<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>window.cpp Example File | Qt Core 5.12.6</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtcore-index.html">Qt Core</a></td><td ><a href="qtcore-threads-queuedcustomtype-example.html">Queued Custom Type Example</a></td><td >window.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtcore-index.html">Qt 5.12.6 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">window.cpp Example File</h1> <span class="subtitle">threads/queuedcustomtype/window.cpp</span> <!-- $$$threads/queuedcustomtype/window.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** 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 https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, 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 The Qt Company Ltd 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 <QtWidgets></span> <span class="preprocessor">#include "window.h"</span> Window<span class="operator">::</span>Window() { thread <span class="operator">=</span> <span class="keyword">new</span> RenderThread(); label <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qlabel.html">QLabel</a></span>(); label<span class="operator">-</span><span class="operator">></span>setAlignment(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>AlignCenter); loadButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"&Load image..."</span>)); resetButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"&Stop"</span>)); resetButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); connect(loadButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(loadImage())); connect(resetButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> thread<span class="operator">,</span> SLOT(stopProcess())); connect(thread<span class="operator">,</span> SIGNAL(finished())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(resetUi())); connect(thread<span class="operator">,</span> SIGNAL(sendBlock(Block))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(addBlock(Block))); <span class="type"><a href="../qtwidgets/qhboxlayout.html">QHBoxLayout</a></span> <span class="operator">*</span>buttonLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qhboxlayout.html">QHBoxLayout</a></span>(); buttonLayout<span class="operator">-</span><span class="operator">></span>addStretch(); buttonLayout<span class="operator">-</span><span class="operator">></span>addWidget(loadButton); buttonLayout<span class="operator">-</span><span class="operator">></span>addWidget(resetButton); buttonLayout<span class="operator">-</span><span class="operator">></span>addStretch(); <span class="type"><a href="../qtwidgets/qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>layout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qvboxlayout.html">QVBoxLayout</a></span>(<span class="keyword">this</span>); layout<span class="operator">-</span><span class="operator">></span>addWidget(label); layout<span class="operator">-</span><span class="operator">></span>addLayout(buttonLayout); setWindowTitle(tr(<span class="string">"Queued Custom Type"</span>)); } <span class="type">void</span> Window<span class="operator">::</span>loadImage() { <span class="type"><a href="qstringlist.html">QStringList</a></span> formats; foreach (<span class="type"><a href="qbytearray.html">QByteArray</a></span> format<span class="operator">,</span> <span class="type"><a href="../qtgui/qimagereader.html">QImageReader</a></span><span class="operator">::</span>supportedImageFormats()) <span class="keyword">if</span> (format<span class="operator">.</span>toLower() <span class="operator">=</span><span class="operator">=</span> format) formats<span class="operator">.</span>append(<span class="string">"*."</span> <span class="operator">+</span> format); <span class="type"><a href="qstring.html">QString</a></span> newPath <span class="operator">=</span> <span class="type"><a href="../qtwidgets/qfiledialog.html">QFileDialog</a></span><span class="operator">::</span>getOpenFileName(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Open Image"</span>)<span class="operator">,</span> path<span class="operator">,</span> tr(<span class="string">"Image files (%1)"</span>)<span class="operator">.</span>arg(formats<span class="operator">.</span>join(<span class="char">' '</span>))); <span class="keyword">if</span> (newPath<span class="operator">.</span>isEmpty()) <span class="keyword">return</span>; <span class="type"><a href="../qtgui/qimage.html">QImage</a></span> image(newPath); <span class="keyword">if</span> (<span class="operator">!</span>image<span class="operator">.</span>isNull()) { loadImage(image); path <span class="operator">=</span> newPath; } } <span class="type">void</span> Window<span class="operator">::</span>loadImage(<span class="keyword">const</span> <span class="type"><a href="../qtgui/qimage.html">QImage</a></span> <span class="operator">&</span>image) { <span class="type"><a href="../qtgui/qimage.html">QImage</a></span> useImage; <span class="type"><a href="qrect.html">QRect</a></span> space <span class="operator">=</span> <span class="type"><a href="../qtgui/qguiapplication.html">QGuiApplication</a></span><span class="operator">::</span>primaryScreen()<span class="operator">-</span><span class="operator">></span>availableGeometry(); <span class="keyword">if</span> (image<span class="operator">.</span>width() <span class="operator">></span> <span class="number">0.75</span><span class="operator">*</span>space<span class="operator">.</span>width() <span class="operator">|</span><span class="operator">|</span> image<span class="operator">.</span>height() <span class="operator">></span> <span class="number">0.75</span><span class="operator">*</span>space<span class="operator">.</span>height()) useImage <span class="operator">=</span> image<span class="operator">.</span>scaled(<span class="number">0.75</span><span class="operator">*</span>space<span class="operator">.</span>width()<span class="operator">,</span> <span class="number">0.75</span><span class="operator">*</span>space<span class="operator">.</span>height()<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>KeepAspectRatio<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SmoothTransformation); <span class="keyword">else</span> useImage <span class="operator">=</span> image; pixmap <span class="operator">=</span> <span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span>(useImage<span class="operator">.</span>width()<span class="operator">,</span> useImage<span class="operator">.</span>height()); pixmap<span class="operator">.</span>fill(<a href="../qtgui/qcolor.html#qRgb">qRgb</a>(<span class="number">255</span><span class="operator">,</span> <span class="number">255</span><span class="operator">,</span> <span class="number">255</span>)); label<span class="operator">-</span><span class="operator">></span>setPixmap(pixmap); loadButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); resetButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">true</span>); thread<span class="operator">-</span><span class="operator">></span>processImage(useImage); } <span class="type">void</span> Window<span class="operator">::</span>addBlock(<span class="keyword">const</span> Block <span class="operator">&</span>block) { <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> color <span class="operator">=</span> block<span class="operator">.</span>color(); color<span class="operator">.</span>setAlpha(<span class="number">64</span>); <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> painter; painter<span class="operator">.</span>begin(<span class="operator">&</span>pixmap); painter<span class="operator">.</span>fillRect(block<span class="operator">.</span>rect()<span class="operator">,</span> color); painter<span class="operator">.</span>end(); label<span class="operator">-</span><span class="operator">></span>setPixmap(pixmap); } <span class="type">void</span> Window<span class="operator">::</span>resetUi() { loadButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">true</span>); resetButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); } </pre> </div> <!-- @@@threads/queuedcustomtype/window.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> 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.<br/> 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. </p> </div> </body> </html>