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00010 #ifndef QWT_KNOB_H
00011 #define QWT_KNOB_H
00012
00013 #include "qwt_global.h"
00014 #include "qwt_sldbase.h"
00015 #include "qwt_sclif.h"
00016
00032 class QWT_EXPORT QwtKnob : public QwtSliderBase, public QwtScaleIf
00033 {
00034 Q_OBJECT
00035 Q_ENUMS (Symbol)
00036 Q_PROPERTY( int knobWidth READ knobWidth WRITE setKnobWidth )
00037 Q_PROPERTY( int borderWidth READ borderWidth WRITE setBorderWidth )
00038 Q_PROPERTY( double totalAngle READ totalAngle WRITE setTotalAngle )
00039 Q_PROPERTY( Symbol symbol READ symbol WRITE setSymbol )
00040
00041 public:
00047 enum Symbol { Line, Dot };
00048
00049 QwtKnob(QWidget* parent = 0, const char *name = 0);
00050 virtual ~QwtKnob();
00051
00052 void setKnobWidth(int w);
00053 void setTotalAngle (double angle);
00054 void setBorderWidth(int bw);
00055
00057 int knobWidth() const {return d_knobWidth;};
00059 double totalAngle() const {return d_totalAngle;};
00061 int borderWidth() const {return d_borderWidth;};
00062
00063 void setSymbol(Symbol);
00064 Symbol symbol() const;
00065
00066 virtual QSize sizeHint() const;
00067 virtual QSize minimumSizeHint() const;
00068
00069 protected:
00070 virtual void paintEvent(QPaintEvent *e);
00071 virtual void resizeEvent(QResizeEvent *e);
00072
00073 void draw(QPainter *p, const QRect& ur);
00074 void drawKnob(QPainter *p, const QRect &r);
00075 void drawMarker(QPainter *p, double arc, const QColor &c);
00076
00077 private:
00078 void layoutKnob( bool update = TRUE );
00079 double getValue(const QPoint &p);
00080 void getScrollMode( const QPoint &p, int &scrollMode, int &direction );
00081 void recalcAngle();
00082
00083 virtual void valueChange();
00084 virtual void rangeChange();
00085 virtual void scaleChange();
00086 virtual void fontChange(const QFont &oldFont);
00087
00088 int d_borderWidth;
00089 int d_borderDist;
00090 int d_hasScale;
00091 int d_scaleDist;
00092 int d_maxScaleTicks;
00093 int d_knobWidth;
00094 int d_dotWidth;
00095
00096 Symbol d_symbol;
00097 double d_angle;
00098 double d_oldAngle;
00099 double d_totalAngle;
00100 double d_nTurns;
00101
00102 QRect d_kRect;
00103 };
00104
00105 #endif
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