338 lines
19 KiB
HTML
338 lines
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<h1 class="title">textfinder.cpp Example File</h1>
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<span class="small-subtitle">uitools/textfinder/textfinder.cpp</span>
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<!-- $$$uitools/textfinder/textfinder.cpp-description -->
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<div class="descr"> <a name="details"></a>
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<pre class="cpp"> <span class="comment">/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/</span>
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<span class="preprocessor">#include <QtUiTools></span>
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<span class="preprocessor">#include <QtGui></span>
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<span class="preprocessor">#include "textfinder.h"</span>
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TextFinder<span class="operator">::</span>TextFinder(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
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: <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)
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{
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<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>formWidget <span class="operator">=</span> loadUiFile();
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ui_findButton <span class="operator">=</span> findChild<span class="operator"><</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">*</span><span class="operator">></span>(<span class="string">"findButton"</span>);
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ui_textEdit <span class="operator">=</span> findChild<span class="operator"><</span><span class="type"><a href="qtextedit.html">QTextEdit</a></span><span class="operator">*</span><span class="operator">></span>(<span class="string">"textEdit"</span>);
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ui_lineEdit <span class="operator">=</span> findChild<span class="operator"><</span><span class="type"><a href="qlineedit.html">QLineEdit</a></span><span class="operator">*</span><span class="operator">></span>(<span class="string">"lineEdit"</span>);
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<span class="type"><a href="qmetaobject.html">QMetaObject</a></span><span class="operator">::</span>connectSlotsByName(<span class="keyword">this</span>);
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loadTextFile();
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<span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>layout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>;
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layout<span class="operator">-</span><span class="operator">></span>addWidget(formWidget);
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setLayout(layout);
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setWindowTitle(tr(<span class="string">"Text Finder"</span>));
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isFirstTime <span class="operator">=</span> <span class="keyword">true</span>;
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}
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<span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">*</span> TextFinder<span class="operator">::</span>loadUiFile()
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{
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<span class="type"><a href="quiloader.html">QUiLoader</a></span> loader;
|
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<span class="type"><a href="qfile.html">QFile</a></span> file(<span class="string">":/forms/textfinder.ui"</span>);
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file<span class="operator">.</span>open(<span class="type"><a href="qfile.html">QFile</a></span><span class="operator">::</span>ReadOnly);
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<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>formWidget <span class="operator">=</span> loader<span class="operator">.</span>load(<span class="operator">&</span>file<span class="operator">,</span> <span class="keyword">this</span>);
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file<span class="operator">.</span>close();
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<span class="keyword">return</span> formWidget;
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}
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<span class="type">void</span> TextFinder<span class="operator">::</span>loadTextFile()
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{
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<span class="type"><a href="qfile.html">QFile</a></span> inputFile(<span class="string">":/forms/input.txt"</span>);
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inputFile<span class="operator">.</span>open(<span class="type"><a href="qiodevice.html">QIODevice</a></span><span class="operator">::</span>ReadOnly);
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<span class="type"><a href="qtextstream.html">QTextStream</a></span> in(<span class="operator">&</span>inputFile);
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<span class="type"><a href="qstring.html">QString</a></span> line <span class="operator">=</span> in<span class="operator">.</span>readAll();
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inputFile<span class="operator">.</span>close();
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ui_textEdit<span class="operator">-</span><span class="operator">></span>append(line);
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ui_textEdit<span class="operator">-</span><span class="operator">></span>setUndoRedoEnabled(<span class="keyword">false</span>);
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ui_textEdit<span class="operator">-</span><span class="operator">></span>setUndoRedoEnabled(<span class="keyword">true</span>);
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}
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<span class="type">void</span> TextFinder<span class="operator">::</span>on_findButton_clicked()
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{
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<span class="type"><a href="qstring.html">QString</a></span> searchString <span class="operator">=</span> ui_lineEdit<span class="operator">-</span><span class="operator">></span>text();
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<span class="type"><a href="qtextdocument.html">QTextDocument</a></span> <span class="operator">*</span>document <span class="operator">=</span> ui_textEdit<span class="operator">-</span><span class="operator">></span>document();
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<span class="type">bool</span> found <span class="operator">=</span> <span class="keyword">false</span>;
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<span class="keyword">if</span> (isFirstTime <span class="operator">=</span><span class="operator">=</span> <span class="keyword">false</span>)
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document<span class="operator">-</span><span class="operator">></span>undo();
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<span class="keyword">if</span> (searchString<span class="operator">.</span>isEmpty()) {
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<span class="type"><a href="qmessagebox.html">QMessageBox</a></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>
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<span class="string">"The search field is empty. Please enter a word and click Find."</span>);
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} <span class="keyword">else</span> {
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<span class="type"><a href="qtextcursor.html">QTextCursor</a></span> highlightCursor(document);
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<span class="type"><a href="qtextcursor.html">QTextCursor</a></span> cursor(document);
|
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|
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cursor<span class="operator">.</span>beginEditBlock();
|
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|
|
<span class="type"><a href="qtextcharformat.html">QTextCharFormat</a></span> plainFormat(highlightCursor<span class="operator">.</span>charFormat());
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|
<span class="type"><a href="qtextcharformat.html">QTextCharFormat</a></span> colorFormat <span class="operator">=</span> plainFormat;
|
|
colorFormat<span class="operator">.</span>setForeground(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>red);
|
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|
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<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"><a href="qtextdocument.html">QTextDocument</a></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"><a href="qtextcursor.html">QTextCursor</a></span><span class="operator">::</span>WordRight<span class="operator">,</span>
|
|
<span class="type"><a href="qtextcursor.html">QTextCursor</a></span><span class="operator">::</span>KeepAnchor);
|
|
highlightCursor<span class="operator">.</span>mergeCharFormat(colorFormat);
|
|
}
|
|
}
|
|
|
|
cursor<span class="operator">.</span>endEditBlock();
|
|
isFirstTime <span class="operator">=</span> <span class="keyword">false</span>;
|
|
|
|
<span class="keyword">if</span> (found <span class="operator">=</span><span class="operator">=</span> <span class="keyword">false</span>) {
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|
<span class="type"><a href="qmessagebox.html">QMessageBox</a></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>
|
|
<span class="string">"Sorry, the word cannot be found."</span>);
|
|
}
|
|
}
|
|
}</pre>
|
|
</div>
|
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<!-- @@@uitools/textfinder/textfinder.cpp -->
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<acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd.
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Documentation contributions included herein are the copyrights of
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their respective owners.</p>
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<br />
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<p>
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The documentation provided herein is licensed under the terms of the
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<a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation
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License version 1.3</a> as published by the Free Software Foundation.</p>
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Documentation sources may be obtained from <a href="http://www.qt-project.org">
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www.qt-project.org</a>.</p>
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<br />
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Qt and respective logos are trademarks of The Qt Company Ltd
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