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Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <h1 class="title">composition.cpp Example File</h1> <span class="small-subtitle">demos/composition/composition.cpp</span> <!-- $$$demos/composition/composition.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** 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. ** ** $QT_BEGIN_LICENSE:LGPL$ ** 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. ** ** 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. ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include "composition.h"</span> <span class="preprocessor">#include <QBoxLayout></span> <span class="preprocessor">#include <QRadioButton></span> <span class="preprocessor">#include <QTimer></span> <span class="preprocessor">#include <QDateTime></span> <span class="preprocessor">#include <QSlider></span> <span class="preprocessor">#include <QMouseEvent></span> <span class="preprocessor">#include <qmath.h></span> <span class="keyword">const</span> <span class="type">int</span> animationInterval <span class="operator">=</span> <span class="number">15</span>; <span class="comment">// update every 16 ms = ~60FPS</span> CompositionWidget<span class="operator">::</span>CompositionWidget(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qwidget.html">QWidget</a></span>(parent) { CompositionRenderer <span class="operator">*</span>view <span class="operator">=</span> <span class="keyword">new</span> CompositionRenderer(<span class="keyword">this</span>); <span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>mainGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(parent); mainGroup<span class="operator">-</span><span class="operator">></span>setTitle(tr(<span class="string">"Composition Modes"</span>)); <span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>modesGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(mainGroup); modesGroup<span class="operator">-</span><span class="operator">></span>setTitle(tr(<span class="string">"Mode"</span>)); rbClear <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Clear"</span>)<span class="operator">,</span> modesGroup); connect(rbClear<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setClearMode())); rbSource <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Source"</span>)<span class="operator">,</span> modesGroup); connect(rbSource<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setSourceMode())); rbDest <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Destination"</span>)<span class="operator">,</span> modesGroup); connect(rbDest<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setDestMode())); rbSourceOver <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Source Over"</span>)<span class="operator">,</span> modesGroup); connect(rbSourceOver<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setSourceOverMode())); rbDestOver <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Destination Over"</span>)<span class="operator">,</span> modesGroup); connect(rbDestOver<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setDestOverMode())); rbSourceIn <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Source In"</span>)<span class="operator">,</span> modesGroup); connect(rbSourceIn<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setSourceInMode())); rbDestIn <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Dest In"</span>)<span class="operator">,</span> modesGroup); connect(rbDestIn<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setDestInMode())); rbSourceOut <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Source Out"</span>)<span class="operator">,</span> modesGroup); connect(rbSourceOut<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setSourceOutMode())); rbDestOut <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Dest Out"</span>)<span class="operator">,</span> modesGroup); connect(rbDestOut<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setDestOutMode())); rbSourceAtop <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Source Atop"</span>)<span class="operator">,</span> modesGroup); connect(rbSourceAtop<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setSourceAtopMode())); rbDestAtop <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Dest Atop"</span>)<span class="operator">,</span> modesGroup); connect(rbDestAtop<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setDestAtopMode())); rbXor <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Xor"</span>)<span class="operator">,</span> modesGroup); connect(rbXor<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setXorMode())); rbPlus <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Plus"</span>)<span class="operator">,</span> modesGroup); connect(rbPlus<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setPlusMode())); rbMultiply <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Multiply"</span>)<span class="operator">,</span> modesGroup); connect(rbMultiply<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setMultiplyMode())); rbScreen <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Screen"</span>)<span class="operator">,</span> modesGroup); connect(rbScreen<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setScreenMode())); rbOverlay <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Overlay"</span>)<span class="operator">,</span> modesGroup); connect(rbOverlay<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setOverlayMode())); rbDarken <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Darken"</span>)<span class="operator">,</span> modesGroup); connect(rbDarken<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setDarkenMode())); rbLighten <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Lighten"</span>)<span class="operator">,</span> modesGroup); connect(rbLighten<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setLightenMode())); rbColorDodge <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Color Dodge"</span>)<span class="operator">,</span> modesGroup); connect(rbColorDodge<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setColorDodgeMode())); rbColorBurn <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Color Burn"</span>)<span class="operator">,</span> modesGroup); connect(rbColorBurn<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setColorBurnMode())); rbHardLight <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Hard Light"</span>)<span class="operator">,</span> modesGroup); connect(rbHardLight<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setHardLightMode())); rbSoftLight <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Soft Light"</span>)<span class="operator">,</span> modesGroup); connect(rbSoftLight<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setSoftLightMode())); rbDifference <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Difference"</span>)<span class="operator">,</span> modesGroup); connect(rbDifference<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setDifferenceMode())); rbExclusion <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Exclusion"</span>)<span class="operator">,</span> modesGroup); connect(rbExclusion<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(setExclusionMode())); <span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>circleColorGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(mainGroup); circleColorGroup<span class="operator">-</span><span class="operator">></span>setTitle(tr(<span class="string">"Circle color"</span>)); <span class="type"><a href="qslider.html">QSlider</a></span> <span class="operator">*</span>circleColorSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> circleColorGroup); circleColorSlider<span class="operator">-</span><span class="operator">></span>setRange(<span class="number">0</span><span class="operator">,</span> <span class="number">359</span>); circleColorSlider<span class="operator">-</span><span class="operator">></span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Preferred<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed); connect(circleColorSlider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> view<span class="operator">,</span> SLOT(setCircleColor(<span class="type">int</span>))); <span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>circleAlphaGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(mainGroup); circleAlphaGroup<span class="operator">-</span><span class="operator">></span>setTitle(tr(<span class="string">"Circle alpha"</span>)); <span class="type"><a href="qslider.html">QSlider</a></span> <span class="operator">*</span>circleAlphaSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> circleAlphaGroup); circleAlphaSlider<span class="operator">-</span><span class="operator">></span>setRange(<span class="number">0</span><span class="operator">,</span> <span class="number">255</span>); circleAlphaSlider<span class="operator">-</span><span class="operator">></span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Preferred<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed); connect(circleAlphaSlider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> view<span class="operator">,</span> SLOT(setCircleAlpha(<span class="type">int</span>))); <span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>showSourceButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(mainGroup); showSourceButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Show Source"</span>)); <span class="preprocessor">#if defined(QT_OPENGL_SUPPORT) && !defined(QT_OPENGL_ES)</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>enableOpenGLButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(mainGroup); enableOpenGLButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Use OpenGL"</span>)); enableOpenGLButton<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); enableOpenGLButton<span class="operator">-</span><span class="operator">></span>setChecked(view<span class="operator">-</span><span class="operator">></span>usesOpenGL()); <span class="keyword">if</span> (<span class="operator">!</span><span class="type"><a href="qglformat.html">QGLFormat</a></span><span class="operator">::</span>hasOpenGL() <span class="operator">|</span><span class="operator">|</span> <span class="operator">!</span><span class="type"><a href="qglpixelbuffer.html">QGLPixelBuffer</a></span><span class="operator">::</span>hasOpenGLPbuffers()) enableOpenGLButton<span class="operator">-</span><span class="operator">></span>hide(); <span class="preprocessor">#endif</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>whatsThisButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(mainGroup); whatsThisButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"What's This?"