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<td align="right" valign="top" width="230"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></td></tr></table><h1 align="center">gradients.h Example File<br /><small><small>demos/gradients/gradients.h</small></small></h1>

<pre>  #ifndef GRADIENTS_H

#define GRADIENTS_H

#include <QtGui>

#include "arthurwidgets.h"

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);

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void setPadSpread() { m_spread = QGradient::PadSpread; update(); }

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void setRepeatSpread() { m_spread = QGradient::RepeatSpread; update(); }

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void setReflectSpread() { m_spread = QGradient::ReflectSpread; update(); }

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void setLinearGradient() { m_gradientType = Qt::LinearGradientPattern; update(); }

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void setRadialGradient() { m_gradientType = Qt::RadialGradientPattern; update(); }

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void setConicalGradient() { m_gradientType = Qt::ConicalGradientPattern; update(); }

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private:

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QGradientStops m_stops;

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HoverPoints *m_hoverPoints;

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QGradient::Spread m_spread;

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Qt::BrushStyle m_gradientType;

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};

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class GradientWidget : public QWidget

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{

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Q_OBJECT

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public:

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GradientWidget(QWidget *parent);

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public slots:

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void setDefault1() { setDefault(1); }

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void setDefault2() { setDefault(2); }

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void setDefault3() { setDefault(3); }

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void setDefault4() { setDefault(4); }

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private:

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void setDefault(int i);

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GradientRenderer *m_renderer;

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GradientEditor *m_editor;

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QRadioButton *m_linearButton;

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QRadioButton *m_radialButton;

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QRadioButton *m_conicalButton;

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QRadioButton *m_padSpreadButton;

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QRadioButton *m_reflectSpreadButton;

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QRadioButton *m_repeatSpreadButton;

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};

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#endif // GRADIENTS_H</pre>

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