<?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>main.cpp Example File | Qt Widgets 5.12.2</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="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-graphicsview-anchorlayout-example.html">Anchor Layout Example</a></td><td >main.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtwidgets-index.html">Qt 5.12.2 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">main.cpp Example File</h1> <span class="subtitle">graphicsview/anchorlayout/main.cpp</span> <!-- $$$graphicsview/anchorlayout/main.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="keyword">static</span> <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span> <span class="operator">*</span>createItem(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qsizef.html">QSizeF</a></span> <span class="operator">&</span>minimum <span class="operator">=</span> <span class="type"><a href="../qtcore/qsizef.html">QSizeF</a></span>(<span class="number">100.0</span><span class="operator">,</span> <span class="number">100.0</span>)<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qsizef.html">QSizeF</a></span> <span class="operator">&</span>preferred <span class="operator">=</span> <span class="type"><a href="../qtcore/qsize.html">QSize</a></span>(<span class="number">150.0</span><span class="operator">,</span> <span class="number">100.0</span>)<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qsizef.html">QSizeF</a></span> <span class="operator">&</span>maximum <span class="operator">=</span> <span class="type"><a href="../qtcore/qsizef.html">QSizeF</a></span>(<span class="number">200.0</span><span class="operator">,</span> <span class="number">100.0</span>)<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>name <span class="operator">=</span> <span class="string">"0"</span>) { <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span> <span class="operator">*</span>w <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span>; w<span class="operator">-</span><span class="operator">></span>setWidget(<span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(name)); w<span class="operator">-</span><span class="operator">></span>setData(<span class="number">0</span><span class="operator">,</span> name); w<span class="operator">-</span><span class="operator">></span>setMinimumSize(minimum); w<span class="operator">-</span><span class="operator">></span>setPreferredSize(preferred); w<span class="operator">-</span><span class="operator">></span>setMaximumSize(maximum); w<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>Preferred); <span class="keyword">return</span> w; } <span class="type">int</span> main(<span class="type">int</span> argc<span class="operator">,</span> <span class="type">char</span> <span class="operator">*</span><span class="operator">*</span>argv) { <span class="type"><a href="qapplication.html">QApplication</a></span> app(argc<span class="operator">,</span> argv); <span class="type"><a href="qgraphicsscene.html">QGraphicsScene</a></span> scene; scene<span class="operator">.</span>setSceneRect(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">800</span><span class="operator">,</span> <span class="number">480</span>); <span class="type"><a href="../qtcore/qsizef.html">QSizeF</a></span> minSize(<span class="number">30</span><span class="operator">,</span> <span class="number">100</span>); <span class="type"><a href="../qtcore/qsizef.html">QSizeF</a></span> prefSize(<span class="number">210</span><span class="operator">,</span> <span class="number">100</span>); <span class="type"><a href="../qtcore/qsizef.html">QSizeF</a></span> maxSize(<span class="number">300</span><span class="operator">,</span> <span class="number">100</span>); <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span> <span class="operator">*</span>a <span class="operator">=</span> createItem(minSize<span class="operator">,</span> prefSize<span class="operator">,</span> maxSize<span class="operator">,</span> <span class="string">"A"</span>); <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span> <span class="operator">*</span>b <span class="operator">=</span> createItem(minSize<span class="operator">,</span> prefSize<span class="operator">,</span> maxSize<span class="operator">,</span> <span class="string">"B"</span>); <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span> <span class="operator">*</span>c <span class="operator">=</span> createItem(minSize<span class="operator">,</span> prefSize<span class="operator">,</span> maxSize<span class="operator">,</span> <span class="string">"C"</span>); <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span> <span class="operator">*</span>d <span class="operator">=</span> createItem(minSize<span class="operator">,</span> prefSize<span class="operator">,</span> maxSize<span class="operator">,</span> <span class="string">"D"</span>); <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span> <span class="operator">*</span>e <span class="operator">=</span> createItem(minSize<span class="operator">,</span> prefSize<span class="operator">,</span> maxSize<span class="operator">,</span> <span class="string">"E"</span>); <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span> <span class="operator">*</span>f <span class="operator">=</span> createItem(<span class="type"><a href="../qtcore/qsizef.html">QSizeF</a></span>(<span class="number">30</span><span class="operator">,</span> <span class="number">50</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qsizef.html">QSizeF</a></span>(<span class="number">150</span><span class="operator">,</span> <span class="number">50</span>)<span class="operator">,</span> maxSize<span class="operator">,</span> <span class="string">"F (overflow)"</span>); <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span> <span class="operator">*</span>g <span class="operator">=</span> createItem(<span class="type"><a href="../qtcore/qsizef.html">QSizeF</a></span>(<span class="number">30</span><span class="operator">,</span> <span class="number">50</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qsizef.html">QSizeF</a></span>(<span class="number">30</span><span class="operator">,</span> <span class="number">100</span>)<span class="operator">,</span> maxSize<span class="operator">,</span> <span class="string">"G (overflow)"</span>); <span class="type"><a href="qgraphicsanchorlayout.html">QGraphicsAnchorLayout</a></span> <span class="operator">*</span>l <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgraphicsanchorlayout.html">QGraphicsAnchorLayout</a></span>; l<span class="operator">-</span><span class="operator">></span>setSpacing(<span class="number">0</span>); <span class="type"><a href="qgraphicswidget.html">QGraphicsWidget</a></span> <span class="operator">*</span>w <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgraphicswidget.html">QGraphicsWidget</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Window); w<span class="operator">-</span><span class="operator">></span>setPos(<span class="number">20</span><span class="operator">,</span> <span class="number">20</span>); w<span class="operator">-</span><span class="operator">></span>setLayout(l); <span class="comment">// vertical</span> l<span class="operator">-</span><span class="operator">></span>addAnchor(a<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop<span class="operator">,</span> l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop); l<span class="operator">-</span><span class="operator">></span>addAnchor(b<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop<span class="operator">,</span> l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop); l<span class="operator">-</span><span class="operator">></span>addAnchor(c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop<span class="operator">,</span> a<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom); l<span class="operator">-</span><span class="operator">></span>addAnchor(c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop<span class="operator">,</span> b<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom); l<span class="operator">-</span><span class="operator">></span>addAnchor(c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom<span class="operator">,</span> d<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop); l<span class="operator">-</span><span class="operator">></span>addAnchor(c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom<span class="operator">,</span> e<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop); l<span class="operator">-</span><span class="operator">></span>addAnchor(d<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom<span class="operator">,</span> l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom); l<span class="operator">-</span><span class="operator">></span>addAnchor(e<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom<span class="operator">,</span> l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom); l<span class="operator">-</span><span class="operator">></span>addAnchor(c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop<span class="operator">,</span> f<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop); l<span class="operator">-</span><span class="operator">></span>addAnchor(c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorVerticalCenter<span class="operator">,</span> f<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom); l<span class="operator">-</span><span class="operator">></span>addAnchor(f<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom<span class="operator">,</span> g<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorTop); l<span class="operator">-</span><span class="operator">></span>addAnchor(c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom<span class="operator">,</span> g<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorBottom); <span class="comment">// horizontal</span> l<span class="operator">-</span><span class="operator">></span>addAnchor(l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft<span class="operator">,</span> a<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft); l<span class="operator">-</span><span class="operator">></span>addAnchor(l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft<span class="operator">,</span> d<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft); l<span class="operator">-</span><span class="operator">></span>addAnchor(a<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight<span class="operator">,</span> b<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft); l<span class="operator">-</span><span class="operator">></span>addAnchor(a<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight<span class="operator">,</span> c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft); l<span class="operator">-</span><span class="operator">></span>addAnchor(c<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight<span class="operator">,</span> e<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft); l<span class="operator">-</span><span class="operator">></span>addAnchor(b<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight<span class="operator">,</span> l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight); l<span class="operator">-</span><span class="operator">></span>addAnchor(e<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight<span class="operator">,</span> l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight); l<span class="operator">-</span><span class="operator">></span>addAnchor(d<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight<span class="operator">,</span> e<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft); l<span class="operator">-</span><span class="operator">></span>addAnchor(l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft<span class="operator">,</span> f<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft); l<span class="operator">-</span><span class="operator">></span>addAnchor(l<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft<span class="operator">,</span> g<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorLeft); l<span class="operator">-</span><span class="operator">></span>addAnchor(f<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight<span class="operator">,</span> g<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AnchorRight); scene<span class="operator">.</span>addItem(w); scene<span class="operator">.</span>setBackgroundBrush(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>darkGreen); <span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span> view(<span class="operator">&</span>scene); view<span class="operator">.</span>show(); <span class="keyword">return</span> app<span class="operator">.</span>exec(); } </pre> </div> <!-- @@@graphicsview/anchorlayout/main.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>