViewer.SetRange (ARange: Sw_Integer);
BEGIN
   Range := ARange;                                   { Set new range }
   If (VScrollBar <> Nil) Then Begin                  { Vertical scrollbar }
     If (Focused > ARange) Then Focused := 0;         { Clear focused }
     VScrollBar^.SetParams(Focused, 0, ARange - 1,
       VScrollBar^.PgStep, VScrollBar^.ArStep);       { Set parameters }
   End;
END;

{--TListViewer--------------------------------------------------------------}
{  SelectItem -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 26Jul99 LdB        }
{---------------------------------------------------------------------------}
PROCEDURE TListViewer.SelectItem (Item: Sw_Integer);
BEGIN
   Message(Owner, evBroadcast, cmListItemSelected,
     @Self);                                          { Send message }
END;

{--TListViewer--------------------------------------------------------------}
{  SetState -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 27Oct99 LdB          }
{---------------------------------------------------------------------------}
PROCEDURE TListViewer.SetState (AState: Word; Enable: Boolean);

   PROCEDURE ShowSBar(SBar: PScrollBar);
   BEGIN
     If (SBar <> Nil) Then                            { Valid scrollbar }
       If GetState(sfActive) AND GetState(sfVisible)  { Check states }
         Then SBar^.Show Else SBar^.Hide;             { Show or hide }
   END;

BEGIN
   Inherited SetState(AState, Enable);                { Call ancestor }
   If (AState AND (sfSelected + sfActive + sfVisible) <> 0)
   Then Begin                                         { Check states }
     DrawView;                                        { Draw the view }
     ShowSBar(HScrollBar);                            { Show horz scrollbar }
     ShowSBar(VScrollBar);                            { Show vert scrollbar }
   End;
END;

{--TListViewer--------------------------------------------------------------}
{  Store -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 26Jul99 LdB             }
{---------------------------------------------------------------------------}
PROCEDURE TListViewer.Store (Var S: TStream);
VAR w: Word;
BEGIN
   TView.Store(S);                                    { Call TView explicitly }
   PutPeerViewPtr(S, HScrollBar);                     { Put horz scrollbar }
   PutPeerViewPtr(S, VScrollBar);                     { Put vert scrollbar }
   w:=NumCols;S.Write(w, SizeOf(w));                  { Write column number }
   w:=TopItem;S.Write(w, SizeOf(w));                  { Write top most item }
   w:=Focused;S.Write(w, SizeOf(w));                  { Write focused item }
   w:=Range;S.Write(w, SizeOf(w));                    { Write listview range }
END;

{--TListViewer--------------------------------------------------------------}
{  HandleEvent -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 27Oct99 LdB       }
{---------------------------------------------------------------------------}
PROCEDURE TListViewer.HandleEvent (Var Event: TEvent);
CONST MouseAutosToSkip = 4;
VAR Oi, Ni: Sw_Integer; Ct, Cw: Word; Mouse: TPoint;

   PROCEDURE MoveFocus (Req: Sw_Integer);
   BEGIN
     FocusItemNum(Req);                               { Focus req item }
     DrawView;                                      { Redraw focus box }
   END;