</span>)); whatsThisButton<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); <span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>animateButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(mainGroup); animateButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Animated"</span>)); animateButton<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); animateButton<span class="operator">-</span><span class="operator">></span>setChecked(<span class="keyword">true</span>); <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span> <span class="operator">*</span>viewLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>(<span class="keyword">this</span>); viewLayout<span class="operator">-</span><span class="operator">></span>addWidget(view); viewLayout<span class="operator">-</span><span class="operator">></span>addWidget(mainGroup); <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>mainGroupLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(mainGroup); mainGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(circleColorGroup); mainGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(circleAlphaGroup); mainGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(modesGroup); mainGroupLayout<span class="operator">-</span><span class="operator">></span>addStretch(); mainGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(animateButton); mainGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(whatsThisButton); mainGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(showSourceButton); <span class="preprocessor">#if defined(QT_OPENGL_SUPPORT) && !defined(QT_OPENGL_ES)</span> mainGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(enableOpenGLButton); <span class="preprocessor">#endif</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span> <span class="operator">*</span>modesLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>(modesGroup); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbClear<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbSource<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbDest<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">0</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbSourceOver<span class="operator">,</span> <span class="number">3</span><span class="operator">,</span> <span class="number">0</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbDestOver<span class="operator">,</span> <span class="number">4</span><span class="operator">,</span> <span class="number">0</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbSourceIn<span class="operator">,</span> <span class="number">5</span><span class="operator">,</span> <span class="number">0</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbDestIn<span class="operator">,</span> <span class="number">6</span><span class="operator">,</span> <span class="number">0</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbSourceOut<span class="operator">,</span> <span class="number">7</span><span class="operator">,</span> <span class="number">0</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbDestOut<span class="operator">,</span> <span class="number">8</span><span class="operator">,</span> <span class="number">0</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbSourceAtop<span class="operator">,</span> <span class="number">9</span><span class="operator">,</span> <span class="number">0</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbDestAtop<span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> <span class="number">0</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbXor<span class="operator">,</span> <span class="number">11</span><span class="operator">,</span> <span class="number">0</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbPlus<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbMultiply<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbScreen<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">1</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbOverlay<span class="operator">,</span> <span class="number">3</span><span class="operator">,</span> <span class="number">1</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbDarken<span class="operator">,</span> <span class="number">4</span><span class="operator">,</span> <span class="number">1</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbLighten<span class="operator">,</span> <span class="number">5</span><span class="operator">,</span> <span class="number">1</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbColorDodge<span class="operator">,</span> <span class="number">6</span><span class="operator">,</span> <span class="number">1</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbColorBurn<span class="operator">,</span> <span class="number">7</span><span class="operator">,</span> <span class="number">1</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbHardLight<span class="operator">,</span> <span class="number">8</span><span class="operator">,</span> <span class="number">1</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbSoftLight<span class="operator">,</span> <span class="number">9</span><span class="operator">,</span> <span class="number">1</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbDifference<span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> <span class="number">1</span>); modesLayout<span class="operator">-</span><span class="operator">></span>addWidget(rbExclusion<span class="operator">,</span> <span class="number">11</span><span class="operator">,</span> <span class="number">1</span>); <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>circleColorLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(circleColorGroup); circleColorLayout<span class="operator">-</span><span class="operator">></span>addWidget(circleColorSlider); <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>circleAlphaLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(circleAlphaGroup); circleAlphaLayout<span class="operator">-</span><span class="operator">></span>addWidget(circleAlphaSlider); view<span class="operator">-</span><span class="operator">></span>loadDescription(<span class="string">":res/composition/composition.html"</span>); view<span class="operator">-</span><span class="operator">></span>loadSourceFile(<span