<?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>Qt 4.6: gradients.h Example File (demos/gradients/gradients.h)</title> <link href="classic.css" rel="stylesheet" type="text/css" /> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td align="left" valign="top" width="32"><a href="http://qt.nokia.com/"><img src="images/qt-logo.png" align="left" border="0" /></a></td> <td width="1"> </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="functions.html"><font color="#004faf">All Functions</font></a> · <a href="overviews.html"><font color="#004faf">Overviews</font></a></td></tr></table><h1 class="title">gradients.h Example File<br /><span class="small-subtitle">demos/gradients/gradients.h</span> </h1> <pre><span class="comment"> /**************************************************************************** ** ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the demonstration applications of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** Commercial Usage ** Licensees holding valid Qt Commercial licenses may use this file in ** accordance with the Qt Commercial License Agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and Nokia. ** ** 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 1.1, 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. ** ** If you have questions regarding the use of this file, please contact ** Nokia at qt-info@nokia.com. ** $QT_END_LICENSE$ ** ****************************************************************************/</span> #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 <span class="comment">// GRADIENTS_H</span></pre> <p /><address><hr /><div align="center"> <table width="100%" cellspacing="0" border="0"><tr class="address"> <td width="40%" align="left">Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)</td> <td width="20%" align="center"><a href="trademarks.html">Trademarks</a></td> <td width="40%" align="right"><div align="right">Qt 4.6.3</div></td> </tr></table></div></address></body> </html>