BEGIN
   Inherited HandleEvent(Event);                      { Call ancestor }
   Case Event.What Of
     evNothing: Exit;                                 { Speed up exit }
     evKeyDown: Begin                                 { Key down event }
       If (Event.CharCode = ' ') AND (Focused < Range){ Spacebar select }
       Then Begin
         SelectItem(Focused);                         { Select focused item }
         Ni := Focused;                               { Hold new item }
       End Else Case CtrlToArrow(Event.KeyCode) Of
         kbUp: Ni := Focused - 1;                     { One item up }
         kbDown: Ni := Focused + 1;                   { One item down }
         kbRight: If (NumCols > 1) Then
           Ni := Focused + Size.Y Else Exit;          { One column right }
         kbLeft: If (NumCols > 1) Then
           Ni := Focused - Size.Y Else Exit;          { One column left }
         kbPgDn: Ni := Focused + Size.Y * NumCols;    { One page down }
         kbPgUp: Ni := Focused - Size.Y * NumCols;    { One page up }
         kbHome: Ni := TopItem;                       { Move to top }
         kbEnd: Ni := TopItem + (Size.Y*NumCols)-1;   { Move to bottom }
         kbCtrlPgDn: Ni := Range - 1;                 { Move to last item }
         kbCtrlPgUp: Ni := 0;                         { Move to first item }
         Else Exit;
       End;
       MoveFocus(Ni);                                 { Move the focus }
       ClearEvent(Event);                             { Event was handled }
     End;
     evBroadcast: Begin                               { Broadcast event }
       If (Options AND ofSelectable <> 0) Then        { View is selectable }
         If (Event.Command = cmScrollBarClicked) AND  { Scrollbar click }
         ((Event.InfoPtr = HScrollBar) OR
         (Event.InfoPtr = VScrollBar)) Then Select    { Scrollbar selects us }
         Else If (Event.Command = cmScrollBarChanged) { Scrollbar changed }
         Then Begin
           If (VScrollBar = Event.InfoPtr) Then Begin
             MoveFocus(VScrollBar^.Value);            { Focus us to item }
           End Else If (HScrollBar = Event.InfoPtr)
             Then DrawView;                           { Redraw the view }
         End;
     End;
     evMouseDown: Begin                               { Mouse down event }
       Cw := Size.X DIV NumCols + 1;                  { Column width }
       Oi := Focused;                                 { Hold focused item }
       MakeLocal(Event.Where, Mouse);                 { Localize mouse }
       If MouseInView(Event.Where) Then Ni := Mouse.Y
         + (Size.Y*(Mouse.X DIV Cw))+TopItem          { Calc item to focus }
         Else Ni := Oi;                               { Focus old item }
       Ct := 0;                                       { Clear count value }
       Repeat
         If (Ni <> Oi) Then Begin                     { Item is different }
           MoveFocus(Ni);                             { Move the focus }
           Oi := Focused;                             { Hold as focused item }
         End;
         MakeLocal(Event.Where, Mouse);               { Localize mouse }
         If NOT MouseInView(Event.Where) Then Begin
           If (Event.What = evMouseAuto) Then Inc(Ct);{ Inc auto count }
           If (Ct = MouseAutosToSkip) Then Begin
             Ct := 0;                                 { Reset count }
             If (NumCols = 1) Then Begin              { Only one column }
               If (Mouse.Y < 0) Then Ni := Focused-1; { Move up one item  }
               If (Mouse.Y >= Size.Y) Then
                 Ni := Focused+1;                     { Move down one item }
             End Else Begin                           { Multiple columns }
               If (Mouse.X < 0) Then                  { Mouse x below zero }
                 Ni := Focused-Size.Y;                { Move down 1 column }
               If (Mouse.X >= Size.X) Then            { Mouse x above width }
                 Ni := Focused+Size.Y;                { Move up 1 column }
               If (Mouse.Y < 0) Then                  { Mouse y below zero }
                 Ni := Focused-Focused MOD Size.Y;    { Move up one item }
               If (Mouse.Y > Size.Y) Then             { Mouse y above height }
                 Ni := Focused-Focused MOD
                   Size.Y+Size.Y-1;                   { Move down one item }
             End;
           End;
         End Else Ni := Mouse.Y + (Size.Y*(Mouse.X
           DIV Cw))+TopItem;                          { New item to focus }
       Until NOT MouseEvent(Event, evMouseMove +
         evMouseAuto);                                { Mouse stopped }
       If (Oi <> Ni) Then MoveFocus(Ni);              { Focus moved again }
       If (Event.Double AND (Range > Focused)) Then
         SelectItem(Focused);                         { Select the item }
       ClearEvent(Event);                             { Event was handled }
     End;
   End;
END;

{--TListViewer--------------------------------------------------------------}
{  ChangeBounds -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 30Jul99 LdB      }
{---------------------------------------------------------------------------}
PROCEDURE TListViewer.ChangeBounds (Var Bounds: TRect);
BEGIN
   Inherited ChangeBounds(Bounds);                    { Call ancestor }
   If (HScrollBar <> Nil) Then                        { Valid horz scrollbar }
     HScrollBar^.SetStep(Size.X DIV NumCols,
       HScrollBar^.ArStep);                           { Update horz bar }
   If (VScrollBar <> Nil) Then                        { Valid vert scrollbar }
     VScrollBar^.SetStep(Size.Y * NumCols,
       VScrollBar^.ArStep);                           { Update vert bar }
END;

{***************************************************************************}
{                     TListViewer OBJECT PRIVATE METHODS                    }
{***************************************************************************}

{--TListViewer--------------------------------------------------------------}
{  FocusItemNum -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 26Jul99 LdB      }
{---------------------------------------------------------------------------}
PROCEDURE TListViewer.FocusItemNum (Item: Sw_Integer);
BEGIN
   If (Item < 0) Then Item := 0 Else                  { Restrain underflow }
     If (Item >= Range) AND (Range > 0) Then
       Item := Range-1;                               { Restrain overflow }
   If (Range <> 0) Then FocusItem(Item);              { Set focus value }
END;

{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{                          TWindow OBJECT METHODS                           }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}

{--TWindow------------------------------------------------------------------}
{  Init -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 30Jul99 LdB              }
{---------------------------------------------------------------------------}
CONSTRUCTOR TWindow.Init (Var Bounds: TRect; ATitle: TTitleStr; ANumber: Sw_Integer);
BEGIN
   Inherited Init(Bounds);                            { Call ancestor }
   State := State OR sfShadow;                        { View is shadowed }
   Options := Options OR (ofSelectable+ofTopSelect);  { Select options set }
   GrowMode := gfGrowAll + gfGrowRel;                 { Set growmodes }
   Flags := wfMove + wfGrow + wfClose + wfZoom;       { Set flags }
   Title := NewStr(ATitle);                           { Hold title }
   Number := ANumber;                                 { Hold number }
   Palette := wpBlueWindow;                           { Default palette }
   InitFrame;                                         { Initialize frame }
   If (Frame <> Nil) Then Insert(Frame);              { Insert any frame }
   GetBounds(ZoomRect);                               { Default zoom rect }
END;

