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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef GRADIENTS_H
#define GRADIENTS_H
#include "arthurwidgets.h"
QT_BEGIN_NAMESPACE
class QRadioButton;
QT_END_NAMESPACE
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) Q_DECL_OVERRIDE;
QSize sizeHint() const Q_DECL_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) Q_DECL_OVERRIDE;
QSize sizeHint() const Q_DECL_OVERRIDE { return QSize(400, 400); }
HoverPoints *hoverPoints() const { return m_hoverPoints; }
void mousePressEvent(QMouseEvent *e) Q_DECL_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); }
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
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