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qwt_plot_layout.h

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 setCanvasMargin(int margin, int axis = -1);
00044     int canvasMargin(int axis) const;
00045 
00046     void setAlignCanvasToScales(bool);
00047     bool alignCanvasToScales() const;
00048 
00049     void setSpacing(int);
00050     int spacing() const;
00051 
00052     void setLegendPosition(QwtPlot::Position pos, double ratio);
00053     void setLegendPosition(QwtPlot::Position pos);
00054     QwtPlot::Position legendPosition() const;
00055 
00056     void setLegendRatio(double ratio);
00057     double legendRatio() const;
00058 
00059 #ifndef QWT_NO_COMPAT    
00060     // The following two functions are deprecated
00061     void setLegendPos(int pos, double ratio = 0.0);
00062     int legendPos() const;
00063 #endif
00064 
00065     virtual QSize minimumSizeHint(const QwtPlot *) const;    
00066 
00067     virtual void activate(const QwtPlot *, 
00068         const QRect &rect, int options = 0);
00069 
00070     virtual void invalidate();
00071 
00072     const QRect &titleRect() const;
00073     const QRect &legendRect() const;
00074     const QRect &scaleRect(int axis) const;
00075     const QRect &canvasRect() const;
00076 
00077 protected:
00078 
00079     QRect layoutLegend(int options, const QRect &) const;
00080     QRect alignLegend(const QRect &canvasRect, 
00081         const QRect &legendRect) const;
00082 
00083     void expandLineBreaks(int options, const QRect &rect, 
00084         int &dimTitle, int dimAxes[QwtPlot::axisCnt]) const;
00085 
00086     void alignScales(int options, QRect &canvasRect,
00087         QRect scaleRect[QwtPlot::axisCnt]) const;
00088 
00089     QRect d_titleRect;
00090     QRect d_legendRect;
00091     QRect d_scaleRect[QwtPlot::axisCnt];
00092     QRect d_canvasRect;
00093 
00094     QwtPlotLayoutData *d_layoutData;
00095 
00096 private:
00097     QwtPlot::Position d_legendPos;
00098     double d_legendRatio;
00099     unsigned int d_margin;
00100     unsigned int d_spacing;
00101     unsigned int d_canvasMargin[QwtPlot::axisCnt];
00102     bool d_alignCanvasToScales;
00103 };
00104 
00105 #endif

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