class="string">":res/composition/composition.cpp"</span>); connect(whatsThisButton<span class="operator">,</span> SIGNAL(clicked(<span class="type">bool</span>))<span class="operator">,</span> view<span class="operator">,</span> SLOT(setDescriptionEnabled(<span class="type">bool</span>))); connect(view<span class="operator">,</span> SIGNAL(descriptionEnabledChanged(<span class="type">bool</span>))<span class="operator">,</span> whatsThisButton<span class="operator">,</span> SLOT(setChecked(<span class="type">bool</span>))); connect(showSourceButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> view<span class="operator">,</span> SLOT(showSource())); <span class="preprocessor">#if defined(QT_OPENGL_SUPPORT) && !defined(QT_OPENGL_ES)</span> connect(enableOpenGLButton<span class="operator">,</span> SIGNAL(clicked(<span class="type">bool</span>))<span class="operator">,</span> view<span class="operator">,</span> SLOT(enableOpenGL(<span class="type">bool</span>))); <span class="preprocessor">#endif</span> connect(animateButton<span class="operator">,</span> SIGNAL(toggled(<span class="type">bool</span>))<span class="operator">,</span> view<span class="operator">,</span> SLOT(setAnimationEnabled(<span class="type">bool</span>))); circleColorSlider<span class="operator">-</span><span class="operator">></span>setValue(<span class="number">270</span>); circleAlphaSlider<span class="operator">-</span><span class="operator">></span>setValue(<span class="number">200</span>); rbSourceOut<span class="operator">-</span><span class="operator">></span>animateClick(); setWindowTitle(tr(<span class="string">"Composition Modes"</span>)); } <span class="type">void</span> CompositionWidget<span class="operator">::</span>nextMode() { <span class="comment">/* if (!m_animation_enabled) return; if (rbClear->isChecked()) rbSource->animateClick(); if (rbSource->isChecked()) rbDest->animateClick(); if (rbDest->isChecked()) rbSourceOver->animateClick(); if (rbSourceOver->isChecked()) rbDestOver->animateClick(); if (rbDestOver->isChecked()) rbSourceIn->animateClick(); if (rbSourceIn->isChecked()) rbDestIn->animateClick(); if (rbDestIn->isChecked()) rbSourceOut->animateClick(); if (rbSourceOut->isChecked()) rbDestOut->animateClick(); if (rbDestOut->isChecked()) rbSourceAtop->animateClick(); if (rbSourceAtop->isChecked()) rbDestAtop->animateClick(); if (rbDestAtop->isChecked()) rbXor->animateClick(); if (rbXor->isChecked()) rbClear->animateClick(); */</span> } CompositionRenderer<span class="operator">::</span>CompositionRenderer(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : ArthurFrame(parent) { m_animation_enabled <span class="operator">=</span> <span class="keyword">true</span>; m_animationTimer <span class="operator">=</span> startTimer(animationInterval); <span class="preprocessor">#ifdef Q_WS_QWS</span> m_image <span class="operator">=</span> <span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">":res/composition/flower.jpg"</span>); m_image<span class="operator">.</span>setAlphaChannel(<span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">":res/composition/flower_alpha.jpg"</span>)); <span class="preprocessor">#else</span> m_image <span class="operator">=</span> <span class="type"><a href="qimage.html">QImage</a></span>(<span class="string">":res/composition/flower.jpg"</span>); m_image<span class="operator">.</span>setAlphaChannel(<span class="type"><a href="qimage.html">QImage</a></span>(<span class="string">":res/composition/flower_alpha.jpg"</span>)); <span class="preprocessor">#endif</span> m_circle_alpha <span class="operator">=</span> <span class="number">127</span>; m_circle_hue <span class="operator">=</span> <span class="number">255</span>; m_current_object <span class="operator">=</span> NoObject; m_composition_mode <span class="operator">=</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceOut; m_circle_pos <span class="operator">=</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(<span class="number">200</span><span class="operator">,</span> <span class="number">100</span>); setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Expanding<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Expanding); <span class="preprocessor">#ifdef QT_OPENGL_SUPPORT</span> m_pbuffer <span class="operator">=</span> <span class="number">0</span>; m_pbuffer_size <span class="operator">=</span> <span class="number">1024</span>; <span class="preprocessor">#endif</span> } <span class="type"><a href="qrectf.html">QRectF</a></span> rectangle_around(<span class="keyword">const</span> <span class="type"><a href="qpointf.html">QPointF</a></span> <span class="operator">&</span>p<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qsizef.html">QSizeF</a></span> <span class="operator">&</span>size <span class="operator">=</span> <span class="type"><a href="qsize.html">QSize</a></span>(<span class="number">250</span><span class="operator">,</span> <span class="number">200</span>)) { <span class="type"><a href="qrectf.html">QRectF</a></span> rect(p<span class="operator">,</span> size); rect<span class="operator">.</span>translate(<span class="operator">-</span>size<span class="operator">.</span>width()<span class="operator">/</span><span class="number">2</span><span class="operator">,</span> <span class="operator">-</span>size<span class="operator">.</span>height()<span class="operator">/</span><span class="number">2</span>); <span class="keyword">return</span> rect; } <span class="type">void</span> CompositionRenderer<span class="operator">::</span>setAnimationEnabled(<span class="type">bool</span> enabled) { <span class="keyword">if</span> (m_animation_enabled <span class="operator">=</span><span class="operator">=</span> enabled) <span class="keyword">return</span>; m_animation_enabled <span class="operator">=</span> enabled; <span class="keyword">if</span> (enabled) { Q_ASSERT(<span class="operator">!