{--TWindow------------------------------------------------------------------}
{  Load -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 15Sep97 LdB              }
{---------------------------------------------------------------------------}
{   This load method will read old original TV data from a stream however   }
{   although a frame view is read for compatability it is disposed of.      }
{---------------------------------------------------------------------------}
CONSTRUCTOR TWindow.Load (Var S: TStream);
VAR I: Integer;
BEGIN
   Inherited Load(S);                                 { Call ancestor }
   S.Read(Flags, SizeOf(Flags));                      { Read window flags }
   S.Read(i, SizeOf(i)); Number:=i;                                { Read window number }
   S.Read(i, SizeOf(i)); Palette:=i;                               { Read window palette }
   S.Read(i, SizeOf(i)); ZoomRect.A.X:=i;                          { Read zoom area x1 }
   S.Read(i, SizeOf(i)); ZoomRect.A.Y:=i;                          { Read zoom area y1 }
   S.Read(i, SizeOf(i)); ZoomRect.B.X:=i;                          { Read zoom area x2 }
   S.Read(i, SizeOf(i)); ZoomRect.B.Y:=i;                          { Read zoom area y2 }
   GetSubViewPtr(S, Frame);                           { Now read frame object }
   Title := S.ReadStr;                                { Read title }
END;

{--TWindow------------------------------------------------------------------}
{  Done -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB              }
{---------------------------------------------------------------------------}
DESTRUCTOR TWindow.Done;
BEGIN
   Inherited Done;                                    { Call ancestor }
   If (Title <> Nil) Then DisposeStr(Title);          { Dispose title }
END;

{--TWindow------------------------------------------------------------------}
{  GetPalette -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB        }
{---------------------------------------------------------------------------}
FUNCTION TWindow.GetPalette: PPalette;
CONST  P: ARRAY [wpBlueWindow..wpGrayWindow] Of String[Length(CBlueWindow)] =
  (CBlueWindow, CCyanWindow, CGrayWindow);            { Always normal string }
BEGIN
   GetPalette := @P[Palette];                         { Return palette }
END;

{--TWindow------------------------------------------------------------------}
{  GetTitle -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB          }
{  Modified 31may2002 PM  (No number included anymore)                      }
{---------------------------------------------------------------------------}
FUNCTION TWindow.GetTitle (MaxSize: Sw_Integer): TTitleStr;
VAR S: String;
BEGIN
   If (Title <> Nil) Then S:=Title^
   Else S := '';
   if Length(S)>MaxSize then
     GetTitle:=Copy(S,1,MaxSize)
   else
     GetTitle:=S;
END;

{--TWindow------------------------------------------------------------------}
{  StandardScrollBar -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB }
{---------------------------------------------------------------------------}
FUNCTION TWindow.StandardScrollBar (AOptions: Word): PScrollBar;
VAR R: TRect; S: PScrollBar;
BEGIN
   GetExtent(R);                                      { View extents }
   If (AOptions AND sbVertical = 0) Then
     R.Assign(R.A.X+2, R.B.Y-1, R.B.X-2, R.B.Y)       { Horizontal scrollbar }
     Else R.Assign(R.B.X-1, R.A.Y+1, R.B.X, R.B.Y-1); { Vertical scrollbar }
   S := New(PScrollBar, Init(R));                     { Create scrollbar }
   Insert(S);                                         { Insert scrollbar }
   If (AOptions AND sbHandleKeyboard <> 0) Then
     S^.Options := S^.Options or ofPostProcess;       { Post process }
   StandardScrollBar := S;                            { Return scrollbar }
END;

{--TWindow------------------------------------------------------------------}
{  Zoom -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 23Sep97 LdB              }
{---------------------------------------------------------------------------}
PROCEDURE TWindow.Zoom;
VAR R: TRect; Max, Min: TPoint;
BEGIN
   SizeLimits(Min, Max);                              { Return size limits }
   If ((Size.X <> Max.X) OR (Size.Y <> Max.Y))        { Larger size possible }
   Then Begin
     GetBounds(ZoomRect);                             { Get zoom bounds }
     R.A.X := 0;                                      { Zero x origin }
     R.A.Y := 0;                                      { Zero y origin }
     R.B := Max;                                      { Bounds to max size }
     Locate(R);                                       { Locate the view }
   End Else Locate(ZoomRect);                         { Move to zoom rect }
END;

{--TWindow------------------------------------------------------------------}
{  Close -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 23Sep97 LdB             }
{---------------------------------------------------------------------------}
PROCEDURE TWindow.Close;
BEGIN
   If Valid(cmClose) Then Free;                       { Dispose of self }
END;

{--TWindow------------------------------------------------------------------}
{  InitFrame -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 30Jul99 LdB         }
{---------------------------------------------------------------------------}
PROCEDURE TWindow.InitFrame;
VAR
  R: TRect;
BEGIN
  GetExtent(R);
  Frame := New(PFrame, Init(R));
END;

{--TWindow------------------------------------------------------------------}
{  SetState -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 30Mar98 LdB          }
{---------------------------------------------------------------------------}
PROCEDURE TWindow.SetState (AState: Word; Enable: Boolean);
VAR WindowCommands: TCommandSet;
BEGIN
   Inherited SetState(AState, Enable);                { Call ancestor }
   If (AState = sfSelected) Then
     SetState(sfActive, Enable);                      { Set active state }
   If (AState = sfSelected) OR ((AState = sfExposed)
   AND (State AND sfSelected <> 0)) Then Begin        { View is selected }
     WindowCommands := [cmNext, cmPrev];              { Set window commands }
     If (Flags AND (wfGrow + wfMove) <> 0) Then
       WindowCommands := WindowCommands + [cmResize]; { Add resize command }
     If (Flags AND wfClose <> 0) Then
       WindowCommands := WindowCommands + [cmClose];  { Add close command }
     If (Flags AND wfZoom <> 0) Then
       WindowCommands := WindowCommands + [cmZoom];   { Add zoom command }
     If Enable Then EnableCommands(WindowCommands)    { Enable commands }
       Else DisableCommands(WindowCommands);          { Disable commands }
   End;
END;

