qwt_plot_renderer.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_RENDERER_H
#define QWT_PLOT_RENDERER_H

#include "qwt_global.h"
#include "qwt_axis_id.h"

#include <qobject.h>
#include <qsize.h>

class QwtPlot;
class QwtScaleMap;
class QRectF;
class QPainter;
class QPaintDevice;

#ifndef QT_NO_PRINTER
class QPrinter;
#endif

#ifndef QWT_NO_SVG
#ifdef QT_SVG_LIB
class QSvgGenerator;
#endif
#endif

class QWT_EXPORT QwtPlotRenderer : public QObject
{
    Q_OBJECT

  public:
    enum DiscardFlag
    {
        DiscardNone             = 0x00,

        DiscardBackground       = 0x01,

        DiscardTitle            = 0x02,

        DiscardLegend           = 0x04,

        DiscardCanvasBackground = 0x08,

        DiscardFooter           = 0x10,

        DiscardCanvasFrame           = 0x20

    };

    Q_DECLARE_FLAGS( DiscardFlags, DiscardFlag )

    
    enum LayoutFlag
    {
        DefaultLayout   = 0x00,

        FrameWithScales = 0x01
    };

    Q_DECLARE_FLAGS( LayoutFlags, LayoutFlag )

    explicit QwtPlotRenderer( QObject* = NULL );
    virtual ~QwtPlotRenderer();

    void setDiscardFlag( DiscardFlag flag, bool on = true );
    bool testDiscardFlag( DiscardFlag flag ) const;

    void setDiscardFlags( DiscardFlags flags );
    DiscardFlags discardFlags() const;

    void setLayoutFlag( LayoutFlag flag, bool on = true );
    bool testLayoutFlag( LayoutFlag flag ) const;

    void setLayoutFlags( LayoutFlags flags );
    LayoutFlags layoutFlags() const;

    void renderDocument( QwtPlot*, const QString& fileName,
        const QSizeF& sizeMM, int resolution = 85 );

    void renderDocument( QwtPlot*,
        const QString& fileName, const QString& format,
        const QSizeF& sizeMM, int resolution = 85 );

#ifndef QWT_NO_SVG
#ifdef QT_SVG_LIB
    void renderTo( QwtPlot*, QSvgGenerator& ) const;
#endif
#endif

#ifndef QT_NO_PRINTER
    void renderTo( QwtPlot*, QPrinter& ) const;
#endif

    void renderTo( QwtPlot*, QPaintDevice& ) const;

    virtual void render( QwtPlot*,
        QPainter*, const QRectF& plotRect ) const;

    virtual void renderTitle( const QwtPlot*,
        QPainter*, const QRectF& titleRect ) const;

    virtual void renderFooter( const QwtPlot*,
        QPainter*, const QRectF& footerRect ) const;

    virtual void renderScale( const QwtPlot*, QPainter*,
        QwtAxisId, int startDist, int endDist,
        int baseDist, const QRectF& scaleRect ) const;

    virtual void renderCanvas( const QwtPlot*,
        QPainter*, const QRectF& canvasRect,
        const QwtScaleMap* maps ) const;

    virtual void renderLegend(
        const QwtPlot*, QPainter*, const QRectF& legendRect ) const;

    bool exportTo( QwtPlot*, const QString& documentName,
        const QSizeF& sizeMM = QSizeF( 300, 200 ), int resolution = 85 );

  private:
    void buildCanvasMaps( const QwtPlot*,
        const QRectF&, QwtScaleMap maps[] ) const;

    bool updateCanvasMargins( QwtPlot*,
        const QRectF&, const QwtScaleMap maps[] ) const;

  private:
    class PrivateData;
    PrivateData* m_data;
};

Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotRenderer::DiscardFlags )
Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotRenderer::LayoutFlags )

#endif