//
// The graphics engine GXScene https://github.com/glscene
//
unit FMxSkinEditor;

(* Editor for skins *)

interface

uses
  System.Messaging,
  System.SysUtils,
  System.Types,
  System.UITypes,
  System.Classes,
  System.Variants,
  System.Math.Vectors,
  FMX.Types,
  FMX.Controls,
  FMX.Forms,
  FMX.Graphics,
  FMX.Dialogs,
  FMX.StdCtrls,
  FMX.Layouts,
  FMX.ListBox,
  FMX.Objects,
  FMX.Controls.Presentation,
  FMX.Edit,
  FMX.Controls3D,

  GXS.BaseClasses,
  GXS.Gui,
  GXS.Texture,
  GXS.Material;

type
  TSkinEditorForm = class(TForm)
    PanElements: TPanel;
    StatusBar: TStatusBar;
    PanBottom: TPanel;
    Label1: TLabel;
    btnAdd: TButton;
    btnDelete: TButton;
    LBElements: TListBox;
    Label2: TLabel;
    ComboBox1: TComboBox;
    PanImageProperties: TPanel;
    PanZoomImage: TPanel;
    SBarHorizontal: TScrollBar;
    SBarVertical: TScrollBar;
    ImgFull: TImage;
    ButtonOK: TButton;
    ImageOK: TImage;
    ButtonCancel: TButton;
    ImageCancel: TImage;
    Panel1: TPanel;
    ImgPreview: TImage;
    Panel2: TPanel;
    Label3: TLabel;
    CheckBox1: TCheckBox;
    Label4: TLabel;
    Label5: TLabel;
    EditWidth: TEdit;
    EditHeight: TEdit;
    GLCamera1: TCamera;
    GLPanel1: TPanel;
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
  private
    FOriginalWndProc: TWndMethod;
    FFocusRect: TRect;
    VisibleRect: TRect;
    PreviewMousePoint: TPoint;
    PreviewWidth,
      PreviewHeight: Integer;
    FullMousePoint: TPoint;
    MouseDown: Boolean;
    procedure ImageWndProc(var Message: TMessage);
    procedure DrawImageFocusRect(ARect: TRect);
    procedure AlignZoomPanel;
    procedure UpdateRegionEdits;
    procedure SetEditState(Parent: TControl; Enabled: Boolean);
    procedure AddElement(Index: Integer);
    procedure DrawCrossair(Point: TPoint);
  public
    TheGuiComponent: TgxGuiElementList;
    SelectedElement: TgxGUIElement;
    Tex: TgxTexture;
    Zoom: Single;
    Width: Integer;
    Height: Integer;
    function Edit(GuiComponent: TgxGuiElementList): Boolean;
    procedure Render;
    procedure SetMax(Scrollbar: TScrollbar; Val: Integer);
  end;

var
  SkinEditorForm: TSkinEditorForm;

function GUIComponentDialog(GuiComponent: TgxGuiElementList): Boolean;

//--------------------------------------------------------------------
implementation
//--------------------------------------------------------------------

{$R *.fmx}

function GUIComponentDialog(GuiComponent: TgxGuiElementList): Boolean;
var
  Editor: TSkinEditorForm;
begin
  Editor := TSkinEditorForm.Create(nil);
  Result := Editor.Edit(GuiComponent);
  Editor.Free;
end;

procedure TSkinEditorForm.FormCreate(Sender: TObject);
begin
  //override original WndProc to capture image mouse leave message
  //with FMX tools
  (*
  FOriginalWndProc := ImgFull.WindowProc;
  imgFull.WindowProc := ImageWndProc;

  Tex := TgxTexture.Create(Self);
  Tex.SetImageClassName('TgxPersistentImage');
  GLPanel1.RedrawAtOnce := True;

  StatusBar.Panels[0].Text := 'X : 0';
  StatusBar.Panels[1].Text := 'Y : 0';
  AlignZoomPanel;
  UpdateRegionEdits;
  DoubleBuffered := True;
  FullMousePoint := Point(-1, -1);

