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*);
    ~QwtPolarCanvas() override;
 
    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:
    QWT_DECLARE_PRIVATE(QwtPolarCanvas)
};
 
Q_DECLARE_OPERATORS_FOR_FLAGS(QwtPolarCanvas::PaintAttributes)
 
#endif