Qwt User's Guide: qwt_plot_layout.h Source File

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 "qwt_global.h"
00014 #include "qwt_plot.h"
00015 
00022 class QWT_EXPORT QwtPlotLayout
00023 {
00024 public:
00025     enum Options
00026     {
00027         AlignScales = 1,
00028         IgnoreScrollbars = 2,
00029         IgnoreFrames = 4,
00030         IgnoreMargin = 8,
00031         IgnoreLegend = 16
00032     };
00033 
00034     explicit QwtPlotLayout();
00035     virtual ~QwtPlotLayout();
00036 
00037     void setMargin(int);
00038     int margin() const;
00039 
00040     void setCanvasMargin(int margin, int axis = -1);
00041     int canvasMargin(int axis) const;
00042 
00043     void setAlignCanvasToScales(bool);
00044     bool alignCanvasToScales() const;
00045 
00046     void setSpacing(int);
00047     int spacing() const;
00048 
00049     void setLegendPosition(QwtPlot::LegendPosition pos, double ratio);
00050     void setLegendPosition(QwtPlot::LegendPosition pos);
00051     QwtPlot::LegendPosition legendPosition() const;
00052 
00053     void setLegendRatio(double ratio);
00054     double legendRatio() const;
00055 
00056     virtual QSize minimumSizeHint(const QwtPlot *) const;    
00057 
00058     virtual void activate(const QwtPlot *, 
00059         const QRect &rect, int options = 0);
00060 
00061     virtual void invalidate();
00062 
00063     const QRect &titleRect() const;
00064     const QRect &legendRect() const;
00065     const QRect &scaleRect(int axis) const;
00066     const QRect &canvasRect() const;
00067 
00068     class LayoutData;
00069 
00070 protected:
00071 
00072     QRect layoutLegend(int options, const QRect &) const;
00073     QRect alignLegend(const QRect &canvasRect, 
00074         const QRect &legendRect) const;
00075 
00076     void expandLineBreaks(int options, const QRect &rect, 
00077         int &dimTitle, int dimAxes[QwtPlot::axisCnt]) const;
00078 
00079     void alignScales(int options, QRect &canvasRect,
00080         QRect scaleRect[QwtPlot::axisCnt]) const;
00081 
00082 private:
00083     class PrivateData;
00084 
00085     PrivateData *d_data;
00086 };
00087 
00088 #endif