{--TWindow------------------------------------------------------------------}
{  Store -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 30Mar98 LdB             }
{---------------------------------------------------------------------------}
{  You can save data to the stream compatable with the old original TV by   }
{  temporarily turning off the ofGrafVersion making the call to this store  }
{  routine and resetting the ofGrafVersion flag after the call.             }
{---------------------------------------------------------------------------}
PROCEDURE TWindow.Store (Var S: TStream);
VAR i: Integer;
BEGIN
   TGroup.Store(S);                                   { Call group store }
   S.Write(Flags, SizeOf(Flags));                     { Write window flags }
   i:=Number;S.Write(i, SizeOf(i));                   { Write window number }
   i:=Palette;S.Write(i, SizeOf(i));                  { Write window palette }
   i:=ZoomRect.A.X;S.Write(i, SizeOf(i));             { Write zoom area x1 }
   i:=ZoomRect.A.Y;S.Write(i, SizeOf(i));             { Write zoom area y1 }
   i:=ZoomRect.B.X;S.Write(i, SizeOf(i));             { Write zoom area x2 }
   i:=ZoomRect.B.Y;S.Write(i, SizeOf(i));             { Write zoom area y2 }
   PutSubViewPtr(S, Frame);                           { Write any frame }
   S.WriteStr(Title);                                 { Write title string }
END;

{--TWindow------------------------------------------------------------------}
{  HandleEvent -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 11Aug99 LdB       }
{---------------------------------------------------------------------------}
PROCEDURE TWindow.HandleEvent (Var Event: TEvent);
VAR
  Min, Max: TPoint; Limits: TRect;

   PROCEDURE DragWindow (Mode: Byte);
   VAR Limits: TRect; Min, Max: TPoint;
   BEGIN
     Owner^.GetExtent(Limits);                        { Get owner extents }
     SizeLimits(Min, Max);                            { Restrict size }
     DragView(Event, DragMode OR Mode, Limits, Min,
       Max);                                          { Drag the view }
     ClearEvent(Event);                               { Clear the event }
   END;

BEGIN
   Inherited HandleEvent(Event);                      { Call ancestor }
   Case Event.What Of
     evNothing: Exit;                                 { Speeds up exit }
     evCommand:                                       { COMMAND EVENT }
       Case Event.Command Of                          { Command type case }
         cmResize:                                    { RESIZE COMMAND }
           If (Flags AND (wfMove + wfGrow) <> 0)      { Window can resize }
           AND (Owner <> Nil) Then Begin              { Valid owner }
             Owner^.GetExtent(Limits);                { Owners extents }
             SizeLimits(Min, Max);                    { Check size limits }
             DragView(Event, DragMode OR (Flags AND
               (wfMove + wfGrow)), Limits, Min, Max); { Drag the view }
             ClearEvent(Event);                       { Clear the event }
           End;
         cmClose:                                     { CLOSE COMMAND }
           If (Flags AND wfClose <> 0) AND            { Close flag set }
           ((Event.InfoPtr = Nil) OR                  { None specific close }
           (Event.InfoPtr = @Self)) Then Begin        { Close to us }
             ClearEvent(Event);                       { Clear the event }
             If (State AND sfModal = 0) Then Close    { Non modal so close }
             Else Begin                               { Modal window }
               Event.What := evCommand;               { Command event }
               Event.Command := cmCancel;             { Cancel command }
               PutEvent(Event);                       { Place on queue }
               ClearEvent(Event);                     { Clear the event }
             End;
           End;
         cmZoom:                                      { ZOOM COMMAND }
           If (Flags AND wfZoom <> 0) AND             { Zoom flag set }
           ((Event.InfoPtr = Nil) OR                  { No specific zoom }
           (Event.InfoPtr = @Self)) Then Begin
             Zoom;                                    { Zoom our window }
             ClearEvent(Event);                       { Clear the event }
           End;
       End;
     evBroadcast:                                     { BROADCAST EVENT }
       If (Event.Command = cmSelectWindowNum) AND
       (Event.InfoInt = Number) AND                   { Select our number }
       (Options AND ofSelectable <> 0) Then Begin     { Is view selectable }
         Select;                                      { Select our view }
         ClearEvent(Event);                           { Clear the event }
       End;
     evKeyDown: Begin                                 { KEYDOWN EVENT }
       Case Event.KeyCode Of
         kbTab: Begin                                 { TAB KEY }
           FocusNext(False);                          { Select next view }
           ClearEvent(Event);                         { Clear the event }
         End;
         kbShiftTab: Begin                            { SHIFT TAB KEY }
           FocusNext(True);                           { Select prior view }
           ClearEvent(Event);                         { Clear the event }
         End;
       End;
     End;
   End;                                               { Event.What case end }
END;

{--TWindow------------------------------------------------------------------}
{  SizeLimits -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 15Sep97 LdB        }
{---------------------------------------------------------------------------}
PROCEDURE TWindow.SizeLimits (Var Min, Max: TPoint);
BEGIN
   Inherited SizeLimits(Min, Max);                    { View size limits }
   Min.X := MinWinSize.X;                             { Set min x size }
   Min.Y := MinWinSize.Y;                             { Set min y size }
END;



