/****************************************************************************+
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**+
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the demonstration applications of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#ifndef GRADIENTS_H+
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#define GRADIENTS_H+
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+
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#include "arthurwidgets.h"+
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+
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#include <QtGui>+
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+
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class HoverPoints;+
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+
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+
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class ShadeWidget : public QWidget+
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{+
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    Q_OBJECT+
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public:+
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    enum ShadeType {+
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        RedShade,+
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        GreenShade,+
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        BlueShade,+
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        ARGBShade+
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    };+
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+
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    ShadeWidget(ShadeType type, QWidget *parent);+
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+
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    void setGradientStops(const QGradientStops &stops);+
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+
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    void paintEvent(QPaintEvent *e);+
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+
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    QSize sizeHint() const { return QSize(150, 40); }+
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    QPolygonF points() const;+
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+
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    HoverPoints *hoverPoints() const { return m_hoverPoints; }+
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+
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    uint colorAt(int x);+
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+
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signals:+
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    void colorsChanged();+
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+
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private:+
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    void generateShade();+
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+
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    ShadeType m_shade_type;+
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    QImage m_shade;+
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    HoverPoints *m_hoverPoints;+
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    QLinearGradient m_alpha_gradient;+
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};+
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+
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class GradientEditor : public QWidget+
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{+
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    Q_OBJECT+
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public:+
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    GradientEditor(QWidget *parent);+
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+
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    void setGradientStops(const QGradientStops &stops);+
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+
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public slots:+
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    void pointsUpdated();+
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+
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signals:+
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    void gradientStopsChanged(const QGradientStops &stops);+
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+
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private:+
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    ShadeWidget *m_red_shade;+
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    ShadeWidget *m_green_shade;+
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    ShadeWidget *m_blue_shade;+
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    ShadeWidget *m_alpha_shade;+
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};+
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+
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+
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class GradientRenderer : public ArthurFrame+
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{+
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    Q_OBJECT+
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public:+
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    GradientRenderer(QWidget *parent);+
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    void paint(QPainter *p);+
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+
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    QSize sizeHint() const { return QSize(400, 400); }+
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+
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    HoverPoints *hoverPoints() const { return m_hoverPoints; }+
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    void mousePressEvent(QMouseEvent *e);+
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+
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public slots:+
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    void setGradientStops(const QGradientStops &stops);+
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+
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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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+
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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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+
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+
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private:+
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    QGradientStops m_stops;+
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    HoverPoints *m_hoverPoints;+
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+
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    QGradient::Spread m_spread;+
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    Qt::BrushStyle m_gradientType;+
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};+
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+
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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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+
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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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+
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private:+
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    void setDefault(int i);+
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+
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    GradientRenderer *m_renderer;+
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    GradientEditor *m_editor;+
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+
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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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};+
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+
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#endif // GRADIENTS_H+
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