</span>m_animationTimer); m_animationTimer <span class="operator">=</span> startTimer(animationInterval); } <span class="keyword">else</span> { killTimer(m_animationTimer); m_animationTimer <span class="operator">=</span> <span class="number">0</span>; } } <span class="type">void</span> CompositionRenderer<span class="operator">::</span>updateCirclePos() { <span class="keyword">if</span> (m_current_object <span class="operator">!</span><span class="operator">=</span> NoObject) <span class="keyword">return</span>; <span class="type"><a href="qdatetime.html">QDateTime</a></span> dt <span class="operator">=</span> <span class="type"><a href="qdatetime.html">QDateTime</a></span><span class="operator">::</span>currentDateTime(); <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> t <span class="operator">=</span> (dt<span class="operator">.</span>toTime_t() <span class="operator">*</span> <span class="number">1000</span> <span class="operator">+</span> dt<span class="operator">.</span>time()<span class="operator">.</span>msec()) <span class="operator">/</span> <span class="number">1000.0</span>; <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x <span class="operator">=</span> width() <span class="operator">/</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">2</span>) <span class="operator">+</span> (<a href="qtcore-qmath-h.html#qCos">qCos</a>(t<span class="operator">*</span><span class="number">8</span><span class="operator">/</span><span class="number">11</span>) <span class="operator">+</span> <a href="qtcore-qmath-h.html#qSin">qSin</a>(<span class="operator">-</span>t)) <span class="operator">*</span> width() <span class="operator">/</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">4</span>); <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y <span class="operator">=</span> height() <span class="operator">/</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">2</span>) <span class="operator">+</span> (<a href="qtcore-qmath-h.html#qSin">qSin</a>(t<span class="operator">*</span><span class="number">6</span><span class="operator">/</span><span class="number">7</span>) <span class="operator">+</span> <a href="qtcore-qmath-h.html#qCos">qCos</a>(t <span class="operator">*</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">1.5</span>))) <span class="operator">*</span> height() <span class="operator">/</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">4</span>); setCirclePos(<span class="type"><a href="qlinef.html">QLineF</a></span>(m_circle_pos<span class="operator">,</span> <span class="type"><a href="qpointf.html">QPointF</a></span>(x<span class="operator">,</span> y))<span class="operator">.</span>pointAt(<span class="number">0.02</span>)); } <span class="type">void</span> CompositionRenderer<span class="operator">::</span>drawBase(<span class="type"><a href="qpainter.html">QPainter</a></span> <span class="operator">&</span>p) { p<span class="operator">.</span>setPen(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoPen); <span class="type"><a href="qlineargradient.html">QLinearGradient</a></span> rect_gradient(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> height()); rect_gradient<span class="operator">.</span>setColorAt(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>red); rect_gradient<span class="operator">.</span>setColorAt(<span class="operator">.</span><span class="number">17</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>yellow); rect_gradient<span class="operator">.</span>setColorAt(<span class="operator">.</span><span class="number">33</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>green); rect_gradient<span class="operator">.</span>setColorAt(<span class="operator">.</span><span class="number">50</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>cyan); rect_gradient<span class="operator">.</span>setColorAt(<span class="operator">.</span><span class="number">66</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>blue); rect_gradient<span class="operator">.</span>setColorAt(<span class="operator">.</span><span class="number">81</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>magenta); rect_gradient<span class="operator">.</span>setColorAt(<span class="number">1</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>red); p<span class="operator">.</span>setBrush(rect_gradient); p<span class="operator">.</span>drawRect(width() <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> width() <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> height()); <span class="type"><a href="qlineargradient.html">QLinearGradient</a></span> alpha_gradient(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> width()<span class="operator">,</span> <span class="number">0</span>); alpha_gradient<span class="operator">.</span>setColorAt(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>white); alpha_gradient<span class="operator">.</span>setColorAt(<span class="number">0.2</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>white); alpha_gradient<span class="operator">.</span>setColorAt(<span class="number">0.5</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>transparent); alpha_gradient<span class="operator">.</span>setColorAt(<span class="number">0.8</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>white); alpha_gradient<span class="operator">.</span>setColorAt(<span class="number">1</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>white); p<span class="operator">.