<?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 4.3: 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://www.trolltech.com/products/qt"><img src="images/qt-logo.png" align="left" width="32" height="32" 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="mainclasses.html"><font color="#004faf">Main Classes</font></a> · <a href="groups.html"><font color="#004faf">Grouped Classes</font></a> · <a href="modules.html"><font color="#004faf">Modules</font></a> · <a href="functions.html"><font color="#004faf">Functions</font></a></td> <td align="right" valign="top" width="230"><a href="http://www.trolltech.com"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></a></td></tr></table><h1 align="center">gradients.h Example File<br /><sup><sup>demos/gradients/gradients.h</sup></sup></h1> <pre><span class="comment"> /**************************************************************************** ** ** Copyright (C) 2005-2008 Trolltech ASA. All rights reserved. ** ** This file is part of the demonstration applications of the Qt Toolkit. ** ** This file may be used under the terms of the GNU General Public ** License versions 2.0 or 3.0 as published by the Free Software ** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3 ** included in the packaging of this file. Alternatively you may (at ** your option) use any later version of the GNU General Public ** License if such license has been publicly approved by Trolltech ASA ** (or its successors, if any) and the KDE Free Qt Foundation. In ** addition, as a special exception, Trolltech gives you certain ** additional rights. These rights are described in the Trolltech GPL ** Exception version 1.1, which can be found at ** http://www.trolltech.com/products/qt/gplexception/ and in the file ** GPL_EXCEPTION.txt in this package. ** ** Please review the following information to ensure GNU General ** Public Licensing requirements will be met: ** http://trolltech.com/products/qt/licenses/licensing/opensource/. If ** you are unsure which license is appropriate for your use, please ** review the following information: ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview ** or contact the sales department at sales@trolltech.com. ** ** In addition, as a special exception, Trolltech, as the sole ** copyright holder for Qt Designer, grants users of the Qt/Eclipse ** Integration plug-in the right for the Qt/Eclipse Integration to ** link to functionality provided by Qt Designer and its related ** libraries. ** ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND, ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly ** granted herein. ** ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ** ****************************************************************************/</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">//</span> GRADIENTS_H</pre> <p /><address><hr /><div align="center"> <table width="100%" cellspacing="0" border="0"><tr class="address"> <td width="30%">Copyright © 2008 <a href="trolltech.html">Trolltech</a></td> <td width="40%" align="center"><a href="trademarks.html">Trademarks</a></td> <td width="30%" align="right"><div align="right">Qt 4.3.4</div></td> </tr></table></div></address></body> </html>