<?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>chatdialog.cpp Example File | Qt Network 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="qtnetwork-index.html">Qt Network</a></td><td ><a href="qtnetwork-network-chat-example.html">Network Chat Example</a></td><td >chatdialog.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtnetwork-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">chatdialog.cpp Example File</h1> <span class="subtitle">network-chat/chatdialog.cpp</span> <!-- $$$network-chat/chatdialog.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 "chatdialog.h"</span> ChatDialog<span class="operator">::</span>ChatDialog(<span class="type">QWidget</span> <span class="operator">*</span>parent) : <span class="type">QDialog</span>(parent) { setupUi(<span class="keyword">this</span>); lineEdit<span class="operator">-</span><span class="operator">></span>setFocusPolicy(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>StrongFocus); textEdit<span class="operator">-</span><span class="operator">></span>setFocusPolicy(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>NoFocus); textEdit<span class="operator">-</span><span class="operator">></span>setReadOnly(<span class="keyword">true</span>); listWidget<span class="operator">-</span><span class="operator">></span>setFocusPolicy(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>NoFocus); connect(lineEdit<span class="operator">,</span> SIGNAL(returnPressed())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(returnPressed())); connect(lineEdit<span class="operator">,</span> SIGNAL(returnPressed())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(returnPressed())); connect(<span class="operator">&</span>client<span class="operator">,</span> SIGNAL(newMessage(<span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">,</span><span class="type"><a href="../qtcore/qstring.html">QString</a></span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(appendMessage(<span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">,</span><span class="type"><a href="../qtcore/qstring.html">QString</a></span>))); connect(<span class="operator">&</span>client<span class="operator">,</span> SIGNAL(newParticipant(<span class="type"><a href="../qtcore/qstring.html">QString</a></span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(newParticipant(<span class="type"><a href="../qtcore/qstring.html">QString</a></span>))); connect(<span class="operator">&</span>client<span class="operator">,</span> SIGNAL(participantLeft(<span class="type"><a href="../qtcore/qstring.html">QString</a></span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(participantLeft(<span class="type"><a href="../qtcore/qstring.html">QString</a></span>))); myNickName <span class="operator">=</span> client<span class="operator">.</span>nickName(); newParticipant(myNickName); tableFormat<span class="operator">.</span>setBorder(<span class="number">0</span>); <span class="type"><a href="../qtcore/qtimer.html">QTimer</a></span><span class="operator">::</span>singleShot(<span class="number">10</span> <span class="operator">*</span> <span class="number">1000</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(showInformation())); } <span class="type">void</span> ChatDialog<span class="operator">::</span>appendMessage(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>from<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>message) { <span class="keyword">if</span> (from<span class="operator">.</span>isEmpty() <span class="operator">|</span><span class="operator">|</span> message<span class="operator">.</span>isEmpty()) <span class="keyword">return</span>; <span class="type"><a href="../qtgui/qtextcursor.html">QTextCursor</a></span> cursor(textEdit<span class="operator">-</span><span class="operator">></span>textCursor()); cursor<span class="operator">.</span>movePosition(<span class="type"><a href="../qtgui/qtextcursor.html">QTextCursor</a></span><span class="operator">::</span>End); <span class="type"><a href="../qtgui/qtexttable.html">QTextTable</a></span> <span class="operator">*</span>table <span class="operator">=</span> cursor<span class="operator">.</span>insertTable(<span class="number">1</span><span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> tableFormat); table<span class="operator">-</span><span class="operator">></span>cellAt(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span>)<span class="operator">.</span>firstCursorPosition()<span class="operator">.</span>insertText(<span class="char">'<'</span> <span class="operator">+</span> from <span class="operator">+</span> <span class="string">"> "</span>); table<span class="operator">-</span><span class="operator">></span>cellAt(<span class="number">0</span><span class="operator">,</span> <span class="number">1</span>)<span class="operator">.</span>firstCursorPosition()<span class="operator">.