qt5base-lts/examples/widgets/painting/gradients/gradients.h
Gabriel de Dietrich 806dda08d6 Moving .qdoc files under examples/widgets/doc
Updated those .qdoc files to refer to the new relative examples
emplacement. Images and snippets to be moved later.

Also grouped all widgets related examples under widgets.

Change-Id: Ib29696e2d8948524537f53e8dda88f9ee26a597f
Reviewed-by: J-P Nurmi <j-p.nurmi@nokia.com>
2012-08-20 12:20:55 +02:00

171 lines
4.4 KiB
C++

/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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 1.1, 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef GRADIENTS_H
#define GRADIENTS_H
#include "arthurwidgets.h"
#include <QtWidgets>
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