<?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 5.12.6</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="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-mainwindows-mainwindow-example.html">Main Window</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 5.12.6 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">main.cpp Example File</h1> <span class="subtitle">mainwindows/mainwindow/main.cpp</span> <!-- $$$mainwindows/mainwindow/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 demonstration applications 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 "mainwindow.h"</span> <span class="preprocessor">#include <QApplication></span> <span class="preprocessor">#include <QPainterPath></span> <span class="preprocessor">#include <QPainter></span> <span class="preprocessor">#include <QMap></span> <span class="preprocessor">#include <QDebug></span> <span class="type">void</span> render_qt_text(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> <span class="operator">*</span>painter<span class="operator">,</span> <span class="type">int</span> w<span class="operator">,</span> <span class="type">int</span> h<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> <span class="operator">&</span>color) { <span class="type"><a href="../qtgui/qpainterpath.html">QPainterPath</a></span> path; path<span class="operator">.</span>moveTo(<span class="operator">-</span><span class="number">0.083695</span><span class="operator">,</span> <span class="number">0.283849</span>); path<span class="operator">.</span>cubicTo(<span class="operator">-</span><span class="number">0.049581</span><span class="operator">,</span> <span class="number">0.349613</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.012720</span><span class="operator">,</span> <span class="number">0.397969</span><span class="operator">,</span> <span class="number">0.026886</span><span class="operator">,</span> <span class="number">0.428917</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.066493</span><span class="operator">,</span> <span class="number">0.459865</span><span class="operator">,</span> <span class="number">0.111593</span><span class="operator">,</span> <span class="number">0.477595</span><span class="operator">,</span> <span class="number">0.162186</span><span class="operator">,</span> <span class="number">0.482108</span>); path<span class="operator">.</span>lineTo(<span class="number">0.162186</span><span class="operator">,</span> <span class="number">0.500000</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.115929</span><span class="operator">,</span> <span class="number">0.498066</span><span class="operator">,</span> <span class="number">0.066565</span><span class="operator">,</span> <span class="number">0.487669</span><span class="operator">,</span> <span class="number">0.014094</span><span class="operator">,</span> <span class="number">0.468810</span>); path<span class="operator">.</span>cubicTo(<span class="operator">-</span><span class="number">0.038378</span><span class="operator">,</span> <span class="number">0.449952</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.088103</span><span class="operator">,</span> <span class="number">0.423839</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.135082</span><span class="operator">,</span> <span class="number">0.390474</span>); path<span class="operator">.</span>cubicTo(<span class="operator">-</span><span class="number">0.182061</span><span class="operator">,</span> <span class="number">0.357108</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.222608</span><span class="operator">,</span> <span class="number">0.321567</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.256722</span><span class="operator">,</span> <span class="number">0.283849</span>); path<span class="operator">.</span>cubicTo(<span class="operator">-</span><span class="number">0.304712</span><span class="operator">,</span> <span class="number">0.262250</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.342874</span><span class="operator">,</span> <span class="number">0.239362</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.371206</span><span class="operator">,</span> <span class="number">0.215184</span>); path<span class="operator">.</span>cubicTo(<span class="operator">-</span><span class="number">0.411969</span><span class="operator">,</span> <span class="number">0.179078</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.443625</span><span class="operator">,</span> <span class="number">0.134671</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.466175</span><span class="operator">,</span> <span class="number">0.081963</span>); path<span class="operator">.</span>cubicTo(<span class="operator">-</span><span class="number">0.488725</span><span class="operator">,</span> <span class="number">0.029255</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.500000</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.033043</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.500000</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.104932</span>); path<span class="operator">.</span>cubicTo(<span class="operator">-</span><span class="number">0.500000</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.218407</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.467042</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.312621</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.401127</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.387573</span>); path<span class="operator">.</span>cubicTo(<span class="operator">-</span><span class="number">0.335212</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.462524</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.255421</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.500000</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.161752</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.500000</span>); path<span class="operator">.