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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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wp_xxyyzz
511
components/mbColorLib/HRingPicker.pas
Normal file
511
components/mbColorLib/HRingPicker.pas
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@@ -0,0 +1,511 @@
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unit HRingPicker;
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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, Math, RGBHSVUtils,
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Forms, {IFDEF DELPHI_7_UP Themes, $ENDIF} HTMLColors, mbColorPickerControl,
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Scanlines;
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type
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THRingPicker = class(TmbColorPickerControl)
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private
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FHue, FSat, FValue: integer;
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FHueLineColor: TColor;
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FSelectedColor: TColor;
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FOnChange: TNotifyEvent;
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FManual: boolean;
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mx, my, mdx, mdy: integer;
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Fchange: boolean;
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FRadius: integer;
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FBMP: TBitmap;
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FDoChange: boolean;
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procedure CreateHSVCircle;
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function RadHue(New: integer): integer;
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procedure SetRadius(r: integer);
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procedure SetValue(v: integer);
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procedure SetHue(h: integer);
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procedure SetSat(s: integer);
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procedure SetHueLineColor(c: TColor);
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procedure DrawHueLine;
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procedure SelectionChanged(x, y: integer);
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procedure UpdateCoords;
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protected
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function GetSelectedColor: TColor; override;
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procedure WebSafeChanged; override;
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procedure SetSelectedColor(c: TColor); override;
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procedure Paint; override;
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procedure Resize; override;
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procedure CreateWnd; override;
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procedure MouseMove(Shift: TShiftState; X, Y: Integer); override;
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procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Integer); override;
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procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Integer); override;
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procedure CNKeyDown(var Message: {$IFDEF FPC}TLMKeyDown{$ELSE}TWMKeyDown{$ENDIF});
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message CN_KEYDOWN;
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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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function GetColorAtPoint(x, y: integer): TColor; override;
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property Manual: boolean read FManual;
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published
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property Hue: integer read FHue write SetHue default 0;
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property Saturation: integer read FSat write SetSat default 0;
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property Value: integer read FValue write SetValue default 255;
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property HueLineColor: TColor read FHueLineColor write SetHueLineColor default clGray;
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property SelectedColor default clNone;
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property Radius: integer read FRadius write SetRadius default 30;
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property OnChange: TNotifyEvent read FOnChange write FOnChange;
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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 HRingPicker.dcr}
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{$ENDIF}
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procedure Register;
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begin
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RegisterComponents('mbColor Lib', [THRingPicker]);
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end;
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function PointInCirc(p: TPoint; size : integer): boolean;
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var
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r: integer;
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begin
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r := size div 2;
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Result := (SQR(p.x - r) + SQR(p.y - r) <= SQR(r));
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end;
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constructor THRingPicker.Create(AOwner: TComponent);
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begin
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inherited;
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FBMP := TBitmap.Create;
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FBMP.PixelFormat := pf32bit;
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Width := 204;
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Height := 204;
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FValue := 255;
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FHue := 0;
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FSat := 0;
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FHueLineColor := clGray;
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FSelectedColor := clNone;
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FManual := false;
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Fchange := true;
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FRadius := 30;
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FDoChange := false;
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end;
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destructor THRingPicker.Destroy;
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begin
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FBMP.Free;
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inherited;
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end;
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procedure THRingPicker.CreateHSVCircle;
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var
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dSquared, H, S, V, i, j, Radius, RadiusSquared, x, y, size: integer;
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row: pRGBQuadArray;
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tc: TColor;
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begin
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if FBMP = nil then
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begin
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FBMP := TBitmap.Create;
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FBMP.PixelFormat := pf32bit;
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end;
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size := Min(Width, Height);
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FBMP.Width := size;
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FBMP.Height := size;
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Radius := size div 2;
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RadiusSquared := Radius*Radius;
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PaintParentBack(FBMP.Canvas);
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V := FValue;
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for j := 0 to size - 1 do
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begin
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Y := Size - 1 - j - Radius;
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row := FBMP.Scanline[Size - 1 - j];
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for i := 0 to size - 1 do
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begin
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X := i - Radius;
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dSquared := X*X + Y*Y;
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if dSquared <= RadiusSquared then
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begin
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if Radius <> 0 then
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S := ROUND((255*SQRT(dSquared))/Radius)
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else
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S := 0;
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H := ROUND( 180 * (1 + ArcTan2(X, Y) / PI));
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H := H + 90;
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if H > 360 then H := H - 360;
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if not WebSafe then
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row[i] := HSVtoRGBQuad(H,S,V)
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else
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begin
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tc := GetWebSafe(HSVtoColor(H, S, V));
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row[i] := RGBtoRGBQuad(GetRValue(tc), GetGValue(tc), GetBValue(tc));
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end;
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end
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end;
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end;
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end;
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procedure THRingPicker.Resize;
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begin
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inherited;
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CreateHSVCircle;
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UpdateCoords;
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end;
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procedure THRingPicker.CreateWnd;
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begin
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inherited;
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CreateHSVCircle;
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UpdateCoords;
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end;
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procedure THRingPicker.UpdateCoords;
