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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">mainwindow.cpp Example File</h1> <span class="small-subtitle">opengl/grabber/mainwindow.cpp</span> <!-- $$$opengl/grabber/mainwindow.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** You may use this file under the terms of the BSD license as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names ** of its contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include <QtGui></span> <span class="preprocessor">#include <QtOpenGL></span> <span class="preprocessor">#include "glwidget.h"</span> <span class="preprocessor">#include "mainwindow.h"</span> MainWindow<span class="operator">::</span>MainWindow() { centralWidget <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qwidget.html">QWidget</a></span>; setCentralWidget(centralWidget); glWidget <span class="operator">=</span> <span class="keyword">new</span> GLWidget; pixmapLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>; glWidgetArea <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qscrollarea.html">QScrollArea</a></span>; glWidgetArea<span class="operator">-</span><span class="operator">></span>setWidget(glWidget); glWidgetArea<span class="operator">-</span><span class="operator">></span>setWidgetResizable(<span class="keyword">true</span>); glWidgetArea<span class="operator">-</span><span class="operator">></span>setHorizontalScrollBarPolicy(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ScrollBarAlwaysOff); glWidgetArea<span class="operator">-</span><span class="operator">></span>setVerticalScrollBarPolicy(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ScrollBarAlwaysOff); glWidgetArea<span class="operator">-</span><span class="operator">></span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Ignored<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Ignored); glWidgetArea<span class="operator">-</span><span class="operator">></span>setMinimumSize(<span class="number">50</span><span class="operator">,</span> <span class="number">50</span>); pixmapLabelArea <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qscrollarea.html">QScrollArea</a></span>; pixmapLabelArea<span class="operator">-</span><span class="operator">></span>setWidget(pixmapLabel); pixmapLabelArea<span class="operator">-</span><span class="operator">></span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Ignored<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Ignored); pixmapLabelArea<span class="operator">-</span><span class="operator">></span>setMinimumSize(<span class="number">50</span><span class="operator">,</span> <span class="number">50</span>); xSlider <span class="operator">=</span> createSlider(SIGNAL(xRotationChanged(<span class="type">int</span>))<span class="operator">,</span> SLOT(setXRotation(<span class="type">int</span>))); ySlider <span class="operator">=</span> createSlider(SIGNAL(yRotationChanged(<span class="type">int</span>))<span class="operator">,</span> SLOT(setYRotation(<span class="type">int</span>))); zSlider <span class="operator">=</span> createSlider(SIGNAL(zRotationChanged(<span class="type">int</span>))<span class="operator">,</span> SLOT(setZRotation(<span class="type">int</span>))); createActions(); createMenus(); <span class="type"><a href="qgridlayout.html">QGridLayout</a></span> <span class="operator">*</span>centralLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>; centralLayout<span class="operator">-</span><span class="operator">></span>addWidget(glWidgetArea<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>); centralLayout<span class="operator">-</span><span class="operator">></span>addWidget(pixmapLabelArea<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span>); centralLayout<span class="operator">-</span><span class="operator">></span>addWidget(xSlider<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">2</span>); centralLayout<span class="operator">-</span><span class="operator">></span>addWidget(ySlider<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">2</span>); centralLayout<span class="operator">-</span><span class="operator">></span>addWidget(zSlider<span class="operator">,</span> <span class="number">3</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">2</span>); centralWidget<span class="operator">-</span><span class="operator">></span>setLayout(centralLayout); xSlider<span class="operator">-</span><span class="operator">></span>setValue(<span class="number">15</span> <span class="operator">*</span> <span class="number">16</span>); ySlider<span class="operator">-</span><span class="operator">></span>setValue(<span class="number">345</span> <span class="operator">*</span> <span class="number">16</span>); zSlider<span class="operator">-</span><span class="operator">></span>setValue(<span class="number">0</span> <span class="operator">*</span> <span class="number">16</span>); setWindowTitle(tr(<span class="string">"Grabber"</span>)); resize(<span class="number">400</span><span class="operator">,</span> <span class="number">300</span>); } <span class="type">void</span> MainWindow<span class="operator">::</span>renderIntoPixmap() { <span class="type"><a href="qsize.html">QSize</a></span> size <span class="operator">=</span> getSize(); <span class="keyword">if</span> (size<span class="operator">.