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qwt_compass_rose.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_COMPASS_ROSE_H
00011 #define QWT_COMPASS_ROSE_H 1
00012 
00013 #include <qpalette.h>
00014 #include "qwt_global.h"
00015 
00016 class QPainter;
00017 
00018 class QWT_EXPORT QwtCompassRose
00019 {
00020 public:
00021     virtual ~QwtCompassRose() {};
00022 
00023     virtual void setPalette(const QPalette &p) { d_palette = p; }
00024     const QPalette &palette() const { return d_palette; }
00025 
00026     virtual void draw(QPainter *, const QPoint &center, 
00027         int radius, double north, 
00028         QPalette::ColorGroup = QPalette::Active) const = 0;
00029 
00030 private:
00031     QPalette d_palette;
00032 };
00033 
00034 class QWT_EXPORT QwtSimpleCompassRose: public QwtCompassRose
00035 {
00036 public:
00037     QwtSimpleCompassRose(int numThorns = 8, int numThornLevels = -1);
00038 
00039     void setWidth(double w);
00040     double width() const { return d_width; }
00041 
00042     void setNumThorns(int count);
00043     int numThorns() const;
00044 
00045     void setNumThornLevels(int count);
00046     int numThornLevels() const;
00047 
00048     void setShrinkFactor(double factor) { d_shrinkFactor = factor; }
00049     double shrinkFactor() const { return d_shrinkFactor; }
00050 
00051     virtual void draw(QPainter *, const QPoint &center, int radius, 
00052         double north, QPalette::ColorGroup = QPalette::Active) const;
00053 
00054     static void drawRose(QPainter *, 
00055 #if QT_VERSION < 0x040000
00056         const QColorGroup &,
00057 #else
00058         const QPalette &,
00059 #endif
00060         const QPoint &center, int radius, double origin, double width, 
00061         int numThorns, int numThornLevels, double shrinkFactor);
00062 
00063 private:
00064     double d_width;     
00065     int d_numThorns;        
00066     int d_numThornLevels; 
00067     double d_shrinkFactor;
00068 };
00069 
00070 #endif // QWT_COMPASS_ROSE_H

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