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mbColorLib: Initial commit (still some issues)
git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@5452 8e941d3f-bd1b-0410-a28a-d453659cc2b4
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290
components/mbColorLib/YColorPicker.pas
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290
components/mbColorLib/YColorPicker.pas
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unit YColorPicker;
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interface
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{$IFDEF FPC}
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{$MODE DELPHI}
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{$ENDIF}
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uses
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{$IFDEF FPC}
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LCLIntf, LCLType, LMessages,
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{$ELSE}
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Windows, Messages,
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{$ENDIF}
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SysUtils, Classes, Controls, Graphics, Forms,
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RGBCMYKUtils, mbTrackBarPicker, HTMLColors, Scanlines;
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type
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TYColorPicker = class(TmbTrackBarPicker)
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private
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FYellow, FMagenta, FCyan, FBlack: integer;
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FYBmp: TBitmap;
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function ArrowPosFromYellow(y: integer): integer;
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function YellowFromArrowPos(p: integer): integer;
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function GetSelectedColor: TColor;
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procedure SetSelectedColor(c: TColor);
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procedure CreateYGradient;
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procedure SetYellow(y: integer);
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procedure SetMagenta(m: integer);
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procedure SetCyan(c: integer);
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procedure SetBlack(k: integer);
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protected
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procedure CreateWnd; override;
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procedure Execute(tbaAction: integer); override;
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function GetArrowPos: integer; override;
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function GetSelectedValue: integer; override;
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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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published
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property Yellow: integer read FYellow write SetYellow default 255;
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property Magenta: integer read FMagenta write SetMagenta default 0;
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property Cyan: integer read FCyan write SetCyan default 0;
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property Black: integer read FBlack write SetBlack default 0;
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property SelectedColor: TColor read GetSelectedColor write SetSelectedColor default clRed;
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property Layout default lyVertical;
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end;
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procedure Register;
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implementation
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{$IFDEF FPC}
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{$R YColorPicker.dcr}
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{$ENDIF}
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procedure Register;
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begin
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RegisterComponents('mbColor Lib', [TYColorPicker]);
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end;
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{TYColorPicker}
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constructor TYColorPicker.Create(AOwner: TComponent);
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begin
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inherited;
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FYBmp := TBitmap.Create;
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FYBmp.PixelFormat := pf32bit;
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FYBmp.SetSize(12, 255);
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Width := 22;
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Height := 267;
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Layout := lyVertical;
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FYellow := 255;
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FMagenta := 0;
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FCyan := 0;
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FBlack := 0;
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FArrowPos := ArrowPosFromYellow(255);
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FChange := false;
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SetYellow(255);
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HintFormat := 'Yellow: %value';
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FManual := false;
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FChange := true;
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end;
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destructor TYColorPicker.Destroy;
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begin
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FYBmp.Free;
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inherited Destroy;
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end;
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procedure TYColorPicker.CreateWnd;
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begin
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inherited;
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CreateYGradient;
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end;
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procedure TYColorPicker.CreateYGradient;
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var
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i,j: integer;
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row: pRGBQuadArray;
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begin
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if FYBmp = nil then
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begin
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FYBmp := TBitmap.Create;
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FYBmp.PixelFormat := pf32bit;
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end;
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if Layout = lyHorizontal then
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begin
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FYBmp.width := 255;
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FYBmp.height := 12;
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for i := 0 to 254 do
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for j := 0 to 11 do
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begin
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row := FYBmp.Scanline[j];
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if not WebSafe then
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row[i] := RGBToRGBQuad(CMYKtoTColor(FCyan, FMagenta, i, FBlack))
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// FYBmp.Canvas.Pixels[i, j] := CMYKtoTColor(FCyan, FMagenta, i, FBlack)
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else
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row[i] := RGBToRGBQuad(GetWebSafe(CMYKtoTColor(FCyan, FMagenta, i, FBlack)));
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// FYBmp.Canvas.Pixels[i, j] := GetWebSafe(CMYKtoTColor(FCyan, FMagenta, i, FBlack));
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end;
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end
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else
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begin
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FYBmp.width := 12;
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FYBmp.height := 255;
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for i := 0 to 254 do
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begin
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row := FYBmp.Scanline[i];
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for j := 0 to 11 do
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if not WebSafe then
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row[j] := RGBToRGBQuad(CMYKtoTColor(FCyan, FMagenta, 255-i, FBlack))
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// FYBmp.Canvas.Pixels[j, i] := CMYKtoTColor(FCyan, FMagenta, 255-i, FBlack)
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else
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row[j] := RGBToRGBQuad(GetWebSafe(CMYKtoTColor(FCyan, FMagenta, 255-i, FBlack)));
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// FYBmp.Canvas.Pixels[j, i] := GetWebSafe(CMYKtoTColor(FCyan, FMagenta, 255-i, FBlack));
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end;
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end;
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end;
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procedure TYColorPicker.SetYellow(y: integer);
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begin