{--TView--------------------------------------------------------------------}
{  Exposed -> Platforms DOS/DPMI/WIN/OS2 - Checked 17Sep97 LdB              }
{---------------------------------------------------------------------------}
function TView.do_ExposedRec1(x1,x2:sw_integer; p:PView):boolean;
var
  G : PGroup;
  dy,dx : sw_integer;
begin
  while true do
   begin
     p:=p^.Next;
     G:=p^.Owner;
     if p=staticVar2.target then
      begin
        do_exposedRec1:=do_exposedRec2(x1,x2,G);
        Exit;
      end;
     dy:=p^.origin.y;
     dx:=p^.origin.x;
     if ((p^.state and sfVisible)<>0) and (staticVar2.y>=dy) then
      begin
        if staticVar2.y<dy+p^.size.y then
         begin
           if x1<dx then
            begin
              if x2<=dx then
               continue;
              if x2>dx+p^.size.x then
               begin
                 if do_exposedRec1(x1,dx,p) then
                  begin
                    do_exposedRec1:=True;
                    Exit;
                  end;
                 x1:=dx+p^.size.x;
               end
              else
               x2:=dx;
           end
          else
           begin
             if x1<dx+p^.size.x then
              x1:=dx+p^.size.x;
             if x1>=x2 then
              begin
                do_exposedRec1:=False;
                Exit;
              end;
           end;
        end;
      end;
   end;
end;


function TView.do_ExposedRec2(x1,x2:Sw_integer; p:PView):boolean;
var
  G : PGroup;
  savedStat : TStatVar2;
begin
  if (p^.state and sfVisible)=0 then
   do_ExposedRec2:=false
  else
   begin
     G:=p^.Owner;
     if (G=Nil) or (G^.Buffer<>Nil) then
      do_ExposedRec2:=true
     else
      begin
        savedStat:=staticVar2;
        inc(staticVar2.y,p^.origin.y);
        inc(x1,p^.origin.x);
        inc(x2,p^.origin.x);
        staticVar2.target:=p;
        if (staticVar2.y<G^.clip.a.y) or (staticVar2.y>=G^.clip.b.y) then
         do_ExposedRec2:=false
        else
         begin
           if (x1<G^.clip.a.x) then
            x1:=G^.clip.a.x;
           if (x2>G^.clip.b.x) then
            x2:=G^.clip.b.x;
           if (x1>=x2) then
            do_ExposedRec2:=false
           else
            do_ExposedRec2:=do_exposedRec1(x1,x2,G^.Last);
         end;
        staticVar2 := savedStat;
      end;
   end;
end;


function TView.Exposed: Boolean;
var
  OK : boolean;
  y  : sw_integer;
begin
  if ((State and sfExposed)<>0) and (Size.X>0) and (Size.Y>0) then
   begin
     OK:=false;
     y:=0;
     while (y<Size.Y) and (not OK) do
      begin
        staticVar2.y:=y;
        OK:=do_ExposedRec2(0,Size.X,@Self);
        inc(y);
      end;
     Exposed:=OK;
   end
  else
   Exposed:=False
end;


{--TView--------------------------------------------------------------------}
{  MakeLocal -> Platforms DOS/DPMI/WIN/OS2 - Checked 12Sep97 LdB            }
{---------------------------------------------------------------------------}
PROCEDURE TView.MakeLocal (Source: TPoint; Var Dest: TPoint);
var
  cur : PView;
begin
  cur:=@Self;
  Dest:=Source;
  repeat
    dec(Dest.X,cur^.Origin.X);
    if dest.x<0 then
     break;
    dec(Dest.Y,cur^.Origin.Y);
    if dest.y<0 then
     break;
    cur:=cur^.Owner;
  until cur=nil;
end;


{--TView--------------------------------------------------------------------}
{  MakeGlobal -> Platforms DOS/DPMI/WIN/OS2 - Checked 12Sep97 LdB           }
{---------------------------------------------------------------------------}
PROCEDURE TView.MakeGlobal (Source: TPoint; Var Dest: TPoint);
var
  cur : PView;
begin
  cur:=@Self;
  Dest:=Source;
  repeat
    inc(Dest.X,cur^.Origin.X);
    inc(Dest.Y,cur^.Origin.Y);
    cur:=cur^.Owner;
  until cur=nil;
end;


procedure TView.do_writeViewRec1(x1,x2:Sw_integer; p:PView; shadowCounter:Sw_integer);
var
  G      : PGroup;
  c      : Word;
  BufPos,
  SrcPos,
  l,dx : Sw_integer;
begin
  repeat
    p:=p^.Next;
    if (p=staticVar2.target) then
     begin
       G:=p^.Owner;
       if (G^.buffer<>Nil) then
        begin
          BufPos:=G^.size.x * staticVar2.y + x1;
          SrcPos:=x1 - staticVar2.offset;
          l:=x2-x1;
          if (shadowCounter=0) then
           move(staticVar1^[SrcPos],PVideoBuf(G^.buffer)^[BufPos],l shl 1)
          else
           begin { paint with shadowAttr }
             while (l>0) do
              begin
                c:=staticVar1^[SrcPos];
                WordRec(c).hi:=shadowAttr;
                PVideoBuf(G^.buffer)^[BufPos]:=c;
                inc(BufPos);
                inc(SrcPos);
                dec(l);
              end;
           end;
        end;
       if G^.lockFlag=0 then
         do_writeViewRec2(x1,x2,G,shadowCounter);
       exit;
     end; { p=staticVar2.target }

