qwt_null_paintdevice.h

/******************************************************************************
 * 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_NULL_PAINT_DEVICE_H
#define QWT_NULL_PAINT_DEVICE_H
 
#include "qwt_global.h"
 
#include <qpaintdevice.h>
#include <qpaintengine.h>
 
class QWT_EXPORT QwtNullPaintDevice : public QPaintDevice
{
  public:
    enum Mode
    {
        NormalMode,
 
        PolygonPathMode,
 
        PathMode
    };
 
    QwtNullPaintDevice();
    virtual ~QwtNullPaintDevice();
 
    void setMode( Mode );
    Mode mode() const;
 
    virtual QPaintEngine* paintEngine() const QWT_OVERRIDE;
 
    virtual int metric( PaintDeviceMetric ) const QWT_OVERRIDE;
 
    virtual void drawRects(const QRect*, int );
    virtual void drawRects(const QRectF*, int );
 
    virtual void drawLines(const QLine*, int );
    virtual void drawLines(const QLineF*, int );
 
    virtual void drawEllipse(const QRectF&);
    virtual void drawEllipse(const QRect&);
 
    virtual void drawPath(const QPainterPath&);
 
    virtual void drawPoints(const QPointF*, int );
    virtual void drawPoints(const QPoint*, int );
 
    virtual void drawPolygon( const QPointF*, int,
        QPaintEngine::PolygonDrawMode );
 
    virtual void drawPolygon( const QPoint*, int,
        QPaintEngine::PolygonDrawMode );
 
    virtual void drawPixmap(const QRectF&,
        const QPixmap&, const QRectF&);
 
    virtual void drawTextItem(const QPointF&, const QTextItem&);
 
    virtual void drawTiledPixmap(const QRectF&,
        const QPixmap&, const QPointF& );
 
    virtual void drawImage(const QRectF&, const QImage&,
        const QRectF&, Qt::ImageConversionFlags );
 
    virtual void updateState( const QPaintEngineState& );
 
  protected:
    virtual QSize sizeMetrics() const = 0;
 
  private:
    class PaintEngine;
    PaintEngine* m_engine;
 
    class PrivateData;
    PrivateData* m_data;
};
 
#endif