Added: initial implementation for disabled drawing
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@ -108,29 +108,45 @@ type
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private
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FBackground: TColor;
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FContainer: TX2GraphicContainer;
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FEnabled: Boolean;
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FStretchMode: TX2GLStretchMode;
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FUpdateCount: Integer;
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procedure SetBackground(const Value: TColor);
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procedure SetContainer(const Value: TX2GraphicContainer);
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procedure SetStretchMode(const Value: TX2GLStretchMode);
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procedure SetEnabled(const Value: Boolean);
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protected
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procedure DefineProperties(Filer: TFiler); override;
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procedure Notification(AComponent: TComponent; Operation: TOperation); override;
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function DrawGraphic(const AIndex: Integer;
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const ACanvas: TCanvas;
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const AX, AY: Integer;
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const AEnabled: Boolean = True): Boolean;
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procedure DoDraw(Index: Integer; Canvas: TCanvas; X, Y: Integer;
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Style: Cardinal; Enabled: Boolean = True); override;
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procedure CreateImage(const AIndex: Integer; var AImage, AMask: TBitmap); virtual;
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procedure AddImage(const AIndex: Integer); virtual;
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procedure UpdateImage(const AIndex: Integer); virtual;
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procedure DeleteImage(const AIndex: Integer); virtual;
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procedure RebuildImages(); virtual;
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procedure BeginUpdate();
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procedure EndUpdate();
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public
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constructor Create(AOwner: TComponent); override;
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destructor Destroy(); override;
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procedure Loaded(); override;
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procedure Change(); override;
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published
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property Background: TColor read FBackground write SetBackground default clBtnFace;
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property Container: TX2GraphicContainer read FContainer write SetContainer;
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property Enabled: Boolean read FEnabled write SetEnabled;
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property StretchMode: TX2GLStretchMode read FStretchMode write SetStretchMode default smCrop;
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end;
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@ -345,6 +361,14 @@ begin
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RebuildImages();
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end;
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procedure TX2GraphicList.Change;
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begin
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inherited;
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if FUpdateCount = 0 then
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RebuildImages();
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end;
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destructor TX2GraphicList.Destroy;
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begin
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@ -358,21 +382,16 @@ end;
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{========================= TX2GraphicList
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Graphics
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========================================}
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procedure TX2GraphicList.CreateImage;
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function DrawGraphic(const ADest: TCanvas; const AIndex: Integer): Boolean;
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function TX2GraphicList.DrawGraphic;
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procedure InternalDrawGraphic(const ADest: TCanvas);
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var
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rDest: TRect;
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begin
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Result := False;
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if not Assigned(FContainer.Graphics[AIndex].Picture) then
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exit;
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with FContainer.Graphics[AIndex].Picture do
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begin
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if (FStretchMode = smCrop) or
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((Width <= Self.Width) and (Height <= Self.Height)) then
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ADest.Draw(0, 0, Graphic)
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ADest.Draw(AX, AY, Graphic)
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else
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begin
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rDest := Rect(0, 0, Width, Height);
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@ -384,11 +403,65 @@ procedure TX2GraphicList.CreateImage;
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ADest.StretchDraw(rDest, Graphic);
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end;
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end;
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Result := True;
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end;
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var
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bmpBackground: TBitmap;
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bmpBlend: TBitmap;
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begin
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Result := False;
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if not Assigned(FContainer) then
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exit;
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if FContainer.Graphics[AIndex].Picture.Graphic.Empty then
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exit;
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if AEnabled then
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// Enabled, simply draw the graphic
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InternalDrawGraphic(ACanvas)
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else
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begin
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// Disabled, need to draw the image using 50% transparency. There's only
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// one problem; not all TGraphic's support that, and neither is there a
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// generic way of determining a pixel's transparency. So instead, we
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// blend the background with a copy of the background with the graphic
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// painted on it...
