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40 
41 #ifndef RENDERTHREAD_H
42 #define RENDERTHREAD_H
43 
44 #include <QMutex>
45 #include <QSize>
46 #include <QThread>
47 #include <QWaitCondition>
48 
49 QT_BEGIN_NAMESPACE
50 class QImage;
51 QT_END_NAMESPACE
52 
53 //! [0]
54 class RenderThread : public QThread
55 {
56     Q_OBJECT
57 
58 public:
59     RenderThread(QObject *parent = 0);
60     ~RenderThread();
61 
62     void render(double centerX, double centerY, double scaleFactor,
63                 QSize resultSize);
64 
65 signals:
66     void renderedImage(const QImage &image, double scaleFactor);
67 
68 protected:
69     void run();
70 
71 private:
72     uint rgbFromWaveLength(double wave);
73 
74     QMutex mutex;
75     QWaitCondition condition;
76     double centerX;
77     double centerY;
78     double scaleFactor;
79     QSize resultSize;
80     bool restart;
81     bool abort;
82 
83     enum { ColormapSize = 512 };
84     uint colormap[ColormapSize];
85 };
86 //! [0]
87 
88 #endif
89