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if y < 0 then y := 0;
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if y > 255 then y := 255;
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if FYellow <> y then
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begin
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FYellow := y;
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FArrowPos := ArrowPosFromYellow(y);
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FManual := false;
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Invalidate;
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if FChange then
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if Assigned(OnChange) then OnChange(Self);
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end;
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end;
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procedure TYColorPicker.SetMagenta(m: integer);
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begin
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if m > 255 then m := 255;
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if m < 0 then m := 0;
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if FMagenta <> m then
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begin
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FMagenta := m;
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FManual := false;
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CreateYGradient;
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Invalidate;
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if FChange then
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if Assigned(OnChange) then OnChange(Self);
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end;
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end;
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procedure TYColorPicker.SetCyan(c: integer);
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begin
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if c > 255 then c := 255;
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if c < 0 then c := 0;
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if FCyan <> c then
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begin
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FCyan := c;
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FManual := false;
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CreateYGradient;
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Invalidate;
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if FChange then
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if Assigned(OnChange) then OnChange(Self);
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end;
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end;
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procedure TYColorPicker.SetBlack(k: integer);
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begin
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if k > 255 then k := 255;
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if k < 0 then k := 0;
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if FBlack <> k then
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begin
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FBlack := k;
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FManual := false;
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CreateYGradient;
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Invalidate;
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if FChange then
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if Assigned(OnChange) then OnChange(Self);
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end;
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end;
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function TYColorPicker.ArrowPosFromYellow(y: integer): integer;
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var
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a: integer;
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begin
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if Layout = lyHorizontal then
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begin
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a := Round(((Width - 12)/255)*y);
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if a > Width - FLimit then a := Width - FLimit;
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end
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else
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begin
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y := 255 - y;
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a := Round(((Height - 12)/255)*y);
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if a > Height - FLimit then a := Height - FLimit;
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end;
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if a < 0 then a := 0;
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Result := a;
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end;
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function TYColorPicker.YellowFromArrowPos(p: integer): integer;
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var
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r: integer;
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begin
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if Layout = lyHorizontal then
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r := Round(p/((Width - 12)/255))
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else
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r := Round(255 - p/((Height - 12)/255));
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if r < 0 then r := 0;
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if r > 255 then r := 255;
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Result := r;
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end;
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function TYColorPicker.GetSelectedColor: TColor;
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begin
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if not WebSafe then
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Result := CMYKtoTColor(FCyan, FMagenta, FYellow, FBlack)
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else
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Result := GetWebSafe(CMYKtoTColor(FCyan, FMagenta, FYellow, FBlack));
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end;
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function TYColorPicker.GetSelectedValue: integer;
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begin
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Result := FYellow;
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end;
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procedure TYColorPicker.SetSelectedColor(c: TColor);
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var
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cy, m, y, k: integer;
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begin
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if WebSafe then c := GetWebSafe(c);
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ColorToCMYK(c, cy, m, y, k);
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FChange := false;
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SetMagenta(m);
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SetCyan(cy);
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SetBlack(k);
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SetYellow(y);
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FManual := false;
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FChange := true;
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if Assigned(OnChange) then OnChange(Self);
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end;
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function TYColorPicker.GetArrowPos: integer;
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begin
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Result := ArrowPosFromYellow(FYellow);
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end;
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procedure TYColorPicker.Execute(tbaAction: integer);
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begin
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case tbaAction of
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TBA_Resize: SetYellow(FYellow);
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TBA_Paint: Canvas.StretchDraw(FPickRect, FYBmp);
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TBA_MouseMove: FYellow := YellowFromArrowPos(FArrowPos);
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TBA_MouseDown: FYellow := YellowFromArrowPos(FArrowPos);
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TBA_MouseUp: FYellow := YellowFromArrowPos(FArrowPos);
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TBA_WheelUp: SetYellow(FYellow + Increment);
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TBA_WheelDown: SetYellow(FYellow - Increment);
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TBA_VKRight: SetYellow(FYellow + Increment);
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TBA_VKCtrlRight: SetYellow(255);
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TBA_VKLeft: SetYellow(FYellow - Increment);
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TBA_VKCtrlLeft: SetYellow(0);
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TBA_VKUp: SetYellow(FYellow + Increment);
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TBA_VKCtrlUp: SetYellow(255);
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TBA_VKDown: SetYellow(FYellow - Increment);
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TBA_VKCtrlDown: SetYellow(0);
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TBA_RedoBMP: CreateYGradient;
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end;
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end;
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end.
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