qwt_plot_canvas.h

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/******************************************************************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   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_PLOT_CANVAS_H
#define QWT_PLOT_CANVAS_H

#include "qwt_global.h"
#include "qwt_plot_abstract_canvas.h"

#include <qframe.h>

class QwtPlot;
class QPixmap;
class QPainterPath;

class QWT_EXPORT QwtPlotCanvas : public QFrame, public QwtPlotAbstractCanvas
{
    Q_OBJECT

    Q_PROPERTY( double borderRadius READ borderRadius WRITE setBorderRadius )

  public:

    enum PaintAttribute
    {
        BackingStore = 1,

        Opaque       = 2,

        HackStyledBackground = 4,

        ImmediatePaint = 8
    };

    Q_DECLARE_FLAGS( PaintAttributes, PaintAttribute )

    explicit QwtPlotCanvas( QwtPlot* = NULL );
    virtual ~QwtPlotCanvas();

    void setPaintAttribute( PaintAttribute, bool on = true );
    bool testPaintAttribute( PaintAttribute ) const;

    const QPixmap* backingStore() const;
    Q_INVOKABLE void invalidateBackingStore();

    virtual bool event( QEvent* ) QWT_OVERRIDE;

    Q_INVOKABLE QPainterPath borderPath( const QRect& ) const;

  public Q_SLOTS:
    void replot();

  protected:
    virtual void paintEvent( QPaintEvent* ) QWT_OVERRIDE;
    virtual void resizeEvent( QResizeEvent* ) QWT_OVERRIDE;

    virtual void drawBorder( QPainter* ) QWT_OVERRIDE;

  private:
    class PrivateData;
    PrivateData* m_data;
};

Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotCanvas::PaintAttributes )

#endif