qt_demoe/third/3rd_qwt/qwt_plot_layout.h

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/* -*- 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_PLOT_LAYOUT_H
#define QWT_PLOT_LAYOUT_H
#include "qwt_global.h"
#include "qwt_plot.h"
/*!
\brief Layout engine for QwtPlot.
It is used by the QwtPlot widget to organize its internal widgets
or by QwtPlot::print() to render its content to a QPaintDevice like
a QPrinter, QPixmap/QImage or QSvgRenderer.
\sa QwtPlot::setPlotLayout()
*/
class QWT_EXPORT QwtPlotLayout
{
public:
/*!
Options to configure the plot layout engine
\sa activate(), QwtPlotRenderer
*/
enum Option
{
//! Unused
AlignScales = 0x01,
/*!
Ignore the dimension of the scrollbars. There are no
scrollbars, when the plot is not rendered to widgets.
*/
IgnoreScrollbars = 0x02,
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//! Ignore all frames.
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IgnoreFrames = 0x04,
//! Ignore the legend.
IgnoreLegend = 0x08,
//! Ignore the title.
IgnoreTitle = 0x10,
//! Ignore the footer.
IgnoreFooter = 0x20
};
//! Layout options
typedef QFlags<Option> Options;
explicit QwtPlotLayout();
virtual ~QwtPlotLayout();
void setCanvasMargin( int margin, int axis = -1 );
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int canvasMargin( int axisId ) const;
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void setAlignCanvasToScales( bool );
void setAlignCanvasToScale( int axisId, bool );
bool alignCanvasToScale( int axisId ) const;
void setSpacing( int );
int spacing() const;
void setLegendPosition( QwtPlot::LegendPosition pos, double ratio );
void setLegendPosition( QwtPlot::LegendPosition pos );
QwtPlot::LegendPosition legendPosition() const;
void setLegendRatio( double ratio );
double legendRatio() const;
virtual QSize minimumSizeHint( const QwtPlot * ) const;
virtual void activate( const QwtPlot *,
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const QRectF &plotRect, Options options = 0x00 );
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virtual void invalidate();
QRectF titleRect() const;
QRectF footerRect() const;
QRectF legendRect() const;
QRectF scaleRect( int axis ) const;
QRectF canvasRect() const;
class LayoutData;
protected:
void setTitleRect( const QRectF & );
void setFooterRect( const QRectF & );
void setLegendRect( const QRectF & );
void setScaleRect( int axis, const QRectF & );
void setCanvasRect( const QRectF & );
QRectF layoutLegend( Options options, const QRectF & ) const;
QRectF alignLegend( const QRectF &canvasRect,
const QRectF &legendRect ) const;
void expandLineBreaks( Options options, const QRectF &rect,
int &dimTitle, int &dimFooter, int dimAxes[QwtPlot::axisCnt] ) const;
void alignScales( Options options, QRectF &canvasRect,
QRectF scaleRect[QwtPlot::axisCnt] ) const;
private:
class PrivateData;
PrivateData *d_data;
};
Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotLayout::Options )
#endif