</span>isValid()) { <span class="type"><a href="qpixmap.html">QPixmap</a></span> pixmap <span class="operator">=</span> glWidget<span class="operator">-</span><span class="operator">></span>renderPixmap(size<span class="operator">.</span>width()<span class="operator">,</span> size<span class="operator">.</span>height()); setPixmap(pixmap); } } <span class="type">void</span> MainWindow<span class="operator">::</span>grabFrameBuffer() { <span class="type"><a href="qimage.html">QImage</a></span> image <span class="operator">=</span> glWidget<span class="operator">-</span><span class="operator">></span>grabFrameBuffer(); setPixmap(<span class="type"><a href="qpixmap.html">QPixmap</a></span><span class="operator">::</span>fromImage(image)); } <span class="type">void</span> MainWindow<span class="operator">::</span>clearPixmap() { setPixmap(<span class="type"><a href="qpixmap.html">QPixmap</a></span>()); } <span class="type">void</span> MainWindow<span class="operator">::</span>about() { <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>about(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"About Grabber"</span>)<span class="operator">,</span> tr(<span class="string">"The <b>Grabber</b> example demonstrates two approaches for "</span> <span class="string">"rendering OpenGL into a Qt pixmap."</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>createActions() { renderIntoPixmapAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Render into Pixmap..."</span>)<span class="operator">,</span> <span class="keyword">this</span>); renderIntoPixmapAct<span class="operator">-</span><span class="operator">></span>setShortcut(tr(<span class="string">"Ctrl+R"</span>)); connect(renderIntoPixmapAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(renderIntoPixmap())); grabFrameBufferAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Grab Frame Buffer"</span>)<span class="operator">,</span> <span class="keyword">this</span>); grabFrameBufferAct<span class="operator">-</span><span class="operator">></span>setShortcut(tr(<span class="string">"Ctrl+G"</span>)); connect(grabFrameBufferAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(grabFrameBuffer())); clearPixmapAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Clear Pixmap"</span>)<span class="operator">,</span> <span class="keyword">this</span>); clearPixmapAct<span class="operator">-</span><span class="operator">></span>setShortcut(tr(<span class="string">"Ctrl+L"</span>)); connect(clearPixmapAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(clearPixmap())); exitAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"E&xit"</span>)<span class="operator">,</span> <span class="keyword">this</span>); exitAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Quit); connect(exitAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(close())); aboutAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&About"</span>)<span class="operator">,</span> <span class="keyword">this</span>); connect(aboutAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(about())); aboutQtAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"About &Qt"</span>)<span class="operator">,</span> <span class="keyword">this</span>); connect(aboutQtAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> qApp<span class="operator">,</span> SLOT(aboutQt())); } <span class="type">void</span> MainWindow<span class="operator">::</span>createMenus() { fileMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&File"</span>)); fileMenu<span class="operator">-</span><span class="operator">></span>addAction(renderIntoPixmapAct); fileMenu<span class="operator">-</span><span class="operator">></span>addAction(grabFrameBufferAct); fileMenu<span class="operator">-</span><span class="operator">></span>addAction(clearPixmapAct); fileMenu<span class="operator">-</span><span class="operator">></span>addSeparator(); fileMenu<span class="operator">-</span><span class="operator">></span>addAction(exitAct); helpMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Help"</span>)); helpMenu<span class="operator">-</span><span class="operator">></span>addAction(aboutAct); helpMenu<span class="operator">-</span><span class="operator">></span>addAction(aboutQtAct); } <span class="type"><a href="qslider.html">QSlider</a></span> <span class="operator">*</span>MainWindow<span class="operator">::</span>createSlider(<span class="keyword">const</span> <span class="type">char</span> <span class="operator">*</span>changedSignal<span class="operator">,</span> <span class="keyword">const</span> <span class="type">char</span> <span class="operator">*</span>setterSlot) { <span class="type"><a href="qslider.html">QSlider</a></span> <span class="operator">*</span>slider <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); slider<span