Qwt User's Guide: qwt_compass_rose.h Source File

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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 
00021 class QWT_EXPORT QwtCompassRose
00022 {
00023 public:
00024     virtual ~QwtCompassRose() {};
00025 
00027     virtual void setPalette(const QPalette &p) { d_palette = p; }
00028 
00030     const QPalette &palette() const { return d_palette; }
00031 
00041     virtual void draw(QPainter *painter, const QPoint &center, 
00042         int radius, double north, 
00043         QPalette::ColorGroup colorGroup = QPalette::Active) const = 0;
00044 
00045 private:
00046     QPalette d_palette;
00047 };
00048 
00052 class QWT_EXPORT QwtSimpleCompassRose: public QwtCompassRose
00053 {
00054 public:
00055     QwtSimpleCompassRose(int numThorns = 8, int numThornLevels = -1);
00056 
00057     void setWidth(double w);
00058 
00060     double width() const { return d_width; }
00061 
00062     void setNumThorns(int count);
00063     int numThorns() const;
00064 
00065     void setNumThornLevels(int count);
00066     int numThornLevels() const;
00067 
00068     void setShrinkFactor(double factor) { d_shrinkFactor = factor; }
00069     double shrinkFactor() const { return d_shrinkFactor; }
00070 
00071     virtual void draw(QPainter *, const QPoint &center, int radius, 
00072         double north, QPalette::ColorGroup = QPalette::Active) const;
00073 
00074     static void drawRose(QPainter *, 
00075 #if QT_VERSION < 0x040000
00076         const QColorGroup &,
00077 #else
00078         const QPalette &,
00079 #endif
00080         const QPoint &center, int radius, double origin, double width, 
00081         int numThorns, int numThornLevels, double shrinkFactor);
00082 
00083 private:
00084     double d_width;     
00085     int d_numThorns;        
00086     int d_numThornLevels; 
00087     double d_shrinkFactor;
00088 };
00089 
00090 #endif // QWT_COMPASS_ROSE_H
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