112 lines
2.7 KiB
ObjectPascal
112 lines
2.7 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 BGRASpeedButton;
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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,{$ENDIF} Forms, Controls, Graphics, Dialogs, Buttons, BGRABitmap,
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{$IFNDEF FPC}Types, BGRAGraphics, GraphType, FPImage, {$ENDIF}
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BGRABitmapTypes;
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{$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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{ TBGRASpeedButton }
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TBGRASpeedButton = class(TSpeedButton)
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private
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{ Private declarations }
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{$IFDEF BGRA_DRAW}
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FBGRA: TBGRABitmap;
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{$ENDIF}
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protected
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{ Protected declarations }
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{$IFDEF BGRA_DRAW}
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function DrawGlyph(ACanvas: TCanvas; const AClient: TRect;
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const AOffset: TPoint; AState: TButtonState; {%H-}ATransparent: boolean;
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{%H-}BiDiFlags: longint): TRect; override;
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{$ENDIF}
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public
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{ Public declarations }
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{$IFDEF BGRA_DRAW}
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constructor Create(AOwner: TComponent); override;
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destructor Destroy; override;
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{$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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{$IFDEF FPC}
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procedure Register;
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begin
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RegisterComponents('BGRA Button Controls', [TBGRASpeedButton]);
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end;
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{$ENDIF}
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{$IFDEF BGRA_DRAW}
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{ TBGRASpeedButton }
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function TBGRASpeedButton.DrawGlyph(ACanvas: TCanvas; const AClient: TRect;
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const AOffset: TPoint; AState: TButtonState; ATransparent: boolean;
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BiDiFlags: longint): TRect;
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begin
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{*** We are using BGRABitmap drawing only ***}
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{Result := inherited DrawGlyph(ACanvas, AClient, AOffset, AState,
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ATransparent, BiDiFlags); }
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if not Assigned(Glyph) then
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begin
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Result := Rect(0,0,0,0);
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Exit;
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end;
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{ It's not good solution assigning glyph on each draw call but FGlyph and SetGlyph is
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in private section }
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FBGRA.Assign(Glyph);
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if (AState = bsDown) or (Down = True) then
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FBGRA.Draw(ACanvas, AOffset.x + 1, AOffset.y + 1, False)
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else
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FBGRA.Draw(ACanvas, AOffset.x, AOffset.y, False);
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Result := AClient;
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end;
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constructor TBGRASpeedButton.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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end;
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destructor TBGRASpeedButton.Destroy;
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begin
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FBGRA.Free;
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inherited Destroy;
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end;
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{$ENDIF}
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end.
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