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var
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r, angle: real;
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radius: integer;
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begin
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radius := Min(Width, Height) div 2;
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r := -MulDiv(radius, FSat, 255);
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angle := -FHue*PI/180 - PI;
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mdx := ROUND(COS(angle)*ROUND(r)) + radius;
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mdy := ROUND(SIN(angle)*ROUND(r)) + radius;
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end;
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procedure THRingPicker.SetHue(h: integer);
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begin
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if h > 360 then h := 360;
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if h < 0 then h := 0;
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if FHue <> h then
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begin
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FHue := h;
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FManual := false;
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UpdateCoords;
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Invalidate;
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if Fchange then
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if Assigned(FOnChange) then FOnChange(Self);
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end;
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end;
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procedure THRingPicker.SetSat(s: integer);
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begin
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if s > 255 then s := 255;
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if s < 0 then s := 0;
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if FSat <> s then
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begin
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FSat := s;
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FManual := false;
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UpdateCoords;
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Invalidate;
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if Fchange then
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if Assigned(FOnChange) then FOnChange(Self);
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end;
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end;
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procedure THRingPicker.SetValue(v: integer);
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begin
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if V > 255 then V := 255;
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if V < 0 then V := 0;
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if FValue <> V then
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begin
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FValue := V;
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FManual := false;
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CreateHSVCircle;
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Invalidate;
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if Fchange then
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if Assigned(FOnChange) then FOnChange(Self);
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end;
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end;
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procedure THRingPicker.SetHueLineColor(c: TColor);
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begin
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if FHueLineColor <> c then
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begin
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FHueLineColor := c;
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Invalidate;
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end;
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end;
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procedure THRingPicker.SetRadius(r: integer);
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begin
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if FRadius <> r then
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begin
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FRadius := r;
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Invalidate;
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end;
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end;
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procedure THRingPicker.DrawHueLine;
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var
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angle: double;
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radius: integer;
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begin
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Radius := Min(Width, Height) div 2;
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if (FHue >= 0) and (FHue <= 360) then
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begin
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Angle := -FHue*PI/180;
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Canvas.Pen.Color := FHueLineColor;
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Canvas.MoveTo(Radius,Radius);
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Canvas.LineTo(Radius + Round(Radius*COS(angle)), Radius + Round(Radius*SIN(angle)));
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end;
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end;
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procedure THRingPicker.Paint;
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var
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rgn, r1, r2: HRGN;
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r: TRect;
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begin
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PaintParentBack(Canvas);
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r := ClientRect;
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r.Right := R.Left + Min(Width, Height);
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R.Bottom := R.Top + Min(Width, Height);
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r1 := CreateEllipticRgnIndirect(R);
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rgn := r1;
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InflateRect(R, - Min(Width, Height) + FRadius, - Min(Width, Height) + FRadius);
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r2 := CreateEllipticRgnIndirect(R);
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CombineRgn(rgn, r1, r2, RGN_DIFF);
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SelectClipRgn(Canvas.Handle, rgn);
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Canvas.Draw(0, 0, FBMP);
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DeleteObject(rgn);
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DrawHueLine;
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if FDoChange then
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begin
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if Assigned(FOnChange) then FOnChange(Self);
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FDoChange := false;
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end;
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end;
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procedure THRingPicker.SelectionChanged(x, y: integer);
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var
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Angle, Distance, xDelta, yDelta, Radius: integer;
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begin
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if not PointInCirc(Point(x, y), Min(Width, Height)) then
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begin
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FChange := false;
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SetSelectedColor(clNone);
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FChange := true;
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Exit;
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end
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else
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FSelectedColor := clWhite;
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Radius := Min(Width, Height) div 2;
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xDelta := x - Radius;
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yDelta := y - Radius;
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Angle := ROUND(360 + 180*ArcTan2(-yDelta,xDelta)/PI);
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if Angle < 0 then Inc(Angle, 360)
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else if Angle > 360 then
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Dec(Angle, 360);
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Fchange := false;
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SetHue(Angle);
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Distance := ROUND(SQRT(SQR(xDelta) + SQR(yDelta)));
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if Distance >= Radius then SetSat(255)
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else SetSat(MulDiv(Distance, 255, Radius));
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Fchange := true;
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end;
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procedure THRingPicker.MouseUp(Button: TMouseButton; Shift: TShiftState;
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X, Y: Integer);
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begin
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inherited;
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{$IFDEF DELPHI}
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ClipCursor(nil);
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{$ENDIF}
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if csDesigning in ComponentState then Exit;
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if (Button = mbLeft) and PointInCirc(Point(x, y), Min(Width, Height)) then
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begin
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mdx := x;
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mdy := y;
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FDoChange := true;
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SelectionChanged(X, Y);
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FManual := true;
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end;
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end;
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procedure THRingPicker.MouseDown(Button: TMouseButton; Shift: TShiftState;
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X, Y: Integer);
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var
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R: TRect;
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begin
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inherited;
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if csDesigning in ComponentState then Exit;