</span>insertText(message); <span class="type">QScrollBar</span> <span class="operator">*</span>bar <span class="operator">=</span> textEdit<span class="operator">-</span><span class="operator">></span>verticalScrollBar(); bar<span class="operator">-</span><span class="operator">></span>setValue(bar<span class="operator">-</span><span class="operator">></span>maximum()); } <span class="type">void</span> ChatDialog<span class="operator">::</span>returnPressed() { <span class="type"><a href="../qtcore/qstring.html">QString</a></span> text <span class="operator">=</span> lineEdit<span class="operator">-</span><span class="operator">></span>text(); <span class="keyword">if</span> (text<span class="operator">.</span>isEmpty()) <span class="keyword">return</span>; <span class="keyword">if</span> (text<span class="operator">.</span>startsWith(<span class="type"><a href="../qtcore/qchar.html">QChar</a></span>(<span class="char">'/'</span>))) { <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> color <span class="operator">=</span> textEdit<span class="operator">-</span><span class="operator">></span>textColor(); textEdit<span class="operator">-</span><span class="operator">></span>setTextColor(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>red); textEdit<span class="operator">-</span><span class="operator">></span>append(tr(<span class="string">"! Unknown command: %1"</span>) <span class="operator">.</span>arg(text<span class="operator">.</span>left(text<span class="operator">.</span>indexOf(<span class="char">' '</span>)))); textEdit<span class="operator">-</span><span class="operator">></span>setTextColor(color); } <span class="keyword">else</span> { client<span class="operator">.</span>sendMessage(text); appendMessage(myNickName<span class="operator">,</span> text); } lineEdit<span class="operator">-</span><span class="operator">></span>clear(); } <span class="type">void</span> ChatDialog<span class="operator">::</span>newParticipant(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>nick) { <span class="keyword">if</span> (nick<span class="operator">.</span>isEmpty()) <span class="keyword">return</span>; <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> color <span class="operator">=</span> textEdit<span class="operator">-</span><span class="operator">></span>textColor(); textEdit<span class="operator">-</span><span class="operator">></span>setTextColor(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>gray); textEdit<span class="operator">-</span><span class="operator">></span>append(tr(<span class="string">"* %1 has joined"</span>)<span class="operator">.</span>arg(nick)); textEdit<span class="operator">-</span><span class="operator">></span>setTextColor(color); listWidget<span class="operator">-</span><span class="operator">></span>addItem(nick); } <span class="type">void</span> ChatDialog<span class="operator">::</span>participantLeft(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>nick) { <span class="keyword">if</span> (nick<span class="operator">.</span>isEmpty()) <span class="keyword">return</span>; <span class="type"><a href="../qtcore/qlist.html">QList</a></span><span class="operator"><</span><span class="type">QListWidgetItem</span> <span class="operator">*</span><span class="operator">></span> items <span class="operator">=</span> listWidget<span class="operator">-</span><span class="operator">></span>findItems(nick<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>MatchExactly); <span class="keyword">if</span> (items<span class="operator">.</span>isEmpty()) <span class="keyword">return</span>; <span class="keyword">delete</span> items<span class="operator">.</span>at(<span class="number">0</span>); <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> color <span class="operator">=</span> textEdit<span class="operator">-</span><span class="operator">></span>textColor(); textEdit<span class="operator">-</span><span class="operator">></span>setTextColor(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>gray); textEdit<span class="operator">-</span><span class="operator">></span>append(tr(<span class="string">"* %1 has left"</span>)<span class="operator">.</span>arg(nick)); textEdit<span class="operator">-</span><span class="operator">></span>setTextColor(color); } <span class="type">void</span> ChatDialog<span class="operator">::</span>showInformation() { <span class="keyword">if</span> (listWidget<span class="operator">-</span><span class="operator">></span>count() <span class="operator">=</span><span class="operator">=</span> <span class="number">1</span>) { <span class="type">QMessageBox</span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Chat"</span>)<span class="operator">,</span> tr(<span class="string">"Launch several instances of this "</span> <span class="string">"program on your local network and "</span> <span class="string">"start chatting!"</span>)); } } </pre> </div> <!-- @@@network-chat/chatdialog.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>