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Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <h1 class="title">textedit.cpp Example File</h1> <span class="small-subtitle">tools/customcompleter/textedit.cpp</span> <!-- $$$tools/customcompleter/textedit.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** 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 Digia Plc and its Subsidiary(-ies) 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 "textedit.h"</span> <span class="preprocessor">#include <QCompleter></span> <span class="preprocessor">#include <QKeyEvent></span> <span class="preprocessor">#include <QAbstractItemView></span> <span class="preprocessor">#include <QtDebug></span> <span class="preprocessor">#include <QApplication></span> <span class="preprocessor">#include <QModelIndex></span> <span class="preprocessor">#include <QAbstractItemModel></span> <span class="preprocessor">#include <QScrollBar></span> TextEdit<span class="operator">::</span>TextEdit(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qtextedit.html">QTextEdit</a></span>(parent)<span class="operator">,</span> c(<span class="number">0</span>) { setPlainText(tr(<span class="string">"This TextEdit provides autocompletions for words that have more than"</span> <span class="string">" 3 characters. You can trigger autocompletion using "</span>) <span class="operator">+</span> <span class="type"><a href="qkeysequence.html">QKeySequence</a></span>(<span class="string">"Ctrl+E"</span>)<span class="operator">.</span>toString(<span class="type"><a href="qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>NativeText)); } TextEdit<span class="operator">::</span><span class="operator">~</span>TextEdit() { } <span class="type">void</span> TextEdit<span class="operator">::</span>setCompleter(<span class="type"><a href="qcompleter.html">QCompleter</a></span> <span class="operator">*</span>completer) { <span class="keyword">if</span> (c) <span class="type"><a href="qobject.html">QObject</a></span><span class="operator">::</span>disconnect(c<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="number">0</span>); c <span class="operator">=</span> completer; <span class="keyword">if</span> (<span class="operator">!</span>c) <span class="keyword">return</span>; c<span class="operator">-</span><span class="operator">></span>setWidget(<span class="keyword">this</span>); c<span class="operator">-</span><span class="operator">></span>setCompletionMode(<span class="type"><a href="qcompleter.html">QCompleter</a></span><span class="operator">::</span>PopupCompletion); c<span class="operator">-</span><span class="operator">></span>setCaseSensitivity(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CaseInsensitive); <span class="type"><a href="qobject.html">QObject</a></span><span class="operator">::</span>connect(c<span class="operator">,</span> SIGNAL(activated(<span class="type"><a href="qstring.html">QString</a></span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(insertCompletion(<span class="type"><a href="qstring.html">QString</a></span>))); } <span class="type"><a href="qcompleter.html">QCompleter</a></span> <span class="operator">*</span>TextEdit<span class="operator">::</span>completer() <span class="keyword">const</span> { <span class="keyword">return</span> c; } <span class="type">void</span> TextEdit<span class="operator">::</span>insertCompletion(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span><span class="operator">&</span> completion) { <span class="keyword">if</span> (c<span class="operator">-</span><span class="operator">></span>widget() <span class="operator">!</span><span class="operator">=</span> <span class="keyword">this</span>) <span class="keyword">return</span>; <span class="type"><a href="qtextcursor.html">QTextCursor</a></span> tc <span class="operator">=</span> textCursor(); <span class="type">int</span> extra <span class="operator">=</span> completion<span class="operator">.</span>length() <span class="operator">-</span> c<span class="operator">-</span><span class="operator">></span>completionPrefix()<span class="operator">.</span>length(); tc<span class="operator">.</span>movePosition(<span class="type"><a href="qtextcursor.html">QTextCursor</a></span><span class="operator">::</span>Left); tc<span class="operator">.</span>movePosition(<span class="type"><a href="qtextcursor.html">QTextCursor</a></span><span class="operator">::</span>EndOfWord); tc<span class="operator">.</span>insertText(completion<span class="operator">.</span>right(extra)); setTextCursor(tc); } <span class="type"><a href="qstring.html">QString</a></span> TextEdit<span class="operator">::</span>textUnderCursor() <span class="keyword">const</span> { <span class="type"><a href="qtextcursor.html">QTextCursor</a></span> tc <span class="operator">=</span> textCursor(); tc<span class="operator">.</span>select(<span class="type"><a href="qtextcursor.html">QTextCursor</a></span><span class="operator">::</span>WordUnderCursor); <span class="keyword">return</span> tc<span class="operator">.