126 lines
2.9 KiB
ObjectPascal
126 lines
2.9 KiB
ObjectPascal
// SPDX-License-Identifier: LGPL-3.0-linking-exception
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{ This component partialy solve problem with no alpha in lazarus GTK.
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It is using BGRABitmap library for drawing icons.
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originally written in 2011 by Krzysztof Dibowski dibowski at interia.pl
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}
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{******************************* CONTRIBUTOR(S) ******************************
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- Edivando S. Santos Brasil | mailedivando@gmail.com
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(Compatibility with delphi VCL 11/2018)
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***************************** END CONTRIBUTOR(S) *****************************}
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unit BGRAImageList;
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{$I bgracontrols.inc}
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interface
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uses
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Classes, SysUtils, {$IFDEF FPC}LResources,{$ENDIF} Forms, Controls, Graphics, Dialogs,
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GraphType, BGRABitmap, BGRABitmapTypes, {%H-}ImgList;
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{$IFDEF LCLgtk}
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{ $DEFINE BGRA_DRAW}
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{$ELSE}
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{$IFDEF LCLgtk2}
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{ $DEFINE BGRA_DRAW}
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{$ENDIF}
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{$ENDIF}
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type
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{ TBGRAImageList }
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TBGRAImageList = class(TImageList)
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private
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{ Private declarations }
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{$IFDEF BGRA_DRAW}
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FBGRA: TBGRABitmap;
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FBmp: TBitmap;
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{$ENDIF}
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protected
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{ Protected declarations }
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public
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{ Public declarations }
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{$IFDEF BGRA_DRAW}
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constructor Create(AOwner: TComponent); override;
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destructor Destroy; override;
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procedure Draw(ACanvas: TCanvas; AX, AY, AIndex: integer;
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ADrawingStyle: TDrawingStyle; AImageType: TImageType;
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ADrawEffect: TGraphicsDrawEffect); override;
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{$ENDIF}
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published
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{ Published declarations }
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end;
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{$IFDEF FPC}procedure Register;{$ENDIF}
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implementation
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{$IFDEF FPC}
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procedure Register;
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begin
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RegisterComponents('BGRA Controls', [TBGRAImageList]);
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end;
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{$ENDIF}
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{$IFDEF BGRA_DRAW}
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{ TBGRAImageList }
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constructor TBGRAImageList.Create(AOwner: TComponent);
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begin
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inherited Create(AOwner);
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FBGRA := TBGRABitmap.Create;
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FBmp := TBitmap.Create;
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end;
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destructor TBGRAImageList.Destroy;
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begin
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FBGRA.Free;
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FBmp.Free;
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inherited Destroy;
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end;
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{ Problem with no alpha is only on GTK so on Windows we use default drawing }
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procedure TBGRAImageList.Draw(ACanvas: TCanvas; AX, AY, AIndex: integer;
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ADrawingStyle: TDrawingStyle; AImageType: TImageType;
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ADrawEffect: TGraphicsDrawEffect);
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begin
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//inherited; - We use TBGRABitmap drawing only
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// This is required part from TImageList.Draw
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if (AIndex < 0) or (AIndex >= Count) then
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Exit;
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ReferenceNeeded;
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{*** BGRA Drawing *** }
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case ADrawEffect of
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gdeDisabled:
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begin
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{$IFDEF FPC}
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GetBitmap(AIndex, FBmp, gdeNormal);
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{$ELSE}
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GetBitmapRaw(AIndex, FBmp, gdeNormal);
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{$ENDIF}
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FBGRA.Assign(FBmp);
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BGRAReplace(FBGRA, FBGRA.FilterGrayscale);
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end;
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else
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begin
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{$IFDEF FPC}
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GetBitmap(AIndex, FBmp, ADrawEffect);
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{$ELSE}
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GetBitmapRaw(AIndex, FBmp, ADrawEffect);
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{$ENDIF}
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FBGRA.Assign(FBmp);
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end;
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end;
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if ADrawingStyle in [dsFocus, dsSelected] then
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FBGRA.ApplyGlobalOpacity(128);
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FBGRA.Draw(ACanvas, AX, AY, False);
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end;
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{$ENDIF}
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end.
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