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qwt_wheel.h

00001 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
00002  * Qwt Widget Library
00003  * Copyright (C) 1997   Josef Wilgen
00004  * Copyright (C) 2002   Uwe Rathmann
00005  *
00006  * This library is free software; you can redistribute it and/or
00007  * modify it under the terms of the Qwt License, Version 1.0
00008  *****************************************************************************/
00009 
00010 #ifndef QWT_WHEEL_H
00011 #define QWT_WHEEL_H
00012 
00013 #include "qwt_global.h"
00014 #include "qwt_sldbase.h"
00015 
00025 class QWT_EXPORT QwtWheel : public QwtSliderBase
00026 {
00027     Q_OBJECT 
00028     Q_PROPERTY( double totalAngle READ totalAngle WRITE setTotalAngle )
00029     Q_PROPERTY( double viewAngle READ viewAngle WRITE setViewAngle )
00030     Q_PROPERTY( int    tickCnt READ tickCnt WRITE setTickCnt )
00031     Q_PROPERTY( int    internalBorder READ internalBorder WRITE setInternalBorder )
00032     Q_PROPERTY( double mass READ mass WRITE setMass )
00033             
00034 public:
00035     QwtWheel(QWidget *parent = 0, const char *name = 0);
00036     virtual ~QwtWheel();
00037 
00038     virtual void setOrientation(Qt::Orientation);
00039 
00040     double totalAngle() const {return d_totalAngle;}
00041         double viewAngle() const {return d_viewAngle;}
00042     int tickCnt() const {return d_tickCnt;}
00043     int internalBorder() const {return d_intBorder;}
00044         double mass() const;
00045 
00046     void setTotalAngle (double angle);
00047     void setTickCnt(int cnt);
00048     void setViewAngle(double angle);
00049     void setInternalBorder(int width);
00050     void setMass(double val);
00051     void setWheelWidth( int w );
00052 
00053     virtual QSize sizeHint() const;
00054     virtual QSize minimumSizeHint() const;
00055     virtual QSizePolicy sizePolicy() const;
00056 
00057 protected:
00058     virtual void resizeEvent(QResizeEvent *e);
00059     virtual void paintEvent(QPaintEvent *e);
00060 
00061     void layoutWheel( bool update = TRUE );
00062     void draw(QPainter *p, const QRect& update_rect);
00063     void drawWheel(QPainter *p, const QRect &r);
00064     void drawWheelBackground(QPainter *p, const QRect &r);
00065     void setColorArray();
00066 
00067     virtual void valueChange();
00068     virtual void paletteChange( const QPalette &);
00069 
00070     virtual double getValue(const QPoint &p);
00071     virtual void getScrollMode(const QPoint &p, 
00072         int &scrollMode, int &direction);
00073 
00074 private:
00075     QColor* d_colors;
00076     QRect d_sliderRect;
00077     double d_viewAngle;
00078     double d_totalAngle;
00079     int d_tickCnt;
00080     int d_intBorder;
00081     int d_borderWidth;
00082     int d_colorCnt;
00083     int d_wheelWidth;
00084     int d_allocContext;
00085 };
00086 
00087 #endif

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