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bmpBackground := TBitmap.Create();
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bmpBlend := TBitmap.Create();
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try
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// Get background from canvas
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with bmpBackground do
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begin
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Width := Self.Width;
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Height := Self.Height;
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PixelFormat := pf24bit;
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Canvas.CopyRect(Rect(0, 0, Width, Height), ACanvas,
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Rect(AX, AY, AX + Width, AY + Height));
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end;
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bmpBlend.Assign(bmpBackground);
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InternalDrawGraphic(bmpBlend.Canvas);
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// TODO Blend graphic with background
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// TODO Copy blended graphic back
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finally
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FreeAndNil(bmpBlend);
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FreeAndNil(bmpBackground);
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end;
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end;
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Result := True;
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end;
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procedure TX2GraphicList.DoDraw;
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begin
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DrawGraphic(Index, Canvas, X, Y, Enabled);
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end;
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procedure TX2GraphicList.CreateImage;
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function RGBTriple(const AColor: TColor): TRGBTriple;
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var
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cColor: Cardinal;
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@ -442,7 +515,7 @@ begin
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begin
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Brush.Color := FBackground;
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FillRect(Rect(0, 0, Width, Height));
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bOk := DrawGraphic(Canvas, AIndex);
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bOk := DrawGraphic(AIndex, Canvas, 0, 0, FEnabled);
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end;
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end;
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@ -476,7 +549,7 @@ begin
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begin
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Brush.Color := clBlack;
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FillRect(Rect(0, 0, Width, Height));
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DrawGraphic(Canvas, AIndex);
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DrawGraphic(AIndex, Canvas, 0, 0, FEnabled);
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end;
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end;
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@ -526,19 +599,24 @@ begin
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if csLoading in ComponentState then
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exit;
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bmpImage := TBitmap.Create();
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bmpMask := TBitmap.Create();
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BeginUpdate();
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try
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CreateImage(AIndex, bmpImage, bmpMask);
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Assert(AIndex <= Self.Count, 'AAAH! Images out of sync! *panics*');
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bmpImage := TBitmap.Create();
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bmpMask := TBitmap.Create();
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try
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CreateImage(AIndex, bmpImage, bmpMask);
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Assert(AIndex <= Self.Count, 'AAAH! Images out of sync! *panics*');
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if AIndex = Self.Count then
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Add(bmpImage, bmpMask)
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else
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Insert(AIndex, bmpImage, bmpMask);
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if AIndex = Self.Count then
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Add(bmpImage, bmpMask)
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else
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Insert(AIndex, bmpImage, bmpMask);
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finally
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FreeAndNil(bmpMask);
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FreeAndNil(bmpImage);
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end;
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finally
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FreeAndNil(bmpMask);
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FreeAndNil(bmpImage);
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EndUpdate();
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end;
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end;
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@ -551,20 +629,30 @@ begin
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if csLoading in ComponentState then
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exit;
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bmpImage := TBitmap.Create();
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bmpMask := TBitmap.Create();
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BeginUpdate();
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try
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CreateImage(AIndex, bmpImage, bmpMask);
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Replace(AIndex, bmpImage, bmpMask);
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bmpImage := TBitmap.Create();
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bmpMask := TBitmap.Create();
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try
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CreateImage(AIndex, bmpImage, bmpMask);
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Replace(AIndex, bmpImage, bmpMask);
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finally
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FreeAndNil(bmpMask);
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FreeAndNil(bmpImage);
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end;
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finally
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FreeAndNil(bmpMask);
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FreeAndNil(bmpImage);
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EndUpdate();
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end;
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end;
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procedure TX2GraphicList.DeleteImage;
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begin
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Delete(AIndex);
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BeginUpdate();
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try
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Delete(AIndex);
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finally
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EndUpdate();
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end;
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end;
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@ -577,13 +665,18 @@ begin
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(Width = 0) or (Height = 0) then
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exit;
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Clear();
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BeginUpdate();
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try
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Clear();
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if not Assigned(FContainer) then
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exit;
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if not Assigned(FContainer) then
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exit;
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for iIndex := 0 to FContainer.Graphics.Count - 1 do
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AddImage(iIndex);
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for iIndex := 0 to FContainer.Graphics.Count - 1 do
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AddImage(iIndex);
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finally
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EndUpdate();
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end;
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end;
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@ -640,10 +733,28 @@ begin
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RebuildImages();
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end;
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procedure TX2GraphicList.SetEnabled;
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begin
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FEnabled := Value;
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RebuildImages();
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end;
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procedure TX2GraphicList.SetStretchMode;
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begin
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FStretchMode := Value;
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RebuildImages();
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end;
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procedure TX2GraphicList.BeginUpdate;
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begin
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Inc(FUpdateCount);
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end;
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procedure TX2GraphicList.EndUpdate;
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begin
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Assert(FUpdateCount > 0, 'EndUpdate without matching BeginUpdate!');
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Dec(FUpdateCount);
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end;
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end.
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