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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the demonstration applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#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