    if ((p^.state and sfVisible)<>0) and (staticVar2.y>=p^.Origin.Y) then
     begin
       if staticVar2.y<p^.Origin.Y+p^.size.Y then
        begin
          if x1<p^.origin.x then
           begin
             if x2<=p^.origin.x then
              continue;
             do_writeViewRec1(x1,p^.origin.x,p,shadowCounter);
             x1:=p^.origin.x;
           end;
          dx:=p^.origin.x+p^.size.x;
          if (x2<=dx) then
           exit;
          if (x1<dx) then
           x1:=dx;
          inc(dx,shadowSize.x);
          if ((p^.state and sfShadow)<>0) and (staticVar2.y>=p^.origin.y+shadowSize.y) then
           if (x1>dx) then
            continue
           else
            begin
              inc(shadowCounter);
              if (x2<=dx) then
               continue
              else
               begin
                 do_writeViewRec1(x1,dx,p,shadowCounter);
                 x1:=dx;
                 dec(shadowCounter);
                 continue;
               end;
            end
           else
            continue;
        end;

       if ((p^.state and sfShadow)<>0) and (staticVar2.y<p^.origin.y+p^.size.y+shadowSize.y) then
        begin
          dx:=p^.origin.x+shadowSize.x;
          if x1<dx then
           begin
             if x2<=dx then
              continue;
             do_writeViewRec1(x1,dx,p,shadowCounter);
             x1:=dx;
           end;
          inc(dx,p^.size.x);
          if x1>=dx then
           continue;
          inc(shadowCounter);
          if x2<=dx then
           continue
          else
           begin
             do_writeViewRec1(x1,dx,p,shadowCounter);
             x1:=dx;
             dec(shadowCounter);
           end;
        end;
     end;
  until false;
end;


procedure TView.do_writeViewRec2(x1,x2:Sw_integer; p:PView; shadowCounter:Sw_integer);
var
  savedStatics : TstatVar2;
  dx : Sw_integer;
  G  : PGroup;
begin
  G:=P^.Owner;
  if ((p^.State and sfVisible) <> 0) and (G<>Nil) then
   begin
     savedStatics:=staticVar2;
     inc(staticVar2.y,p^.Origin.Y);
     dx:=p^.Origin.X;
     inc(x1,dx);
     inc(x2,dx);
     inc(staticVar2.offset,dx);
     staticVar2.target:=p;
     if (staticVar2.y >= G^.clip.a.y) and (staticVar2.y < G^.clip.b.y) then
      begin
        if (x1<g^.clip.a.x) then
         x1 := g^.clip.a.x;
        if (x2>g^.clip.b.x) then
         x2 := g^.clip.b.x;
        if x1<x2 then
         do_writeViewRec1(x1,x2,G^.Last,shadowCounter);
      end;
     staticVar2 := savedStatics;
   end;
end;


procedure TView.do_WriteView(x1,x2,y:Sw_integer; var Buf);
begin
  if (y>=0) and (y<Size.Y) then
   begin
     if x1<0 then
      x1:=0;
     if x2>Size.X then
      x2:=Size.X;
     if x1<x2 then
      begin
        staticVar2.offset:=x1;
        staticVar2.y:=y;
        staticVar1:=@Buf;
        do_writeViewRec2( x1, x2, @Self, 0 );
      end;
   end;
end;


procedure TView.WriteBuf(X, Y, W, H: Sw_Integer; var Buf);
var
  i : Sw_integer;
begin
  if h>0 then
   for i:= 0 to h-1 do
    do_writeView(X,X+W,Y+i,TVideoBuf(Buf)[W*i]);
end;


procedure TView.WriteChar(X,Y:Sw_Integer; C:Char; Color:Byte; Count:Sw_Integer);
var
  B : TDrawBuffer;
  myChar : word;
  i : Sw_integer;
begin
  myChar:=MapColor(Color);
  myChar:=(myChar shl 8) + ord(C);
  if Count>0 then
   begin
     if Count>maxViewWidth then
      Count:=maxViewWidth;
     for i:=0 to Count-1 do
      B[i]:=myChar;
     do_writeView(X,X+Count,Y,B);
   end;
  DrawScreenBuf;
end;


procedure TView.WriteLine(X, Y, W, H: Sw_Integer; var Buf);
var
  i:Sw_integer;
begin
  if h>0 then
   for i:=0 to h-1 do
    do_writeView(x,x+w,y+i,buf);
  DrawScreenBuf;
end;


procedure TView.WriteStr(X, Y: Sw_Integer; Str: String; Color: Byte);
var
  l,i : Sw_word;
  B : TDrawBuffer;
  myColor : word;
begin
  l:=length(Str);
  if l>0 then
   begin
     if l>maxViewWidth then
      l:=maxViewWidth;
     MyColor:=MapColor(Color);
     MyColor:=MyColor shl 8;
     for i:=0 to l-1 do
      B[i]:=MyColor+ord(Str[i+1]);
     do_writeView(x,x+l,y,b);
   end;
  DrawScreenBuf;
end;


procedure TView.DragView(Event: TEvent; Mode: Byte;
  var Limits: TRect; MinSize, MaxSize: TPoint);
var
  P, S: TPoint;
  SaveBounds: TRect;