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if (Button = mbLeft) and PointInCirc(Point(x, y), Min(Width, Height)) then
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begin
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mdx := x;
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mdy := y;
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R := ClientRect;
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InflateRect(R, 1, 1);
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R.TopLeft := ClientToScreen(R.TopLeft);
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R.BottomRight := ClientToScreen(R.BottomRight);
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{$IFDEF DELPHI}
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ClipCursor(@R);
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{$ENDIF}
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FDoChange := true;
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SelectionChanged(X, Y);
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FManual := true;
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end;
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SetFocus;
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end;
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procedure THRingPicker.MouseMove(Shift: TShiftState; X, Y: Integer);
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begin
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inherited;
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if csDesigning in ComponentState then Exit;
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if (ssLeft in Shift) and PointInCirc(Point(x, y), Min(Width, Height)) then
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begin
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mdx := x;
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mdy := y;
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FDoChange := true;
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SelectionChanged(X, Y);
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FManual := true;
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end;
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end;
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function THRingPicker.GetSelectedColor: TColor;
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begin
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if FSelectedColor <> clNone then
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begin
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if not WebSafe then
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Result := HSVtoColor(FHue, FSat, FValue)
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else
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Result := GetWebSafe(HSVtoColor(FHue, FSat, FValue));
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end
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else
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Result := clNone;
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end;
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function THRingPicker.GetColorAtPoint(x, y: integer): TColor;
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var
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Angle, Distance, xDelta, yDelta, Radius: integer;
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h, s: integer;
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begin
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Radius := Min(Width, Height) div 2;
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xDelta := x - Radius;
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yDelta := y - Radius;
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Angle := ROUND(360 + 180*ArcTan2(-yDelta,xDelta)/PI);
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if Angle < 0 then Inc(Angle, 360)
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else if Angle > 360 then
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Dec(Angle, 360);
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h := Angle;
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Distance := ROUND(SQRT(SQR(xDelta) + SQR(yDelta)));
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if Distance >= Radius then s := 255
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else s := MulDiv(Distance, 255, Radius);
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if PointInCirc(Point(mx, my), Min(Width, Height)) then
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begin
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if not WebSafe then
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Result := HSVtoColor(h, s, FValue)
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else
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Result := GetWebSafe(HSVtoColor(h, s, FValue));
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end
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else
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Result := clNone;
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end;
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procedure THRingPicker.SetSelectedColor(c: TColor);
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var
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changeSave: boolean;
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begin
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if WebSafe then c := GetWebSafe(c);
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changeSave := FChange;
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FManual := false;
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Fchange := false;
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SetValue(GetVValue(c));
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SetHue(GetHValue(c));
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SetSat(GetSValue(c));
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FSelectedColor := c;
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Fchange := changeSave;
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if Fchange then
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if Assigned(FOnChange) then FOnChange(Self);
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FChange := true;
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end;
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function THRingPicker.RadHue(New: integer): integer;
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begin
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if New < 0 then New := New + 360;
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if New > 360 then New := New - 360;
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Result := New;
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end;
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procedure THRingPicker.CNKeyDown(
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var Message: {$IFDEF FPC}TLMKeyDown{$ELSE}TWMKeyDown{$ENDIF} );
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var
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Shift: TShiftState;
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FInherited: boolean;
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begin
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FInherited := false;
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Shift := KeyDataToShiftState(Message.KeyData);
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if not (ssCtrl in Shift) then
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case Message.CharCode of
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VK_LEFT:
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begin
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FChange := false;
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SetHue(RadHue(FHue + 1));
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FChange := true;
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FManual := true;
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if Assigned(FOnChange) then FOnChange(Self);
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end;
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VK_RIGHT:
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begin
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FChange := false;
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SetHue(RadHue(FHue - 1));
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FChange := true;
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FManual := true;
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if Assigned(FOnChange) then FOnChange(Self);
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end
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else
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begin
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FInherited := true;
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inherited;
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end;
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end
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else
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case Message.CharCode of
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VK_LEFT:
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begin
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FChange := false;
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SetHue(RadHue(FHue + 10));
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FChange := true;
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FManual := true;
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if Assigned(FOnChange) then FOnChange(Self);
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end;
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VK_RIGHT:
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begin
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FChange := false;
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SetHue(RadHue(FHue - 10));
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FChange := true;
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FManual := true;
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if Assigned(FOnChange) then FOnChange(Self);
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end
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else
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begin
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FInherited := true;
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inherited;
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end;
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end;
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if not FInherited then
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if Assigned(OnKeyDown) then
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OnKeyDown(Self, Message.CharCode, Shift);
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end;
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procedure THRingPicker.WebSafeChanged;
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begin
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inherited;
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CreateHSVCircle;
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Invalidate;
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end;
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end.
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Reference in New Issue
Block a user