</span>setCompositionMode(<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_DestinationIn); p<span class="operator">.</span>setBrush(alpha_gradient); p<span class="operator">.</span>drawRect(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> width()<span class="operator">,</span> height()); p<span class="operator">.</span>setCompositionMode(<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_DestinationOver); p<span class="operator">.</span>setPen(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoPen); p<span class="operator">.</span>setRenderHint(<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>SmoothPixmapTransform); <span class="preprocessor">#ifdef Q_WS_QWS</span> p<span class="operator">.</span>drawPixmap(rect()<span class="operator">,</span> m_image); <span class="preprocessor">#else</span> p<span class="operator">.</span>drawImage(rect()<span class="operator">,</span> m_image); <span class="preprocessor">#endif</span> } <span class="type">void</span> CompositionRenderer<span class="operator">::</span>drawSource(<span class="type"><a href="qpainter.html">QPainter</a></span> <span class="operator">&</span>p) { p<span class="operator">.</span>setPen(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoPen); p<span class="operator">.</span>setRenderHint(<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing); p<span class="operator">.</span>setCompositionMode(m_composition_mode); <span class="type"><a href="qrectf.html">QRectF</a></span> circle_rect <span class="operator">=</span> rectangle_around(m_circle_pos); <span class="type"><a href="qcolor.html">QColor</a></span> color <span class="operator">=</span> <span class="type"><a href="qcolor.html">QColor</a></span><span class="operator">::</span>fromHsvF(m_circle_hue <span class="operator">/</span> <span class="number">360.0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> m_circle_alpha <span class="operator">/</span> <span class="number">255.0</span>); <span class="type"><a href="qlineargradient.html">QLinearGradient</a></span> circle_gradient(circle_rect<span class="operator">.</span>topLeft()<span class="operator">,</span> circle_rect<span class="operator">.</span>bottomRight()); circle_gradient<span class="operator">.</span>setColorAt(<span class="number">0</span><span class="operator">,</span> color<span class="operator">.</span>light()); circle_gradient<span class="operator">.</span>setColorAt(<span class="number">0.5</span><span class="operator">,</span> color); circle_gradient<span class="operator">.</span>setColorAt(<span class="number">1</span><span class="operator">,</span> color<span class="operator">.</span>dark()); p<span class="operator">.</span>setBrush(circle_gradient); p<span class="operator">.</span>drawEllipse(circle_rect); } <span class="type">void</span> CompositionRenderer<span class="operator">::</span>paint(<span class="type"><a href="qpainter.html">QPainter</a></span> <span class="operator">*</span>painter) { <span class="preprocessor">#if defined(QT_OPENGL_SUPPORT) && !defined(QT_OPENGL_ES)</span> <span class="keyword">if</span> (usesOpenGL()) { <span class="type">int</span> new_pbuf_size <span class="operator">=</span> m_pbuffer_size; <span class="keyword">if</span> (size()<span class="operator">.</span>width() <span class="operator">></span> m_pbuffer_size <span class="operator">|</span><span class="operator">|</span> size()<span class="operator">.</span>height() <span class="operator">></span> m_pbuffer_size) new_pbuf_size <span class="operator">*</span><span class="operator">=</span> <span class="number">2</span>; <span class="keyword">if</span> (size()<span class="operator">.</span>width() <span class="operator"><</span> m_pbuffer_size<span class="operator">/</span><span class="number">2</span> <span class="operator">&</span><span class="operator">&</span> size()<span class="operator">.</span>height() <span class="operator"><</span> m_pbuffer_size<span class="operator">/</span><span class="number">2</span>) new_pbuf_size <span class="operator">/</span><span class="operator">=</span> <span class="number">2</span>; <span class="keyword">if</span> (<span class="operator">!</span>m_pbuffer <span class="operator">|</span><span class="operator">|</span> new_pbuf_size <span class="operator">!</span><span class="operator">=</span> m_pbuffer_size) { <span class="keyword">if</span> (m_pbuffer) { m_pbuffer<span class="operator">-</span><span class="operator">></span>deleteTexture(m_base_tex); m_pbuffer<span class="operator">-</span><span class="operator">></span>deleteTexture(m_compositing_tex); <span class="keyword">delete</span> m_pbuffer; } m_pbuffer <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qglpixelbuffer.html">QGLPixelBuffer</a></span>(<span class="type"><a href="qsize.html">QSize</a></span>(new_pbuf_size<span class="operator">,</span> new_pbuf_size)<span class="operator">,</span> <span class="type"><a href="qglformat.html">QGLFormat</a></span><span class="operator">::</span>defaultFormat()<span class="operator">,</span> glWidget()); m_pbuffer<span class="operator">-</span><span class="operator">></span>makeCurrent(); m_base_tex <span class="operator">=</span> m_pbuffer<span class="operator">-</span><span class="operator">></span>generateDynamicTexture(); m_compositing_tex <span class="operator">=</span> m_pbuffer<span class="operator">-</span><span class="operator">></span>generateDynamicTexture(); m_pbuffer_size <span class="operator">=</span> new_pbuf_size; } <span class="keyword">if</span> (size() <span class="operator">!</span><span class="operator">=</span> m_previous_size) { m_previous_size <span class="operator">=</span> size(); <span class="type"><a href="qpainter.html">QPainter</a></span> p(m_pbuffer); p<span class="operator">.