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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 *, const QColorGroup &,
    00055         const QPoint &center, int radius, double origin, double width,
    00056         int numThorns, int numThornLevels, double shrinkFactor);
    00057
    00058 private:
    00059     double d_width;
    00060     int d_numThorns;
    00061     int d_numThornLevels;
    00062     double d_shrinkFactor;
    00063 };
    00064
    00065 #endif // QWT_COMPASS_ROSE_H