  //this Delphi bug shows all panels transparent
  //the code below is to avoid this bug in XP
  panElements.ParentBackground := False;
  panElements.ParentBackground := True;
  panElements.ParentBackground := False;

  panImageProperties.ParentBackground := False;
  panImageProperties.ParentBackground := True;
  panImageProperties.ParentBackground := False;

  panBottom.ParentBackground := False;
  panBottom.ParentBackground := True;
  panBottom.ParentBackground := False;

  panZoomImage.ParentBackground := False;
  panZoomImage.ParentBackground := True;
  panZoomImage.ParentBackground := False;
 *)
end;

procedure TSkinEditorForm.FormDestroy(Sender: TObject);
begin
  Tex.Free;
end;

function TSkinEditorForm.Edit(GuiComponent: TgxGuiElementList): Boolean;
var
  Mat: TgxMaterial;
  GuiLayout: TgxGuiLayout;
  XC: Integer;

begin
  TheGuiComponent := GuiComponent;
  GuiLayout := (GuiComponent.GetOwner as TgxGuiComponent).Owner.GetOwner as
    TgxGuiLayout;
  Mat := GuiLayout.Material;
  GLPanel1.Visible := True;
   { TODO : E2003 Undeclared identifier: 'GuiLayout' }
   (*
  GLPanel1.GuiLayout := GuiLayout;
  GLPanel1.GuiLayoutName := (GuiComponent.GetOwner as TGuiComponent).Name;
  *)
  Zoom := 1.0;

  if (Assigned(mat.MaterialLibrary)
    and (mat.MaterialLibrary is TgxMaterialLibrary)
    and (Mat.LibMaterialName <> '')) then
  begin
    mat :=
      TgxMaterialLibrary(mat.MaterialLibrary).Materials.GetLibMaterialByName(Mat.LibMaterialName).Material;
  end;
  Width := Mat.Texture.Image.Width;
  Height := Mat.Texture.Image.Height;
   { TODO : E2003 Undeclared identifier }
   (*
  WidthEdit.Text := IntToStr(Mat.Texture.Image.Width);
  HeightEdit.Text := IntToStr(Mat.Texture.Image.Height);
  GLPanel1.GuiLayout.Material.Assign(Mat);
  *)
  Tex.Assign(mat.Texture);
   { TODO : E2003 Undeclared identifier }
   (*
  imgPreview.Bitmap.Canvas.StretchDraw(imgPreview.ClientRect, (Tex.Image
    as TgxPersistentImage).Picture.Bitmap);
  PreviewWidth := (Tex.Image as TgxPersistentImage).Picture.Width;
  Previewheight := (Tex.Image as TgxPersistentImage).Picture.Height;
  *)
  lbElements.Clear;
  for XC := 0 to TheGuiComponent.Count - 1 do
  begin
    lbElements.Items.Add(TheGuiComponent.Items[XC].Name);
  end;

  if TheGuiComponent.Count > 0 then
  begin
    SelectedElement := TheGuiComponent.Items[0];
    lbElements.ItemIndex := 0;
  end
  else
    SelectedElement := nil;
  Render;
  Result := ShowModal = mrOk;
end;

procedure TSkinEditorForm.AddElement(Index: Integer);
begin

end;

procedure TSkinEditorForm.AlignZoomPanel;
begin

end;

procedure TSkinEditorForm.DrawCrossair(Point: TPoint);
begin

end;

procedure TSkinEditorForm.DrawImageFocusRect(ARect: TRect);
begin

end;


procedure TSkinEditorForm.ImageWndProc(var Message: TMessage);
begin

end;

procedure TSkinEditorForm.Render;
begin

end;

procedure TSkinEditorForm.SetEditState(Parent: TControl; Enabled: Boolean);
begin

end;

procedure TSkinEditorForm.SetMax(Scrollbar: TScrollbar; Val: Integer);
begin

end;

procedure TSkinEditorForm.UpdateRegionEdits;
begin

end;

end.