</span>setCompositionMode(<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Source); p<span class="operator">.</span>fillRect(<span class="type"><a href="qrect.html">QRect</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> m_pbuffer<span class="operator">-</span><span class="operator">></span>width()<span class="operator">,</span> m_pbuffer<span class="operator">-</span><span class="operator">></span>height())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>transparent); drawBase(p); p<span class="operator">.</span>end(); m_pbuffer<span class="operator">-</span><span class="operator">></span>updateDynamicTexture(m_base_tex); } <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x_fraction <span class="operator">=</span> width()<span class="operator">/</span><span class="type">float</span>(m_pbuffer<span class="operator">-</span><span class="operator">></span>width()); <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y_fraction <span class="operator">=</span> height()<span class="operator">/</span><span class="type">float</span>(m_pbuffer<span class="operator">-</span><span class="operator">></span>height()); { <span class="type"><a href="qpainter.html">QPainter</a></span> p(m_pbuffer); p<span class="operator">.</span>setCompositionMode(<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Source); p<span class="operator">.</span>fillRect(<span class="type"><a href="qrect.html">QRect</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> m_pbuffer<span class="operator">-</span><span class="operator">></span>width()<span class="operator">,</span> m_pbuffer<span class="operator">-</span><span class="operator">></span>height())<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>transparent); p<span class="operator">.</span>save(); <span class="comment">// Needed when using the GL1 engine</span> p<span class="operator">.</span>beginNativePainting(); <span class="comment">// Needed when using the GL2 engine</span> glBindTexture(GL_TEXTURE_2D<span class="operator">,</span> m_base_tex); glEnable(GL_TEXTURE_2D); glColor4f(<span class="number">1.</span><span class="operator">,</span><span class="number">1.</span><span class="operator">,</span><span class="number">1.</span><span class="operator">,</span><span class="number">1.</span>); glBegin(GL_QUADS); { glTexCoord2f(<span class="number">0</span><span class="operator">,</span> <span class="number">1.0</span>); glVertex2f(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span>); glTexCoord2f(x_fraction<span class="operator">,</span> <span class="number">1.0</span>); glVertex2f(width()<span class="operator">,</span> <span class="number">0</span>); glTexCoord2f(x_fraction<span class="operator">,</span> <span class="number">1.0</span><span class="operator">-</span>y_fraction); glVertex2f(width()<span class="operator">,</span> height()); glTexCoord2f(<span class="number">0</span><span class="operator">,</span> <span class="number">1.0</span><span class="operator">-</span>y_fraction); glVertex2f(<span class="number">0</span><span class="operator">,</span> height()); } glEnd(); glDisable(GL_TEXTURE_2D); p<span class="operator">.</span>endNativePainting(); <span class="comment">// Needed when using the GL2 engine</span> p<span class="operator">.</span>restore(); <span class="comment">// Needed when using the GL1 engine</span> drawSource(p); p<span class="operator">.</span>end(); m_pbuffer<span class="operator">-</span><span class="operator">></span>updateDynamicTexture(m_compositing_tex); } painter<span class="operator">-</span><span class="operator">></span>beginNativePainting(); <span class="comment">// Needed when using the GL2 engine</span> glWidget()<span class="operator">-</span><span class="operator">></span>makeCurrent(); <span class="comment">// Needed when using the GL1 engine</span> glBindTexture(GL_TEXTURE_2D<span class="operator">,</span> m_compositing_tex); glEnable(GL_TEXTURE_2D); glEnable(GL_BLEND); glBlendFunc(GL_ONE<span class="operator">,</span> GL_ONE_MINUS_SRC_ALPHA); glColor4f(<span class="number">1.</span><span class="operator">,</span><span class="number">1.</span><span class="operator">,</span><span class="number">1.</span><span class="operator">,</span><span class="number">1.</span>); glBegin(GL_QUADS); { glTexCoord2f(<span class="number">0</span><span class="operator">,</span> <span class="number">1.0</span>); glVertex2f(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span>); glTexCoord2f(x_fraction<span class="operator">,</span> <span class="number">1.0</span>); glVertex2f(width()<span class="operator">,</span> <span class="number">0</span>); glTexCoord2f(x_fraction<span class="operator">,</span> <span class="number">1.0</span><span class="operator">-</span>y_fraction); glVertex2f(width()<span class="operator">,</span> height()); glTexCoord2f(<span class="number">0</span><span class="operator">,</span> <span class="number">1.0</span><span class="operator">-</span>y_fraction); glVertex2f(<span class="number">0</span><span class="operator">,</span> height()); } glEnd(); glDisable(GL_TEXTURE_2D); painter<span class="operator">-</span><span class="operator">></span>endNativePainting(); <span class="comment">// Needed when using the GL2 engine</span> } <span class="keyword">else</span> <span class="preprocessor">#endif</span> { <span class="comment">// using a QImage</span> <span class="keyword">if</span> (m_buffer<span class="operator">.</span>size() <span class="operator">!</span><span class="operator">=</span> size()) { <span class="preprocessor">#ifdef Q_WS_QWS</span> m_base_buffer <span class="operator">=</span> <span class="type"><a href="qpixmap.html">QPixmap</a></span>(size()); m_base_buffer<span class="operator">.