gradients.h Example File

painting/gradients/gradients.h
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#ifndef GRADIENTS_H #define GRADIENTS_H #include "arthurwidgets.h" class QRadioButton; class HoverPoints; class ShadeWidget : public QWidget { Q_OBJECT public: enum ShadeType { RedShade, GreenShade, BlueShade, ARGBShade }; ShadeWidget(ShadeType type, QWidget *parent); void setGradientStops(const QGradientStops &stops); void paintEvent(QPaintEvent *e) override; QSize sizeHint() const override { return QSize(150, 40); } QPolygonF points() const; HoverPoints *hoverPoints() const { return m_hoverPoints; } uint colorAt(int x); signals: void colorsChanged(); private: void generateShade(); ShadeType m_shade_type; QImage m_shade; HoverPoints *m_hoverPoints; QLinearGradient m_alpha_gradient; }; class GradientEditor : public QWidget { Q_OBJECT public: GradientEditor(QWidget *parent); void setGradientStops(const QGradientStops &stops); public slots: void pointsUpdated(); signals: void gradientStopsChanged(const QGradientStops &stops); private: ShadeWidget *m_red_shade; ShadeWidget *m_green_shade; ShadeWidget *m_blue_shade; ShadeWidget *m_alpha_shade; }; class GradientRenderer : public ArthurFrame { Q_OBJECT public: GradientRenderer(QWidget *parent); void paint(QPainter *p) override; QSize sizeHint() const override { return QSize(400, 400); } HoverPoints *hoverPoints() const { return m_hoverPoints; } void mousePressEvent(QMouseEvent *e) override; public slots: void setGradientStops(const QGradientStops &stops); void setPadSpread() { m_spread = QGradient::PadSpread; update(); } void setRepeatSpread() { m_spread = QGradient::RepeatSpread; update(); } void setReflectSpread() { m_spread = QGradient::ReflectSpread; update(); } void setLinearGradient() { m_gradientType = Qt::LinearGradientPattern; update(); } void setRadialGradient() { m_gradientType = Qt::RadialGradientPattern; update(); } void setConicalGradient() { m_gradientType = Qt::ConicalGradientPattern; update(); } private: QGradientStops m_stops; HoverPoints *m_hoverPoints; QGradient::Spread m_spread; Qt::BrushStyle m_gradientType; }; class GradientWidget : public QWidget { Q_OBJECT public: GradientWidget(QWidget *parent); public slots: void setDefault1() { setDefault(1); } void setDefault2() { setDefault(2); } void setDefault3() { setDefault(3); } void setDefault4() { setDefault(4); } void setPreset() { changePresetBy(0); } void setPrevPreset() { changePresetBy(-1); } void setNextPreset() { changePresetBy(1); } private: void setDefault(int i); void updatePresetName(); void changePresetBy(int indexOffset); GradientRenderer *m_renderer; GradientEditor *m_editor; QRadioButton *m_linearButton; QRadioButton *m_radialButton; QRadioButton *m_conicalButton; QRadioButton *m_padSpreadButton; QRadioButton *m_reflectSpreadButton; QRadioButton *m_repeatSpreadButton; QPushButton *m_presetButton; int m_presetIndex = 0; }; #endif // GRADIENTS_H

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