</span>cubicTo(<span class="operator">-</span><span class="number">0.072998</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.500000</span><span class="operator">,</span> <span class="number">0.003903</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.462444</span><span class="operator">,</span> <span class="number">0.068951</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.387331</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.133998</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.312218</span><span class="operator">,</span> <span class="number">0.166522</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.217440</span><span class="operator">,</span> <span class="number">0.166522</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.102998</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.166522</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.010155</span><span class="operator">,</span> <span class="number">0.143394</span><span class="operator">,</span> <span class="number">0.071325</span><span class="operator">,</span> <span class="number">0.097138</span><span class="operator">,</span> <span class="number">0.141441</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.050882</span><span class="operator">,</span> <span class="number">0.211557</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.009396</span><span class="operator">,</span> <span class="number">0.259026</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.083695</span><span class="operator">,</span> <span class="number">0.283849</span>); path<span class="operator">.</span>moveTo(<span class="operator">-</span><span class="number">0.167823</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.456963</span>); path<span class="operator">.</span>cubicTo(<span class="operator">-</span><span class="number">0.228823</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.456963</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.277826</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.432624</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.314831</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.383946</span>); path<span class="operator">.</span>cubicTo(<span class="operator">-</span><span class="number">0.361665</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.323340</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.385082</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.230335</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.385082</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.104932</span>); path<span class="operator">.</span>cubicTo(<span class="operator">-</span><span class="number">0.385082</span><span class="operator">,</span> <span class="number">0.017569</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.361376</span><span class="operator">,</span> <span class="number">0.112025</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.313964</span><span class="operator">,</span> <span class="number">0.178433</span>); path<span class="operator">.</span>cubicTo(<span class="operator">-</span><span class="number">0.277248</span><span class="operator">,</span> <span class="number">0.229368</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.228534</span><span class="operator">,</span> <span class="number">0.254836</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.167823</span><span class="operator">,</span> <span class="number">0.254836</span>); path<span class="operator">.</span>cubicTo(<span class="operator">-</span><span class="number">0.105088</span><span class="operator">,</span> <span class="number">0.254836</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.054496</span><span class="operator">,</span> <span class="number">0.229368</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.016045</span><span class="operator">,</span> <span class="number">0.178433</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.029055</span><span class="operator">,</span> <span class="number">0.117827</span><span class="operator">,</span> <span class="number">0.051605</span><span class="operator">,</span> <span class="number">0.028691</span><span class="operator">,</span> <span class="number">0.051605</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.088975</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.051605</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.179562</span><span class="operator">,</span> <span class="number">0.039318</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.255803</span><span class="operator">,</span> <span class="number">0.014744</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.317698</span>); path<span class="operator">.</span>cubicTo(<span class="operator">-</span><span class="number">0.004337</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.365409</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.029705</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.400548</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.061362</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.423114</span>); path<span class="operator">.</span>cubicTo(<span class="operator">-</span><span class="number">0.093018</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.445680</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.128505</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.456963</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.167823</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.456963</span>); path<span class="operator">.</span>moveTo(<span class="number">0.379011</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.404739</span>); path<span class="operator">.</span>lineTo(<span class="number">0.379011</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.236460</span>); path<span class="operator">.</span>lineTo(<span class="number">0.486123</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.236460</span>); path<span class="operator">.</span>lineTo(<span class="number">0.486123</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.197292</span>); path<span class="operator">.</span>lineTo(<span class="number">0.379011</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.197292</span>); path<span class="operator">.