<?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>textfinder.cpp Example File | Qt UI Tools 5.9</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 5.9</td><td ><a href="qtuitools-index.html">Qt UI Tools</a></td><td ><a href="qtuitools-textfinder-example.html">Text Finder Example</a></td><td >textfinder.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</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">textfinder.cpp Example File</h1> <span class="subtitle">textfinder/textfinder.cpp</span> <!-- $$$textfinder/textfinder.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2017 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 "textfinder.h"</span> <span class="preprocessor">#include <QFile></span> <span class="preprocessor">#include <QLineEdit></span> <span class="preprocessor">#include <QMessageBox></span> <span class="preprocessor">#include <QPushButton></span> <span class="preprocessor">#include <QTextEdit></span> <span class="preprocessor">#include <QTextStream></span> <span class="preprocessor">#include <QUiLoader></span> <span class="preprocessor">#include <QVBoxLayout></span> <span class="keyword">static</span> <span class="type">QWidget</span> <span class="operator">*</span>loadUiFile(<span class="type">QWidget</span> <span class="operator">*</span>parent) { <span class="type">QFile</span> file(<span class="string">":/forms/textfinder.ui"</span>); file<span class="operator">.</span>open(<span class="type">QIODevice</span><span class="operator">::</span>ReadOnly); <span class="type"><a href="quiloader.html">QUiLoader</a></span> loader; <span class="keyword">return</span> loader<span class="operator">.</span>load(<span class="operator">&</span>file<span class="operator">,</span> parent); } <span class="keyword">static</span> <span class="type">QString</span> loadTextFile() { <span class="type">QFile</span> inputFile(<span class="string">":/forms/input.txt"</span>); inputFile<span class="operator">.</span>open(<span class="type">QIODevice</span><span class="operator">::</span>ReadOnly); <span class="type">QTextStream</span> in(<span class="operator">&</span>inputFile); in<span class="operator">.</span>setCodec(<span class="string">"UTF-8"</span>); <span class="keyword">return</span> in<span class="operator">.</span>readAll(); } TextFinder<span class="operator">::</span>TextFinder(<span class="type">QWidget</span> <span class="operator">*</span>parent) : <span class="type">QWidget</span>(parent) { <span class="type">QWidget</span> <span class="operator">*</span>formWidget <span class="operator">=</span> loadUiFile(<span class="keyword">this</span>); ui_findButton <span class="operator">=</span> findChild<span class="operator"><</span><span class="type">QPushButton</span><span class="operator">*</span><span class="operator">></span>(<span class="string">"findButton"</span>); ui_textEdit <span class="operator">=</span> findChild<span class="operator"><</span><span class="type">QTextEdit</span><span class="operator">*</span><span class="operator">></span>(<span class="string">"textEdit"</span>); ui_lineEdit <span class="operator">=</span> findChild<span class="operator"><</span><span class="type">QLineEdit</span><span class="operator">*</span><span class="operator">></span>(<span class="string">"lineEdit"</span>); <span class="type">QMetaObject</span><span class="operator">::</span>connectSlotsByName(<span class="keyword">this</span>); ui_textEdit<span class="operator">-</span><span class="operator">></span>setText(loadTextFile()); <span class="type">QVBoxLayout</span> <span class="operator">*</span>layout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QVBoxLayout</span>; layout<span class="operator">-</span><span class="operator">></span>addWidget(formWidget); setLayout(layout); setWindowTitle(tr(<span class="string">"Text Finder"</span>)); } <span class="type">void</span> TextFinder<span class="operator">::</span>on_findButton_clicked() { <span class="type">QString</span> searchString <span class="operator">=</span> ui_lineEdit<span class="operator">-</span><span class="operator">></span>text(); <span class="type">QTextDocument</span> <span class="operator">*</span>document <span class="operator">=</span> ui_textEdit<span class="operator">-</span><span class="operator">></span>document(); bool found <span class="operator">=</span> <span class="keyword">false</span>; <span class="comment">// undo previous change (if any)</span> document<span class="operator">-</span><span class="operator">></span>undo(); <span class="keyword">if</span> (searchString<span class="operator">.</span>isEmpty()) { <span class="type">QMessageBox</span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Empty Search Field"</span>)<span class="operator">,</span> tr(<span class="string">"The search field is empty. "</span> <span class="string">"Please enter a word and click Find."</span>)); } <span class="keyword">else</span> { <span class="type">QTextCursor</span> highlightCursor(document); <span class="type">QTextCursor</span> cursor(document); cursor<span class="operator">.</span>beginEditBlock(); <span class="type">QTextCharFormat</span> plainFormat(highlightCursor<span class="operator">.</span>charFormat()); <span class="type">QTextCharFormat</span> colorFormat <span class="operator">=</span> plainFormat; colorFormat<span class="operator">.</span>setForeground(<span class="type">Qt</span><span class="operator">::</span>red); <span class="keyword">while</span> (<span class="operator">!</span>highlightCursor<span class="operator">.</span>isNull() <span class="operator">&</span><span class="operator">&</span> <span class="operator">!</span>highlightCursor<span class="operator">.</span>atEnd()) { highlightCursor <span class="operator">=</span> document<span class="operator">-</span><span class="operator">></span>find(searchString<span class="operator">,</span> highlightCursor<span class="operator">,</span> <span class="type">QTextDocument</span><span class="operator">::</span>FindWholeWords); <span class="keyword">if</span> (<span class="operator">!</span>highlightCursor<span class="operator">.</span>isNull()) { found <span class="operator">=</span> <span class="keyword">true</span>; highlightCursor<span class="operator">.</span>movePosition(<span class="type">QTextCursor</span><span class="operator">::</span>WordRight<span class="operator">,</span> <span class="type">QTextCursor</span><span class="operator">::</span>KeepAnchor); highlightCursor<span class="operator">.</span>mergeCharFormat(colorFormat); } } cursor<span class="operator">.</span>endEditBlock(); <span class="keyword">if</span> (found <span class="operator">=</span><span class="operator">=</span> <span class="keyword">false</span>) { <span class="type">QMessageBox</span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Word Not Found"</span>)<span class="operator">,</span> tr(<span class="string">"Sorry, the word cannot be found."</span>)); } } } </pre> </div> <!-- @@@textfinder/textfinder.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2017 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>