qwt_graphic.h

/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * 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_GRAPHIC_H
#define QWT_GRAPHIC_H
 
#include "qwt_global.h"
#include "qwt_null_paintdevice.h"
#include <qmetatype.h>
#include <qimage.h>
#include <qpixmap.h>
 
class QwtPainterCommand;
 
class QWT_EXPORT QwtGraphic: public QwtNullPaintDevice
{
public:
    enum RenderHint
    {
        RenderPensUnscaled = 0x1
    };
 
    typedef QFlags<RenderHint> RenderHints;
 
    QwtGraphic();
    QwtGraphic( const QwtGraphic & );
 
    virtual ~QwtGraphic();
 
    QwtGraphic& operator=( const QwtGraphic & );
 
    void reset();
 
    bool isNull() const;
    bool isEmpty() const;
 
    void render( QPainter * ) const;
 
    void render( QPainter *, const QSizeF &,
            Qt::AspectRatioMode = Qt::IgnoreAspectRatio  ) const;
 
    void render( QPainter *, const QRectF &,
            Qt::AspectRatioMode = Qt::IgnoreAspectRatio  ) const;
 
    void render( QPainter *, const QPointF &,
        Qt::Alignment = Qt::AlignTop | Qt::AlignLeft ) const;
 
    QPixmap toPixmap() const;
    QPixmap toPixmap( const QSize &,
        Qt::AspectRatioMode = Qt::IgnoreAspectRatio  ) const;
 
    QImage toImage() const;
    QImage toImage( const QSize &,
        Qt::AspectRatioMode = Qt::IgnoreAspectRatio  ) const;
 
    QRectF scaledBoundingRect( double sx, double sy ) const;
 
    QRectF boundingRect() const;
    QRectF controlPointRect() const;
 
    const QVector< QwtPainterCommand > &commands() const;
    void setCommands( QVector< QwtPainterCommand > & );
 
    void setDefaultSize( const QSizeF & );
    QSizeF defaultSize() const;
 
    void setRenderHint( RenderHint, bool on = true );
    bool testRenderHint( RenderHint ) const;
 
protected:
    virtual QSize sizeMetrics() const;
 
    virtual void drawPath( const QPainterPath & );
 
    virtual void drawPixmap( const QRectF &,
        const QPixmap &, const QRectF & );
 
    virtual void drawImage( const QRectF &,
        const QImage &, const QRectF &, Qt::ImageConversionFlags );
 
    virtual void updateState( const QPaintEngineState &state );
 
private:
    void updateBoundingRect( const QRectF & );
    void updateControlPointRect( const QRectF & );
 
    class PathInfo;
 
    class PrivateData;
    PrivateData *d_data;
};
 
Q_DECLARE_OPERATORS_FOR_FLAGS( QwtGraphic::RenderHints )
Q_DECLARE_METATYPE( QwtGraphic )
 
#endif