  procedure MoveGrow(P, S: TPoint);
  var
    R: TRect;
  begin
    S.X := Min(Max(S.X, MinSize.X), MaxSize.X);
    S.Y := Min(Max(S.Y, MinSize.Y), MaxSize.Y);
    P.X := Min(Max(P.X, Limits.A.X - S.X + 1), Limits.B.X - 1);
    P.Y := Min(Max(P.Y, Limits.A.Y - S.Y + 1), Limits.B.Y - 1);
    if Mode and dmLimitLoX <> 0 then P.X := Max(P.X, Limits.A.X);
    if Mode and dmLimitLoY <> 0 then P.Y := Max(P.Y, Limits.A.Y);
    if Mode and dmLimitHiX <> 0 then P.X := Min(P.X, Limits.B.X - S.X);
    if Mode and dmLimitHiY <> 0 then P.Y := Min(P.Y, Limits.B.Y - S.Y);
    R.Assign(P.X, P.Y, P.X + S.X, P.Y + S.Y);
    Locate(R);
  end;

  procedure Change(DX, DY: Sw_Integer);
  begin
    if (Mode and dmDragMove <> 0) and (Event.KeyShift{GetShiftState} and $03 = 0) then
    begin
      Inc(P.X, DX);
      Inc(P.Y, DY);
    end else
    if (Mode and dmDragGrow <> 0) and (Event.KeyShift{GetShiftState} and $03 <> 0) then
    begin
      Inc(S.X, DX);
      Inc(S.Y, DY);
    end;
  end;

  procedure Update(X, Y: Sw_Integer);
  begin
    if Mode and dmDragMove <> 0 then
    begin
      P.X := X;
      P.Y := Y;
    end;
  end;

begin
  SetState(sfDragging, True);
  if Event.What = evMouseDown then
  begin
    if Mode and dmDragMove <> 0 then
    begin
      P.X := Origin.X - Event.Where.X;
      P.Y := Origin.Y - Event.Where.Y;
      repeat
        Inc(Event.Where.X, P.X);
        Inc(Event.Where.Y, P.Y);
        MoveGrow(Event.Where, Size);
      until not MouseEvent(Event, evMouseMove);
    end else
    begin
      P.X := Size.X - Event.Where.X;
      P.Y := Size.Y - Event.Where.Y;
      repeat
        Inc(Event.Where.X, P.X);
        Inc(Event.Where.Y, P.Y);
        MoveGrow(Origin, Event.Where);
      until not MouseEvent(Event, evMouseMove);
    end;
  end else
  begin
    GetBounds(SaveBounds);
    repeat
      P := Origin;
      S := Size;
      KeyEvent(Event);
      case Event.KeyCode and $FF00 of
        kbLeft: Change(-1, 0);
        kbRight: Change(1, 0);
        kbUp: Change(0, -1);
        kbDown: Change(0, 1);
        kbCtrlLeft: Change(-8, 0);
        kbCtrlRight: Change(8, 0);
        kbHome: Update(Limits.A.X, P.Y);
        kbEnd: Update(Limits.B.X - S.X, P.Y);
        kbPgUp: Update(P.X, Limits.A.Y);
        kbPgDn: Update(P.X, Limits.B.Y - S.Y);
      end;
      MoveGrow(P, S);
    until (Event.KeyCode = kbEnter) or (Event.KeyCode = kbEsc);
    if Event.KeyCode = kbEsc then
      Locate(SaveBounds);
  end;
  SetState(sfDragging, False);
end;


{***************************************************************************}
{                         TScroller OBJECT METHODS                          }
{***************************************************************************}

PROCEDURE TScroller.ScrollDraw;
VAR D: TPoint;
BEGIN
   If (HScrollBar<>Nil) Then D.X := HScrollBar^.Value
     Else D.X := 0;                                   { Horz scroll value }
   If (VScrollBar<>Nil) Then D.Y := VScrollBar^.Value
     Else D.Y := 0;                                   { Vert scroll value }
   If (D.X<>Delta.X) OR (D.Y<>Delta.Y) Then Begin     { View has moved }
     SetCursor(Cursor.X+Delta.X-D.X,
       Cursor.Y+Delta.Y-D.Y);                         { Move the cursor }
     Delta := D;                                      { Set new delta }
     If (DrawLock<>0) Then DrawFlag := True           { Draw will need draw }
       Else DrawView;                                 { Redraw the view }
   End;
END;

PROCEDURE TScroller.SetLimit (X, Y: Sw_Integer);
VAR PState: Word;
BEGIN
   Limit.X := X;                                      { Hold x limit }
   Limit.Y := Y;                                      { Hold y limit }
   Inc(DrawLock);                                     { Set draw lock }
   If (HScrollBar<>Nil) Then Begin
     PState := HScrollBar^.State;                     { Hold bar state }
     HScrollBar^.State := PState AND NOT sfVisible;   { Temp not visible }
     HScrollBar^.SetParams(HScrollBar^.Value, 0,
       X-Size.X, Size.X-1, HScrollBar^.ArStep);       { Set horz scrollbar }
     HScrollBar^.State := PState;                     { Restore bar state }
   End;
   If (VScrollBar<>Nil) Then Begin
     PState := VScrollBar^.State;                     { Hold bar state }
     VScrollBar^.State := PState AND NOT sfVisible;   { Temp not visible }
     VScrollBar^.SetParams(VScrollBar^.Value, 0,
       Y-Size.Y, Size.Y-1, VScrollBar^.ArStep);       { Set vert scrollbar }
     VScrollBar^.State := PState;                     { Restore bar state }
   End;
   Dec(DrawLock);                                     { Release draw lock }
   CheckDraw;                                         { Check need to draw }
END;

