qwt_polar_canvas.h

/******************************************************************************
 * QwtPolar Widget Library
 * Copyright (C) 2008   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/
 
#ifndef QWT_POLAR_CANVAS_H
#define QWT_POLAR_CANVAS_H
 
#include "qwt_global.h"
#include "qwt_point_polar.h"
#include <qframe.h>
class QPainter;
class QwtPolarPlot;
 
class QWT_EXPORT QwtPolarCanvas : public QFrame
{
    Q_OBJECT
 
  public:
    enum PaintAttribute
    {
        BackingStore = 0x01
    };
 
    Q_DECLARE_FLAGS( PaintAttributes, PaintAttribute )
 
    
    explicit QwtPolarCanvas( QwtPolarPlot* );
    virtual ~QwtPolarCanvas();
 
    QwtPolarPlot* plot();
    const QwtPolarPlot* plot() const;
 
    void setPaintAttribute( PaintAttribute, bool on = true );
    bool testPaintAttribute( PaintAttribute ) const;
 
    const QPixmap* backingStore() const;
    void invalidateBackingStore();
 
    QwtPointPolar invTransform( const QPoint& ) const;
    QPoint transform( const QwtPointPolar& ) const;
 
  protected:
    virtual void paintEvent( QPaintEvent* ) override;
    virtual void resizeEvent( QResizeEvent* ) override;
 
  private:
    class PrivateData;
    PrivateData* m_data;
};
 
Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPolarCanvas::PaintAttributes )
 
#endif