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| unit MMKnopf;
interface uses Windows, Controls, Classes, Types, Variants, Math, Graphics, mmUtils, Dialogs, SysUtils, ExtCtrls, GraphUtil;
type TonChange = procedure (Sender: TObject; Value: Integer) of Object; TonMessage = procedure (Sender: TObject; msg: String) of Object;
TDrehKnopf = class(TGraphicControl) private pWert,pWinkel: Integer; pTickerInt:Integer; pMin,pMax,pRand,pRadius: Integer; pTurn: Boolean; pTicker: Boolean; pMinW, pMaxW: Integer; pBorder: Boolean; pColor, pBack: TColor;
FonChange : TonChange; FonMessage : TonMessage;
procedure setBool(Index: Integer; val: Boolean); procedure setColor(Index: Integer; val:TColor); procedure setInts(Index,val:Integer);
function Wert2Winkel(val:Integer):Single; function Winkel2Wert(val:Single):Integer; function Blend(const Factor: Double; const Color1, Color2: TColor): TColor; protected procedure Paint();override; procedure Resize();override;
procedure MouseDown(Button: TMouseButton ;Shift : TShiftState;X,Y : Integer);override; procedure MouseUp(Button: TMouseButton ;Shift : TShiftState;X,Y : Integer);override; procedure MouseMove(Shift : TShiftState;X,Y : Integer);override; public constructor Create(AOwner: TComponent);override; destructor Destroy();override; published property Min:Integer Index 0 read pMin write setInts; property Max:Integer Index 1 read pMax write setInts; property Value:Integer Index 2 read pWert write setInts; property MinWinkel: Integer Index 3 read pMinW write setInts; property MaxWinkel: Integer Index 4 read pMaxW write setInts; property ShowTicker: Boolean Index 1 read pTicker write setBool; property TickerInt:Integer Index 7 read pTickerInt write setInts; property Border:Boolean Index 0 read pBorder write setBool; property BackColor:TColor Index 0 read pBack write setColor; property Color:TColor Index 1 read pColor write setColor; property RandBreite:Integer Index 5 read pRand write setInts; property Radius:Integer Index 6 read pRadius write setInts;
property onChange:TonChange read FonChange write FonChange; property onMessage:TonMessage read FonMessage write FonMessage; property onClick; property onDblClick; end;
const HalfPi = 1.57079632679489661923;
procedure register;
implementation {$R MMKnopf.res}
Constructor TDrehKnopf.Create(AOwner: TComponent); begin inherited Create(AOwner); Color := clBlue; pMin := 0; pMax := 100; pMinW := 20; pMaxW := 340; pWert := 0; pWinkel := Floor(Wert2Winkel(pWert)); pTurn := False; pTicker := True; pTickerInt := 10; pBorder := True; pBack := clBtnFace; pColor := clBlack; pRadius := 100; pRand := 10; end;
Destructor TDrehKnopf.Destroy; begin inherited Destroy; end;
function TDrehKnopf.Blend(const Factor: Double; const Color1, Color2: TColor): TColor; var Factor2: Double; begin Factor2 := 1.0 - Factor; with TRGBQuad(Result) do begin rgbBlue := Trunc(Factor * TRGBQuad(Color1).rgbBlue + Factor2 * TRGBQuad(Color2).rgbBlue); rgbGreen := Trunc(Factor * TRGBQuad(Color1).rgbGreen + Factor2 * TRGBQuad(Color2).rgbGreen); rgbRed := Trunc(Factor * TRGBQuad(Color1).rgbRed + Factor2 * TRGBQuad(Color2).rgbRed); rgbReserved := 0; end; end;
procedure TDrehKnopf.Paint; var ra,px,py,mp,r1,r2,v,u,i,Size: Integer; p1,p2: TPoint; w: Single; c1,c2,c3: TColor; begin with Self.Canvas do begin Pen.Style := psClear; Pen.Width := 1; if pBorder then pen.Style := psSolid; Pen.Color := pColor; Brush.Color := pBack; Brush.Style := bsClear;
mp := Floor(pRadius * 10 / 8); Pen.Style := psSolid; Pen.Color := clBlack; c1 := ColorAdjustLuma(pBack,50,False); c2 := ColorAdjustLuma(pBack,-50,False);
Brush.Color := c1; Brush.Style := bsclear; r1 := mp - pRadius; r2 := mp + pRadius; Size := r2 - r1 + 1;