</span>fill(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>transparent); <span class="preprocessor">#else</span> m_buffer <span class="operator">=</span> <span class="type"><a href="qimage.html">QImage</a></span>(size()<span class="operator">,</span> <span class="type"><a href="qimage.html">QImage</a></span><span class="operator">::</span>Format_ARGB32_Premultiplied); m_base_buffer <span class="operator">=</span> <span class="type"><a href="qimage.html">QImage</a></span>(size()<span class="operator">,</span> <span class="type"><a href="qimage.html">QImage</a></span><span class="operator">::</span>Format_ARGB32_Premultiplied); m_base_buffer<span class="operator">.</span>fill(<span class="number">0</span>); <span class="preprocessor">#endif</span> <span class="type"><a href="qpainter.html">QPainter</a></span> p(<span class="operator">&</span>m_base_buffer); drawBase(p); } <span class="preprocessor">#ifdef Q_WS_QWS</span> m_buffer <span class="operator">=</span> m_base_buffer; <span class="preprocessor">#else</span> memcpy(m_buffer<span class="operator">.</span>bits()<span class="operator">,</span> m_base_buffer<span class="operator">.</span>bits()<span class="operator">,</span> m_buffer<span class="operator">.</span>byteCount()); <span class="preprocessor">#endif</span> { <span class="type"><a href="qpainter.html">QPainter</a></span> p(<span class="operator">&</span>m_buffer); drawSource(p); } <span class="preprocessor">#ifdef Q_WS_QWS</span> painter<span class="operator">-</span><span class="operator">></span>drawPixmap(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> m_buffer); <span class="preprocessor">#else</span> painter<span class="operator">-</span><span class="operator">></span>drawImage(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> m_buffer); <span class="preprocessor">#endif</span> } } <span class="type">void</span> CompositionRenderer<span class="operator">::</span>mousePressEvent(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>e) { setDescriptionEnabled(<span class="keyword">false</span>); <span class="type"><a href="qrectf.html">QRectF</a></span> circle <span class="operator">=</span> rectangle_around(m_circle_pos); <span class="keyword">if</span> (circle<span class="operator">.</span>contains(e<span class="operator">-</span><span class="operator">></span>pos())) { m_current_object <span class="operator">=</span> Circle; m_offset <span class="operator">=</span> circle<span class="operator">.</span>center() <span class="operator">-</span> e<span class="operator">-</span><span class="operator">></span>pos(); } <span class="keyword">else</span> { m_current_object <span class="operator">=</span> NoObject; } <span class="keyword">if</span> (m_animation_enabled) { killTimer(m_animationTimer); m_animationTimer <span class="operator">=</span> <span class="number">0</span>; } } <span class="type">void</span> CompositionRenderer<span class="operator">::</span>mouseMoveEvent(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>e) { <span class="keyword">if</span> (m_current_object <span class="operator">=</span><span class="operator">=</span> Circle) setCirclePos(e<span class="operator">-</span><span class="operator">></span>pos() <span class="operator">+</span> m_offset); } <span class="type">void</span> CompositionRenderer<span class="operator">::</span>mouseReleaseEvent(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>) { m_current_object <span class="operator">=</span> NoObject; <span class="keyword">if</span> (m_animation_enabled) { Q_ASSERT(<span class="operator">!</span>m_animationTimer); m_animationTimer <span class="operator">=</span> startTimer(animationInterval); } } <span class="type">void</span> CompositionRenderer<span class="operator">::</span>timerEvent(<span class="type"><a href="qtimerevent.html">QTimerEvent</a></span> <span class="operator">*</span>event) { <span class="keyword">if</span> (event<span class="operator">-</span><span class="operator">></span>timerId() <span class="operator">=</span><span class="operator">=</span> m_animationTimer) updateCirclePos(); } <span class="type">void</span> CompositionRenderer<span class="operator">::</span>setCirclePos(<span class="keyword">const</span> <span class="type"><a href="qpointf.html">QPointF</a></span> <span class="operator">&</span>pos) { <span class="keyword">const</span> <span class="type"><a href="qrect.html">QRect</a></span> oldRect <span class="operator">=</span> rectangle_around(m_circle_pos)<span class="operator">.</span>toAlignedRect(); m_circle_pos <span class="operator">=</span> pos; <span class="keyword">const</span> <span class="type"><a href="qrect.html">QRect</a></span> newRect <span class="operator">=</span> rectangle_around(m_circle_pos)<span class="operator">.</span>toAlignedRect(); <span class="preprocessor">#if defined(QT_OPENGL_SUPPORT) && !defined(QT_OPENGL_ES)</span> <span class="keyword">if</span> (usesOpenGL()) update(); <span class="keyword">else</span> <span class="preprocessor">#endif</span> update(oldRect <span class="operator">|</span> newRect); }</pre> </div> <!-- @@@demos/composition/composition.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.</p> <br /> <p> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.</p> <p> Documentation sources may be obtained from <a href="http://www.qt-project.org"> www.qt-project.org</a>.</p> <br /> <p> Qt and respective logos are trademarks of The Qt Company Ltd in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. <a title="Privacy Policy" href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p> </div> <script src="scripts/functions.js" type="text/javascript"></script> </body> </html>