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qwt_plot_layout.h

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00001 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
00002  * Qwt Widget Library
00003  * Copyright (C) 1997   Josef Wilgen
00004  * Copyright (C) 2002   Uwe Rathmann
00005  * 
00006  * This library is free software; you can redistribute it and/or
00007  * modify it under the terms of the Qwt License, Version 1.0
00008  *****************************************************************************/
00009 
00010 #ifndef QWT_PLOT_LAYOUT_H
00011 #define QWT_PLOT_LAYOUT_H
00012 
00013 #include <qlayout.h>
00014 #include "qwt_global.h"
00015 #include "qwt_plot.h"
00016 
00017 class QwtPlotLayoutData;
00018 
00025 class QWT_EXPORT QwtPlotLayout
00026 {
00027 public:
00028     enum Options
00029     {
00030         AlignScales = 1,
00031         IgnoreScrollbars = 2,
00032         IgnoreFrames = 4,
00033         IgnoreMargin = 8,
00034         IgnoreLegend = 16
00035     };
00036 
00037     QwtPlotLayout();
00038     virtual ~QwtPlotLayout();
00039 
00040     void setMargin(int);
00041     int margin() const;
00042 
00043     void setSpacing(int);
00044     int spacing() const;
00045 
00046     void setLegendPos(int pos, double ratio = 0.0);
00047     int legendPos() const;
00048     double legendRatio() const;
00049 
00050     virtual QSize minimumSizeHint(const QwtPlot *) const;    
00051 
00052     virtual void activate(const QwtPlot *, 
00053         const QRect &rect, int options = 0);
00054 
00055     virtual void invalidate();
00056 
00057     const QRect &titleRect() const;
00058     const QRect &legendRect() const;
00059     const QRect &scaleRect(int axis) const;
00060     const QRect &canvasRect() const;
00061 
00062 protected:
00063 
00064     QRect layoutLegend(int options, const QRect &) const;
00065     QRect alignLegend(const QRect &canvasRect, 
00066         const QRect &legendRect) const;
00067 
00068     void expandLineBreaks(int options, const QRect &rect, 
00069         int &dimTitle, int dimAxes[QwtPlot::axisCnt]) const;
00070 
00071     void alignScales(int options,
00072         QRect scaleRect[QwtPlot::axisCnt]) const;
00073 
00074     QRect d_titleRect;
00075     QRect d_legendRect;
00076     QRect d_scaleRect[QwtPlot::axisCnt];
00077     QRect d_canvasRect;
00078 
00079     QwtPlotLayoutData *d_layoutData;
00080 
00081 private:
00082     int d_options;
00083 
00084     int d_legendPos;
00085     double d_legendRatio;
00086     unsigned int d_margin;
00087     unsigned int d_spacing;
00088     unsigned int d_canvasMargin;
00089 };
00090 
00091 #endif

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