lazarus.fresnel/demo/ScrollBox/MainUnit.pas

unit MainUnit;

{$mode ObjFPC}{$H+}

interface

uses
  Classes, SysUtils, Fresnel.Forms, Fresnel.Controls, Fresnel.Events,
  FCL.Events, Fresnel.DemoRadioButton, Fresnel.DemoCheckbox;

type

  { TMainForm }

  TMainForm = class(TFresnelForm)
    Body1: TBody;
    ScrollDiv1: TDiv;
    Div2: TDiv;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    OptionsDiv: TDiv;
    OverflowXDiv: TDiv;
    OverflowXLabel: TLabel;
    OverflowXVisible: TDemoRadioButton;
    OverflowXHidden: TDemoRadioButton;
    OverflowXClip: TDemoRadioButton;
    OverflowXScroll: TDemoRadioButton;
    OverflowXAuto: TDemoRadioButton;
    OverflowYDiv: TDiv;
    OverflowYLabel: TLabel;
    OverflowYVisible: TDemoRadioButton;
    OverflowYHidden: TDemoRadioButton;
    OverflowYClip: TDemoRadioButton;
    OverflowYScroll: TDemoRadioButton;
    OverflowYAuto: TDemoRadioButton;
    AutoHideCheckBox: TDemoCheckBox;
    OverlayCheckBox: TDemoCheckBox;
    ThinCheckBox: TDemoCheckBox;
    RTLCheckBox: TDemoCheckBox;
    BothEdgesCheckBox: TDemoCheckBox;
    procedure MainFormCreate(Sender: TObject);
    procedure OnAutoHideClicked(Event : TAbstractEvent);
    procedure OnOverflowXClicked(Event : TAbstractEvent);
    procedure OnOverflowYClicked(Event : TAbstractEvent);
    procedure OnOverlayClicked(Event : TAbstractEvent);
    procedure OnThinClicked(Event : TAbstractEvent);
    procedure OnRTLClicked(Event : TAbstractEvent);
    procedure OnBothEdgesClicked(Event : TAbstractEvent);
  private
  public
    procedure ApplyScrollbarGutter;
  end;

var
  MainForm: TMainForm;

implementation

{$R *.lfm}

{ TMainForm }

procedure TMainForm.MainFormCreate(Sender: TObject);
begin
  Label1.Caption:='Fresnel is a visual component library based on CSS and custom drawn components.';

  ScrollDiv1.Style:='overflow: auto; width: 200px; height: 50px;';
  OverflowXAuto.Checked:=true;
  OverflowYAuto.Checked:=true;

  OverlayCheckBox.Checked:=ScrollbarsOverlay;
  AutoHideCheckBox.Checked:=ScrollbarsAutoHide;

  // todo: step buttons
  // todo: stable
  // todo: scrollbar-color: red #f004
end;

procedure TMainForm.OnAutoHideClicked(Event: TAbstractEvent);
begin
  ScrollbarsAutoHide:=AutoHideCheckBox.Checked;
end;

procedure TMainForm.OnOverflowXClicked(Event: TAbstractEvent);
var
  El: TDemoRadioButton;
begin
  El:=Event.Sender as TDemoRadioButton;
  //writeln('TMainForm.OnOverflowXClicked ',El.Caption);
  ScrollDiv1.SetStyleAttr('overflow-x',El.Caption);
end;

procedure TMainForm.OnOverflowYClicked(Event: TAbstractEvent);
var
  El: TDemoRadioButton;
begin
  El:=Event.Sender as TDemoRadioButton;
  //writeln('TMainForm.OnOverflowYClicked ',El.Caption);
  ScrollDiv1.SetStyleAttr('overflow-y',El.Caption);
end;

procedure TMainForm.OnOverlayClicked(Event: TAbstractEvent);
begin
  ScrollbarsOverlay:=OverlayCheckBox.Checked;
end;

procedure TMainForm.OnThinClicked(Event: TAbstractEvent);
begin
  if ThinCheckBox.Checked then
    ScrollDiv1.SetStyleAttr('scrollbar-width','thin')
  else
    ScrollDiv1.SetStyleAttr('scrollbar-width','');
end;

procedure TMainForm.OnRTLClicked(Event: TAbstractEvent);
begin
  if RTLCheckBox.Checked then
    ScrollDiv1.SetStyleAttr('direction','rtl')
  else
    ScrollDiv1.SetStyleAttr('direction','');
end;

procedure TMainForm.OnBothEdgesClicked(Event: TAbstractEvent);
begin
  ApplyScrollbarGutter;
end;

procedure TMainForm.ApplyScrollbarGutter;
var
  s: String;
begin
  s:='';
  if BothEdgesCheckBox.Checked then
    s:=s+' both-edges';
  ScrollDiv1.SetStyleAttr('scrollbar-gutter',s);
end;

end.