{***************************************************************************}
{                      TScroller OBJECT PRIVATE METHODS                     }
{***************************************************************************}
PROCEDURE TScroller.CheckDraw;
BEGIN
   If (DrawLock = 0) AND DrawFlag Then Begin          { Clear & draw needed }
     DrawFlag := False;                               { Clear draw flag }
     DrawView;                                        { Draw now }
   End;
END;



{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{                          TGroup OBJECT METHODS                            }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}




{--TGroup-------------------------------------------------------------------}
{  Lock -> Platforms DOS/DPMI/WIN/OS2 - Checked 23Sep97 LdB                 }
{---------------------------------------------------------------------------}
{$ifndef  NoLock}
{$define UseLock}
{$endif ndef  NoLock}
PROCEDURE TGroup.Lock;
BEGIN
{$ifdef UseLock}
   {If (Buffer <> Nil) OR (LockFlag <> 0)
     Then} Inc(LockFlag);                              { Increment count }
{$endif UseLock}
END;

{--TGroup-------------------------------------------------------------------}
{  UnLock -> Platforms DOS/DPMI/WIN/OS2 - Checked 23Sep97 LdB               }
{---------------------------------------------------------------------------}
PROCEDURE TGroup.Unlock;
BEGIN
{$ifdef UseLock}
   If (LockFlag <> 0) Then Begin
     Dec(LockFlag);                                   { Decrement count }
     If (LockFlag = 0) Then DrawView;                 { Lock release draw }
   End;
{$endif UseLock}
END;


{***************************************************************************}
{                            INTERFACE ROUTINES                             }
{***************************************************************************}

{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{                         WINDOW MESSAGE ROUTINES                           }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}

{---------------------------------------------------------------------------}
{  Message -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB           }
{---------------------------------------------------------------------------}
FUNCTION Message (Receiver: PView; What, Command: Word;
  InfoPtr: Pointer): Pointer;
VAR Event: TEvent;
BEGIN
   Message := Nil;                                    { Preset nil }
   If (Receiver <> Nil) Then Begin                    { Valid receiver }
     Event.What := What;                              { Set what }
     Event.Command := Command;                        { Set command }
     Event.Id := 0;                                   { Zero id field }
     Event.Data := 0;                                 { Zero data field }
     Event.InfoPtr := InfoPtr;                        { Set info ptr }
     Receiver^.HandleEvent(Event);                    { Pass to handler }
     If (Event.What = evNothing) Then
       Message := Event.InfoPtr;                      { Return handler }
   End;
END;

{---------------------------------------------------------------------------}
{  NewMessage -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 19Sep97 LdB        }
{---------------------------------------------------------------------------}
FUNCTION NewMessage (P: PView; What, Command: Word; Id: Sw_Integer;
  Data: Real; InfoPtr: Pointer): Pointer;
VAR Event: TEvent;
BEGIN
   NewMessage := Nil;                                 { Preset failure }
   If (P <> Nil) Then Begin
     Event.What := What;                              { Set what }
     Event.Command := Command;                        { Set event command }
     Event.Id := Id;                                  { Set up Id }
     Event.Data := Data;                              { Set up data }
     Event.InfoPtr := InfoPtr;                        { Set up event ptr }
     P^.HandleEvent(Event);                           { Send to view }
     If (Event.What = evNothing) Then
       NewMessage := Event.InfoPtr;                   { Return handler }
   End;
END;

{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{                            NEW VIEW ROUTINES                              }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}

{---------------------------------------------------------------------------}
{  CreateIdScrollBar -> Platforms DOS/DPMI/WIN/NT/OS2 - Checked 22May97 LdB }
{---------------------------------------------------------------------------}
FUNCTION CreateIdScrollBar (X, Y, Size, Id: Sw_Integer; Horz: Boolean): PScrollBar;
VAR R: TRect; P: PScrollBar;
BEGIN
   If Horz Then R.Assign(X, Y, X+Size, Y+1) Else      { Horizontal bar }
     R.Assign(X, Y, X+1, Y+Size);                     { Vertical bar }
   P := New(PScrollBar, Init(R));                     { Create scrollbar }
   If (P <> Nil) Then Begin
     P^.Id := Id;                                     { Set scrollbar id }
     P^.Options := P^.Options OR ofPostProcess;       { Set post processing }
   End;
   CreateIdScrollBar := P;                            { Return scrollbar }
END;

{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{                      OBJECT REGISTRATION PROCEDURES                       }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}

{---------------------------------------------------------------------------}
{  RegisterViews -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 28May97 LdB     }
{---------------------------------------------------------------------------}
PROCEDURE RegisterViews;
BEGIN
   RegisterType(RView);                               { Register views }
   RegisterType(RFrame);                              { Register frame }
   RegisterType(RScrollBar);                          { Register scrollbar }
   RegisterType(RScroller);                           { Register scroller }
   RegisterType(RListViewer);                         { Register listview }
   RegisterType(RGroup);                              { Register group }
   RegisterType(RWindow);                             { Register window }
END;

END.