Flow Visualization 1.0
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00001 #ifndef GRADIENTS_H 00002 #define GRADIENTS_H 00003 00004 #include <QtGui> 00005 00006 class HoverPoints; 00007 00008 class ShadeWidget : public QWidget 00009 { 00010 Q_OBJECT 00011 public: 00012 enum ShadeType { 00013 RedShade, 00014 GreenShade, 00015 BlueShade, 00016 ARGBShade 00017 }; 00018 00019 ShadeWidget(ShadeType type, QWidget *parent); 00020 00021 void setGradientStops(const QGradientStops &stops); 00022 00023 void paintEvent(QPaintEvent *e); 00024 00025 QSize sizeHint() const { return QSize(150, 40); } 00026 QPolygonF points() const; 00027 00028 void setPoints(QPolygonF points); 00029 00030 void setPixmap(QPixmap pixmap); 00031 00032 HoverPoints *hoverPoints() const { return m_hoverPoints; } 00033 00034 uint colorAt(int x); 00035 00036 signals: 00037 void colorsChanged(); 00038 00039 private: 00040 void generateShade(); 00041 00042 ShadeType m_shade_type; 00043 QImage m_shade; 00044 QImage m_histogram; 00045 HoverPoints *m_hoverPoints; 00046 QLinearGradient m_alpha_gradient; 00047 }; 00048 00049 class GradientEditor : public QWidget 00050 { 00051 Q_OBJECT 00052 public: 00053 GradientEditor(QWidget *parent); 00054 00055 void setGradientStops(const QGradientStops &stops); 00056 00057 QColor getColorAt(int i); 00058 ShadeWidget *m_alpha_shade; 00059 00060 public slots: 00061 void pointsUpdated(); 00062 void saveToFile(QString filename); 00063 void loadFromFile(QString filename); 00064 00065 signals: 00066 void gradientStopsChanged(const QGradientStops &stops); 00067 void transferFunctionChanged(unsigned char *new_texture_data); 00068 00069 private: 00070 ShadeWidget *m_red_shade; 00071 ShadeWidget *m_green_shade; 00072 ShadeWidget *m_blue_shade; 00073 00074 00075 unsigned char * prepareTransferFunctionData(); 00076 }; 00077 00078 #endif // GRADIENTS_H