</span>lineTo(<span class="number">0.379011</span><span class="operator">,</span> <span class="number">0.134913</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.379011</span><span class="operator">,</span> <span class="number">0.168117</span><span class="operator">,</span> <span class="number">0.383276</span><span class="operator">,</span> <span class="number">0.190442</span><span class="operator">,</span> <span class="number">0.391804</span><span class="operator">,</span> <span class="number">0.201886</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.400332</span><span class="operator">,</span> <span class="number">0.213330</span><span class="operator">,</span> <span class="number">0.411246</span><span class="operator">,</span> <span class="number">0.219052</span><span class="operator">,</span> <span class="number">0.424545</span><span class="operator">,</span> <span class="number">0.219052</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.435531</span><span class="operator">,</span> <span class="number">0.219052</span><span class="operator">,</span> <span class="number">0.446227</span><span class="operator">,</span> <span class="number">0.215264</span><span class="operator">,</span> <span class="number">0.456635</span><span class="operator">,</span> <span class="number">0.207689</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.467042</span><span class="operator">,</span> <span class="number">0.200113</span><span class="operator">,</span> <span class="number">0.474993</span><span class="operator">,</span> <span class="number">0.188910</span><span class="operator">,</span> <span class="number">0.480486</span><span class="operator">,</span> <span class="number">0.174081</span>); path<span class="operator">.</span>lineTo(<span class="number">0.500000</span><span class="operator">,</span> <span class="number">0.174081</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.488436</span><span class="operator">,</span> <span class="number">0.210509</span><span class="operator">,</span> <span class="number">0.471957</span><span class="operator">,</span> <span class="number">0.237911</span><span class="operator">,</span> <span class="number">0.450564</span><span class="operator">,</span> <span class="number">0.256286</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.429170</span><span class="operator">,</span> <span class="number">0.274662</span><span class="operator">,</span> <span class="number">0.407054</span><span class="operator">,</span> <span class="number">0.283849</span><span class="operator">,</span> <span class="number">0.384215</span><span class="operator">,</span> <span class="number">0.283849</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.368893</span><span class="operator">,</span> <span class="number">0.283849</span><span class="operator">,</span> <span class="number">0.353859</span><span class="operator">,</span> <span class="number">0.279094</span><span class="operator">,</span> <span class="number">0.339115</span><span class="operator">,</span> <span class="number">0.269584</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.324371</span><span class="operator">,</span> <span class="number">0.260074</span><span class="operator">,</span> <span class="number">0.313530</span><span class="operator">,</span> <span class="number">0.246534</span><span class="operator">,</span> <span class="number">0.306592</span><span class="operator">,</span> <span class="number">0.228965</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.299653</span><span class="operator">,</span> <span class="number">0.211396</span><span class="operator">,</span> <span class="number">0.296184</span><span class="operator">,</span> <span class="number">0.184075</span><span class="operator">,</span> <span class="number">0.296184</span><span class="operator">,</span> <span class="number">0.147002</span>); path<span class="operator">.</span>lineTo(<span class="number">0.296184</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.197292</span>); path<span class="operator">.</span>lineTo(<span class="number">0.223330</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.197292</span>); path<span class="operator">.</span>lineTo(<span class="number">0.223330</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.215667</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.241833</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.224049</span><span class="operator">,</span> <span class="number">0.260697</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.237992</span><span class="operator">,</span> <span class="number">0.279922</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.257495</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.299147</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.276999</span><span class="operator">,</span> <span class="number">0.316276</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.300129</span><span class="operator">,</span> <span class="number">0.331310</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.326886</span>); path<span class="operator">.</span>cubicTo(<span class="number">0.338826</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.341070</span><span class="operator">,</span> <span class="number">0.349523</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.367021</span><span class="operator">,</span> <span class="number">0.363400</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.404739</span>); path<span class="operator">.</span>lineTo(<span class="number">0.379011</span><span class="operator">,</span> <span class="operator">-</span><span class="number">0.404739</span>); path<span class="operator">.</span>moveTo(<span class="operator">-</span><span class="number">0.535993</span><span class="operator">,</span> <span class="number">0.275629</span>); painter<span class="operator">-</span><span class="operator">></span>translate(w <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> h <span class="operator">/</span> <span class="number">2</span>); <span class="type">double</span> scale <span class="operator">=</span> <a href="../qtcore/qtglobal.html#qMin">qMin</a>(w<span class="operator">,</span> h) <span class="operator">*</span> <span class="number">8</span> <span class="operator">/</span> <span class="number">10.0</span>; painter<span class="operator">-</span><span class="operator">></span>scale(scale<span class="operator">,</span> scale); painter<span class="operator">-</span><span class="operator">></span>setRenderHint(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing); painter<span class="operator">-</span><span class="operator">></span>save(); painter<span class="operator">-</span><span class="operator">></span>translate(<span class="operator">.</span><span class="number">1</span><span class="operator">,</span> <span class="operator">.