Brush.Style := bsSolid; Pen.Style := psClear; for i := 0 to Size do begin c3 := Blend(Cos(I * HalfPi / Size), c1, pBack); Brush.Color := c3; Pie(r1, r1, r2, r2, r1 + i + 1,r1,r1 + i - 1,r1); Pie(r1, r1, r2, r2, r1, r1 + i - 1, r1, r1 + i + 1); end;
for i := 0 to Size do begin c3 := Blend(Cos(I * HalfPi / Size), pBack, c2); Brush.Color := c3; Pie(r1, r1, r2, r2, r2,r1 + i + 1,r2,r1 + i - 1); Pie(r1, r1, r2, r2, r1 + i - 1, r2, r1 + i + 1, r2); end;
Pen.Style := psSolid; Brush.Style := bsClear; Ellipse(r1,r1,r2,r2);
r1 := mp - pRadius + pRand; r2 := mp + pRadius - pRand; Brush.Color := pBack; Brush.Style := bsSolid; Pen.Style := psClear; Ellipse(r1,r1,r2,r2);
Pen.Style := psSolid; w := pWinkel; w := DegToRad(w); u := Floor(pRadius/4); px := mp - Floor(sin(w) * (pRadius - pRand)); py := mp + Floor(cos(w) * (pRadius - pRand)); MoveTo(px,py); px := mp - Floor(sin(w) * (pRadius - pRand - u)); py := mp + Floor(cos(w) * (pRadius - pRand - u)); LineTo(px,py);
if pTicker then begin v := pMin; repeat w := Wert2Winkel(v); w := DegToRad(w); if (v = pMin) OR ((v mod 50) = 0) then Pen.Width := 2 else Pen.Width := 1; ra := mp; px := mp - Floor(sin(w) * pRadius); py := mp + Floor(cos(w) * pRadius); MoveTo(px,py); ra := Floor(mp/10*8); px := mp - Floor(sin(w) * mp); py := mp + Floor(cos(w) * mp); LineTo(px,py);
v := v + pTickerInt; until (v > pMax); v := v - pTickerInt; w := Wert2Winkel(v); w := DegToRad(w); Pen.Width := 2; ra := mp; px := mp - Floor(sin(w) * pRadius); py := mp + Floor(cos(w) * pRadius); MoveTo(px,py); ra := Floor(mp/10*8); px := mp - Floor(sin(w) * mp); py := mp + Floor(cos(w) * mp); LineTo(px,py); end; end; end;
procedure TDrehKnopf.Resize; begin if csDesigning in Self.ComponentState then begin if Width > Height then pRadius := Floor(Height / 20 * 8) else pRadius := Floor(Width / 20 * 8); end; inherited; end;
procedure TDrehKnopf.setInts(Index: Integer; val: Integer); begin case index of 0: begin pMin := val; end; 1: begin pMax := val; end; 2: begin if (val >= pMin) and (val <= pMax) then begin pWert := val; pWinkel := Floor(Wert2Winkel(val)); end; end; 3: begin pMinW := val; end; 4: begin pMaxW := val; end; 5: begin if (val > -1) AND ( val < pRadius) then begin pRand := val; end; end; 6: begin if (val > 0) then begin pRadius := val; end; end; 7: begin if val > 0 then pTickerInt := val; end; end; Repaint; end;
procedure TDrehKnopf.setColor(Index: Integer; val: TColor); begin case Index of 0: begin pBack := val; end; 1: begin pColor := val; end; end; Repaint; end;
procedure TDrehKnopf.setBool(Index: Integer; val: Boolean); begin case Index of 0: begin pBorder := val; end; 1: begin pTicker := val; end; end; Repaint; end;
procedure TDrehKnopf.MouseDown(Button: TMouseButton; Shift: TShiftState; X: Integer; Y: Integer); var mp,v,w: Integer; p1,p2: TPoint; begin pTurn := True; Inherited; end;
procedure TDrehKnopf.MouseUp(Button: TMouseButton; Shift: TShiftState; X: Integer; Y: Integer); begin pTurn := False; inherited; end;
procedure TDrehKnopf.MouseMove(Shift: TShiftState; X: Integer; Y: Integer); var mp,v,w: Integer; p1,p2: TPoint; begin inherited; if not pTurn then exit;
mp := Floor(pRadius * 10 / 8); p1 := Point(mp,mp); p2 := Point(X,Y); w := Floor(KoordToWink(p1,p2)); w := w + 90; if w > 359 then w := w - 360; if not(w >= pMinW) then w := pMinW; if w > pMaxw then w := pMaxw;
v := Winkel2Wert(w); if Assigned(FonChange) then FonChange(Self,v); pWinkel := w; pWert := v; Repaint; end;
function TDrehKnopf.Wert2Winkel(val: Integer):Single; var res : Single; begin res := ((val-pMin) * (pMaxw - pMinw)) / (pMax - pMin) + pMinw;
Result := res; end;
function TDrehKnopf.Winkel2Wert(val: Single):Integer; var res: Integer; begin res := Floor((pMax - pMin) * (val-pMinw) / (pMaxw - pMinw)); res := res + pMin;
Result := res; end;
procedure Register; begin RegisterComponents('mtm', [TDrehKnopf]); end;
end. |