</span>selectedText(); } <span class="type">void</span> TextEdit<span class="operator">::</span>focusInEvent(<span class="type"><a href="qfocusevent.html">QFocusEvent</a></span> <span class="operator">*</span>e) { <span class="keyword">if</span> (c) c<span class="operator">-</span><span class="operator">></span>setWidget(<span class="keyword">this</span>); <span class="type"><a href="qtextedit.html">QTextEdit</a></span><span class="operator">::</span>focusInEvent(e); } <span class="type">void</span> TextEdit<span class="operator">::</span>keyPressEvent(<span class="type"><a href="qkeyevent.html">QKeyEvent</a></span> <span class="operator">*</span>e) { <span class="keyword">if</span> (c <span class="operator">&</span><span class="operator">&</span> c<span class="operator">-</span><span class="operator">></span>popup()<span class="operator">-</span><span class="operator">></span>isVisible()) { <span class="comment">// The following keys are forwarded by the completer to the widget</span> <span class="keyword">switch</span> (e<span class="operator">-</span><span class="operator">></span>key()) { <span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Enter: <span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Return: <span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Escape: <span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Tab: <span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Backtab: e<span class="operator">-</span><span class="operator">></span>ignore(); <span class="keyword">return</span>; <span class="comment">// let the completer do default behavior</span> <span class="keyword">default</span>: <span class="keyword">break</span>; } } <span class="type">bool</span> isShortcut <span class="operator">=</span> ((e<span class="operator">-</span><span class="operator">></span>modifiers() <span class="operator">&</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ControlModifier) <span class="operator">&</span><span class="operator">&</span> e<span class="operator">-</span><span class="operator">></span>key() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_E); <span class="comment">// CTRL+E</span> <span class="keyword">if</span> (<span class="operator">!</span>c <span class="operator">|</span><span class="operator">|</span> <span class="operator">!</span>isShortcut) <span class="comment">// do not process the shortcut when we have a completer</span> <span class="type"><a href="qtextedit.html">QTextEdit</a></span><span class="operator">::</span>keyPressEvent(e); <span class="keyword">const</span> <span class="type">bool</span> ctrlOrShift <span class="operator">=</span> e<span class="operator">-</span><span class="operator">></span>modifiers() <span class="operator">&</span> (<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ControlModifier <span class="operator">|</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ShiftModifier); <span class="keyword">if</span> (<span class="operator">!</span>c <span class="operator">|</span><span class="operator">|</span> (ctrlOrShift <span class="operator">&</span><span class="operator">&</span> e<span class="operator">-</span><span class="operator">></span>text()<span class="operator">.</span>isEmpty())) <span class="keyword">return</span>; <span class="keyword">static</span> <span class="type"><a href="qstring.html">QString</a></span> eow(<span class="string">"~!@#$%^&*()_+{}|:\"<>?,./;'[]\\-="</span>); <span class="comment">// end of word</span> <span class="type">bool</span> hasModifier <span class="operator">=</span> (e<span class="operator">-</span><span class="operator">></span>modifiers() <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoModifier) <span class="operator">&</span><span class="operator">&</span> <span class="operator">!</span>ctrlOrShift; <span class="type"><a href="qstring.html">QString</a></span> completionPrefix <span class="operator">=</span> textUnderCursor(); <span class="keyword">if</span> (<span class="operator">!</span>isShortcut <span class="operator">&</span><span class="operator">&</span> (hasModifier <span class="operator">|</span><span class="operator">|</span> e<span class="operator">-</span><span class="operator">></span>text()<span class="operator">.</span>isEmpty()<span class="operator">|</span><span class="operator">|</span> completionPrefix<span class="operator">.</span>length() <span class="operator"><</span> <span class="number">3</span> <span class="operator">|</span><span class="operator">|</span> eow<span class="operator">.</span>contains(e<span class="operator">-</span><span class="operator">></span>text()<span class="operator">.</span>right(<span class="number">1</span>)))) { c<span class="operator">-</span><span class="operator">></span>popup()<span class="operator">-</span><span class="operator">></span>hide(); <span class="keyword">return</span>; } <span class="keyword">if</span> (completionPrefix <span class="operator">!</span><span class="operator">=</span> c<span class="operator">-</span><span class="operator">></span>completionPrefix()) { c<span class="operator">-</span><span class="operator">></span>setCompletionPrefix(completionPrefix); c<span class="operator">-</span><span class="operator">></span>popup()<span class="operator">-</span><span class="operator">></span>setCurrentIndex(c<span class="operator">-</span><span class="operator">></span>completionModel()<span class="operator">-</span><span class="operator">></span>index(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span>)); } <span class="type"><a href="qrect.html">QRect</a></span> cr <span class="operator">=</span> cursorRect(); cr<span class="operator">.</span>setWidth(c<span class="operator">-</span><span class="operator">></span>popup()<span class="operator">-</span><span class="operator">></span>sizeHintForColumn(<span class="number">0</span>) <span class="operator">+</span> c<span class="operator">-</span><span class="operator">></span>popup()<span class="operator">-</span><span class="operator">></span>verticalScrollBar()<span class="operator">-</span><span class="operator">></span>sizeHint()<span class="operator">.</span>width()); c<span class="operator">-</span><span class="operator">></span>complete(cr); <span class="comment">// popup it up!</span> }</pre> </div> <!-- @@@tools/customcompleter/textedit.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its subsidiaries. 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