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#ifndef GRADIENTS_H

#define GRADIENTS_H

#include "arthurwidgets.h"

#include <QtGui>

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);

    QSize sizeHint() const { 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);

    QSize sizeHint() const { return QSize(400, 400); }

    HoverPoints *hoverPoints() const { return m_hoverPoints; }

    void mousePressEvent(QMouseEvent *e);

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); }

private:

    void setDefault(int i);

    GradientRenderer *m_renderer;

    GradientEditor *m_editor;

    QRadioButton *m_linearButton;

    QRadioButton *m_radialButton;

    QRadioButton *m_conicalButton;

    QRadioButton *m_padSpreadButton;

    QRadioButton *m_reflectSpreadButton;

    QRadioButton *m_repeatSpreadButton;

};

#endif // GRADIENTS_H