</span><span class="number">1</span>); painter<span class="operator">-</span><span class="operator">></span>fillPath(path<span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<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> <span class="number">63</span>)); painter<span class="operator">-</span><span class="operator">></span>restore(); painter<span class="operator">-</span><span class="operator">></span>setBrush(color); painter<span class="operator">-</span><span class="operator">></span>setPen(<span class="type"><a href="../qtgui/qpen.html">QPen</a></span>(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>black<span class="operator">,</span> <span class="number">0.02</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>SolidLine<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>FlatCap<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>RoundJoin)); painter<span class="operator">-</span><span class="operator">></span>drawPath(path); } <span class="keyword">static</span> <span class="type">void</span> usage() { <a href="../qtcore/qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"Usage: mainwindow [-SizeHint<color> <width>x<height>] ..."</span>; exit(<span class="number">1</span>); } <span class="keyword">enum</span> ParseCommandLineArgumentsResult { CommandLineArgumentsOk<span class="operator">,</span> CommandLineArgumentsError<span class="operator">,</span> HelpRequested }; <span class="keyword">static</span> ParseCommandLineArgumentsResult parseCustomSizeHints(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> <span class="operator">&</span>arguments<span class="operator">,</span> MainWindow<span class="operator">::</span>CustomSizeHintMap <span class="operator">*</span>result) { result<span class="operator">-</span><span class="operator">></span>clear(); <span class="keyword">const</span> <span class="type">int</span> argumentCount <span class="operator">=</span> arguments<span class="operator">.</span>size(); <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">1</span>; i <span class="operator"><</span> argumentCount; <span class="operator">+</span><span class="operator">+</span>i) { <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>arg <span class="operator">=</span> arguments<span class="operator">.</span>at(i); <span class="keyword">if</span> (arg<span class="operator">.</span>startsWith(QLatin1String(<span class="string">"-SizeHint"</span>))) { <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> name <span class="operator">=</span> arg<span class="operator">.</span>mid(<span class="number">9</span>); <span class="keyword">if</span> (name<span class="operator">.</span>isEmpty()) <span class="keyword">return</span> CommandLineArgumentsError; <span class="keyword">if</span> (<span class="operator">+</span><span class="operator">+</span>i <span class="operator">=</span><span class="operator">=</span> argumentCount) <span class="keyword">return</span> CommandLineArgumentsError; <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> sizeStr <span class="operator">=</span> arguments<span class="operator">.</span>at(i); <span class="keyword">const</span> <span class="type">int</span> idx <span class="operator">=</span> sizeStr<span class="operator">.</span>indexOf(QLatin1Char(<span class="char">'x'</span>)); <span class="keyword">if</span> (idx <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) <span class="keyword">return</span> CommandLineArgumentsError; bool ok; <span class="keyword">const</span> <span class="type">int</span> w <span class="operator">=</span> sizeStr<span class="operator">.</span>leftRef(idx)<span class="operator">.</span>toInt(<span class="operator">&</span>ok); <span class="keyword">if</span> (<span class="operator">!</span>ok) <span class="keyword">return</span> CommandLineArgumentsError; <span class="keyword">const</span> <span class="type">int</span> h <span class="operator">=</span> sizeStr<span class="operator">.</span>midRef(idx <span class="operator">+</span> <span class="number">1</span>)<span class="operator">.</span>toInt(<span class="operator">&</span>ok); <span class="keyword">if</span> (<span class="operator">!</span>ok) <span class="keyword">return</span> CommandLineArgumentsError; result<span class="operator">-</span><span class="operator">></span>insert(name<span class="operator">,</span> <span class="type"><a href="../qtcore/qsize.html">QSize</a></span>(w<span class="operator">,</span> h)); } <span class="keyword">else</span> <span class="keyword">if</span> (arg <span class="operator">=</span><span class="operator">=</span> QLatin1String(<span class="string">"-h"</span>) <span class="operator">|</span><span class="operator">|</span> arg <span class="operator">=</span><span class="operator">=</span> QLatin1String(<span class="string">"--help"</span>)) { <span class="keyword">return</span> HelpRequested; } <span class="keyword">else</span> { <span class="keyword">return</span> CommandLineArgumentsError; } } <span class="keyword">return</span> CommandLineArgumentsOk; } <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><span class="operator">::</span>setAttribute(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AA_EnableHighDpiScaling); <span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>setAttribute(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AA_UseHighDpiPixmaps); <span class="type"><a href="qapplication.html">QApplication</a></span> app(argc<span class="operator">,</span> argv); MainWindow<span class="operator">::</span>CustomSizeHintMap customSizeHints; <span class="keyword">switch</span> (parseCustomSizeHints(<span class="type"><a href="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>arguments()<span class="operator">,</span> <span class="operator">&</span>customSizeHints)) { <span class="keyword">case</span> CommandLineArgumentsOk: <span class="keyword">break</span>; <span class="keyword">case</span> CommandLineArgumentsError: usage(); <span class="keyword">return</span> <span class="operator">-</span><span class="number">1</span>; <span class="keyword">case</span> HelpRequested: usage(); <span class="keyword">return</span> <span class="number">0</span>; } MainWindow mainWin(customSizeHints); mainWin<span class="operator">.</span>resize(<span class="number">800</span><span class="operator">,</span> <span class="number">600</span>); mainWin<span class="operator">.</span>show(); <span class="keyword">return</span> app<span class="operator">.</span>exec(); } </pre> </div> <!-- @@@mainwindows/mainwindow/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>