class="operator">-</span><span class="operator">></span>setRange(<span class="number">0</span><span class="operator">,</span> <span class="number">360</span> <span class="operator">*</span> <span class="number">16</span>); slider<span class="operator">-</span><span class="operator">></span>setSingleStep(<span class="number">16</span>); slider<span class="operator">-</span><span class="operator">></span>setPageStep(<span class="number">15</span> <span class="operator">*</span> <span class="number">16</span>); slider<span class="operator">-</span><span class="operator">></span>setTickInterval(<span class="number">15</span> <span class="operator">*</span> <span class="number">16</span>); slider<span class="operator">-</span><span class="operator">></span>setTickPosition(<span class="type"><a href="qslider.html">QSlider</a></span><span class="operator">::</span>TicksRight); connect(slider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> glWidget<span class="operator">,</span> setterSlot); connect(glWidget<span class="operator">,</span> changedSignal<span class="operator">,</span> slider<span class="operator">,</span> SLOT(setValue(<span class="type">int</span>))); <span class="keyword">return</span> slider; } <span class="type">void</span> MainWindow<span class="operator">::</span>setPixmap(<span class="keyword">const</span> <span class="type"><a href="qpixmap.html">QPixmap</a></span> <span class="operator">&</span>pixmap) { pixmapLabel<span class="operator">-</span><span class="operator">></span>setPixmap(pixmap); <span class="type"><a href="qsize.html">QSize</a></span> size <span class="operator">=</span> pixmap<span class="operator">.</span>size(); <span class="keyword">if</span> (size <span class="operator">-</span> <span class="type"><a href="qsize.html">QSize</a></span>(<span class="number">1</span><span class="operator">,</span> <span class="number">0</span>) <span class="operator">=</span><span class="operator">=</span> pixmapLabelArea<span class="operator">-</span><span class="operator">></span>maximumViewportSize()) size <span class="operator">-</span><span class="operator">=</span> <span class="type"><a href="qsize.html">QSize</a></span>(<span class="number">1</span><span class="operator">,</span> <span class="number">0</span>); pixmapLabel<span class="operator">-</span><span class="operator">></span>resize(size); } <span class="type"><a href="qsize.html">QSize</a></span> MainWindow<span class="operator">::</span>getSize() { <span class="type">bool</span> ok; <span class="type"><a href="qstring.html">QString</a></span> text <span class="operator">=</span> <span class="type"><a href="qinputdialog.html">QInputDialog</a></span><span class="operator">::</span>getText(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Grabber"</span>)<span class="operator">,</span> tr(<span class="string">"Enter pixmap size:"</span>)<span class="operator">,</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span><span class="operator">::</span>Normal<span class="operator">,</span> tr(<span class="string">"%1 x %2"</span>)<span class="operator">.</span>arg(glWidget<span class="operator">-</span><span class="operator">></span>width()) <span class="operator">.</span>arg(glWidget<span class="operator">-</span><span class="operator">></span>height())<span class="operator">,</span> <span class="operator">&</span>ok); <span class="keyword">if</span> (<span class="operator">!</span>ok) <span class="keyword">return</span> <span class="type"><a href="qsize.html">QSize</a></span>(); <span class="type"><a href="qregexp.html">QRegExp</a></span> regExp(tr(<span class="string">"([0-9]+) *x *([0-9]+)"</span>)); <span class="keyword">if</span> (regExp<span class="operator">.</span>exactMatch(text)) { <span class="type">int</span> width <span class="operator">=</span> regExp<span class="operator">.</span>cap(<span class="number">1</span>)<span class="operator">.</span>toInt(); <span class="type">int</span> height <span class="operator">=</span> regExp<span class="operator">.</span>cap(<span class="number">2</span>)<span class="operator">.</span>toInt(); <span class="keyword">if</span> (width <span class="operator">></span> <span class="number">0</span> <span class="operator">&</span><span class="operator">&</span> width <span class="operator"><</span> <span class="number">2048</span> <span class="operator">&</span><span class="operator">&</span> height <span class="operator">></span> <span class="number">0</span> <span class="operator">&</span><span class="operator">&</span> height <span class="operator"><</span> <span class="number">2048</span>) <span class="keyword">return</span> <span class="type"><a href="qsize.html">QSize</a></span>(width<span class="operator">,</span> height); } <span class="keyword">return</span> glWidget<span class="operator">-</span><span class="operator">></span>size(); }</pre> </div> <!-- @@@opengl/grabber/mainwindow.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its subsidiaries. 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