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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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286
components/mbColorLib/CColorPicker.pas
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286
components/mbColorLib/CColorPicker.pas
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unit CColorPicker;
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{$IFDEF FPC}
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{$MODE DELPHI}
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{$ENDIF}
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interface
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uses
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{$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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TCColorPicker = class(TmbTrackBarPicker)
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private
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FCyan, FMagenta, FYellow, FBlack: integer;
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FCBmp: TBitmap;
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function ArrowPosFromCyan(c: integer): integer;
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function CyanFromArrowPos(p: integer): integer;
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function GetSelectedColor: TColor;
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procedure SetSelectedColor(c: TColor);
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procedure CreateCGradient;
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procedure SetCyan(c: integer);
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procedure SetMagenta(m: integer);
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procedure SetYellow(y: 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 Cyan: integer read FCyan write SetCyan default 255;
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property Magenta: integer read FMagenta write SetMagenta default 0;
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property Yellow: integer read FYellow write SetYellow 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 CColorPicker.dcr}
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{$ENDIF}
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procedure Register;
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begin
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RegisterComponents('mbColor Lib', [TCColorPicker]);
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end;
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{TCColorPicker}
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constructor TCColorPicker.Create(AOwner: TComponent);
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begin
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inherited;
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FCBmp := TBitmap.Create;
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FCBmp.PixelFormat := pf32bit;
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FCBmp.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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FCyan := 255;
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FMagenta := 0;
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FYellow := 0;
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FBlack := 0;
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FArrowPos := ArrowPosFromCyan(255);
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FChange := false;
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SetCyan(255);
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HintFormat := 'Cyan: %value';
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FManual := false;
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FChange := true;
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end;
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destructor TCColorPicker.Destroy;
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begin
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FCBmp.Free;
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inherited Destroy;
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end;
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procedure TCColorPicker.CreateWnd;
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begin
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inherited;
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CreateCGradient;
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end;
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procedure TCColorPicker.CreateCGradient;
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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 FCBmp = nil then
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begin
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FCBmp := TBitmap.Create;
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FCBmp.PixelFormat := pf32bit;
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end;
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if Layout = lyHorizontal then
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begin
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FCBmp.width := 255;
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FCBmp.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 := FCBmp.Scanline[j];
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if not WebSafe then
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row[i] := RGBToRGBQuad(CMYKtoTColor(i, FMagenta, FYellow, FBlack))
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else
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row[i] := RGBToRGBQuad(GetWebSafe(CMYKtoTColor(i, FMagenta, FYellow, 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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FCBmp.width := 12;
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FCBmp.height := 255;
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for i := 0 to 254 do
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begin
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row := FCBmp.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(255-i, FMagenta, FYellow, FBlack))
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else
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row[j] := RGBtoRGBQuad(GetWebSafe(CMYKtoTColor(255-i, FMagenta, FYellow, FBlack)));
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end;
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end;
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end;
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procedure TCColorPicker.SetCyan(C: integer);
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begin
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if C < 0 then C := 0;
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if C > 255 then C := 255;
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if FCyan <> c then
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begin
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FCyan := c;
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FArrowPos := ArrowPosFromCyan(c);
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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 TCColorPicker.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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CreateCGradient;
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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 TCColorPicker.SetYellow(y: integer);
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begin
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if y > 255 then y := 255;
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if y < 0 then y := 0;
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if FYellow <> y then
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begin
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FYellow := y;
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FManual := false;
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CreateCGradient;
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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 TCColorPicker.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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CreateCGradient;
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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 TCColorPicker.ArrowPosFromCyan(c: 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)*c);
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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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c := 255 - c;
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a := Round(((Height - 12)/255)*c);
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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 TCColorPicker.CyanFromArrowPos(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 TCColorPicker.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 TCColorPicker.GetSelectedValue: integer;
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begin
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Result := FCyan;
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end;
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procedure TCColorPicker.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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SetYellow(y);
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SetBlack(k);
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SetCyan(cy);
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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 TCColorPicker.GetArrowPos: integer;
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begin
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Result := ArrowPosFromCyan(FCyan);
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end;
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procedure TCColorPicker.Execute(tbaAction: integer);
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begin
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case tbaAction of
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TBA_Resize: SetCyan(FCyan);
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TBA_Paint: Canvas.StretchDraw(FPickRect, FCBmp);
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TBA_MouseMove: FCyan := CyanFromArrowPos(FArrowPos);
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TBA_MouseDown: FCyan := CyanFromArrowPos(FArrowPos);
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TBA_MouseUp: FCyan := CyanFromArrowPos(FArrowPos);
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TBA_WheelUp: SetCyan(FCyan + Increment);
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TBA_WheelDown: SetCyan(FCyan - Increment);
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TBA_VKRight: SetCyan(FCyan + Increment);
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TBA_VKCtrlRight: SetCyan(255);
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TBA_VKLeft: SetCyan(FCyan - Increment);
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TBA_VKCtrlLeft: SetCyan(0);
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TBA_VKUp: SetCyan(FCyan + Increment);
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TBA_VKCtrlUp: SetCyan(255);
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TBA_VKDown: SetCyan(FCyan - Increment);
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TBA_VKCtrlDown: SetCyan(0);
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TBA_RedoBMP: CreateCGradient;
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end;
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end;
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end.
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