<?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>mimetypemodel.cpp Example File | Qt Core 5.12.2</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="qtcore-index.html">Qt Core</a></td><td ><a href="qtcore-mimetypes-mimetypebrowser-example.html">MIME Type Browser Example</a></td><td >mimetypemodel.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtcore-index.html">Qt 5.12.2 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">mimetypemodel.cpp Example File</h1> <span class="subtitle">mimetypes/mimetypebrowser/mimetypemodel.cpp</span> <!-- $$$mimetypes/mimetypebrowser/mimetypemodel.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2017 The Qt Company Ltd. ** Contact: http://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 "mimetypemodel.h"</span> <span class="preprocessor">#include <QIcon></span> <span class="preprocessor">#include <QDebug></span> <span class="preprocessor">#include <QMimeDatabase></span> <span class="preprocessor">#include <QTextStream></span> <span class="preprocessor">#include <QVariant></span> <span class="preprocessor">#include <algorithm></span> Q_DECLARE_METATYPE(<span class="type"><a href="qmimetype.html">QMimeType</a></span>) <span class="keyword">typedef</span> <span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="../qtgui/qstandarditem.html">QStandardItem</a></span> <span class="operator">*</span><span class="operator">></span> StandardItemList; <span class="keyword">enum</span> { mimeTypeRole <span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>UserRole <span class="operator">+</span> <span class="number">1</span><span class="operator">,</span> iconQueriedRole <span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>UserRole <span class="operator">+</span> <span class="number">2</span> }; bool <span class="keyword">operator</span><span class="operator"><</span>(<span class="keyword">const</span> <span class="type"><a href="qmimetype.html">QMimeType</a></span> <span class="operator">&</span>t1<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qmimetype.html">QMimeType</a></span> <span class="operator">&</span>t2) { <span class="keyword">return</span> t1<span class="operator">.</span>name() <span class="operator"><</span> t2<span class="operator">.</span>name(); } <span class="keyword">static</span> StandardItemList createRow(<span class="keyword">const</span> <span class="type"><a href="qmimetype.html">QMimeType</a></span> <span class="operator">&</span>t) { <span class="keyword">const</span> <span class="type"><a href="qvariant.html">QVariant</a></span> v <span class="operator">=</span> <span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">::</span>fromValue(t); <span class="type"><a href="../qtgui/qstandarditem.html">QStandardItem</a></span> <span class="operator">*</span>nameItem <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtgui/qstandarditem.html">QStandardItem</a></span>(t<span class="operator">.</span>name()); <span class="keyword">const</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ItemFlags flags <span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ItemIsSelectable <span class="operator">|</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ItemIsEnabled; nameItem<span class="operator">-</span><span class="operator">></span>setData(v<span class="operator">,</span> mimeTypeRole); nameItem<span class="operator">-</span><span class="operator">></span>setData(<span class="type"><a href="qvariant.html">QVariant</a></span>(<span class="keyword">false</span>)<span class="operator">,</span> iconQueriedRole); nameItem<span class="operator">-</span><span class="operator">></span>setFlags(flags); nameItem<span class="operator">-</span><span class="operator">></span>setToolTip(t<span class="operator">.</span>comment()); <span class="keyword">return</span> StandardItemList{nameItem}; } MimetypeModel<span class="operator">::</span>MimetypeModel(<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="../qtgui/qstandarditemmodel.html">QStandardItemModel</a></span>(<span class="number">0</span><span class="operator">,</span> ColumnCount<span class="operator">,</span> parent) { setHorizontalHeaderLabels(<span class="type"><a href="qstringlist.html">QStringList</a></span>{tr(<span class="string">"Name"</span>)}); populate(); } <span class="type"><a href="qvariant.html">QVariant</a></span> MimetypeModel<span class="operator">::</span>data(<span class="keyword">const</span> <span class="type"><a href="qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>index<span class="operator">,</span> <span class="type">int</span> role) <span class="keyword">const</span> { <span class="keyword">if</span> (role <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>DecorationRole <span class="operator">|</span><span class="operator">|</span> <span class="operator">!</span>index<span class="operator">.</span>isValid() <span class="operator">|</span><span class="operator">|</span> index<span class="operator">.</span>data(iconQueriedRole)<span class="operator">.</span>toBool()) <span class="keyword">return</span> <span class="type"><a href="../qtgui/qstandarditemmodel.html">QStandardItemModel</a></span><span class="operator">::</span>data(index<span class="operator">,</span> role); <span class="type"><a href="../qtgui/qstandarditem.html">QStandardItem</a></span> <span class="operator">*</span>item <span class="operator">=</span> itemFromIndex(index); <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> iconName <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span>data(mimeTypeRole)<span class="operator">.</span>value<span class="operator"><</span><span class="type"><a href="qmimetype.html">QMimeType</a></span><span class="operator">></span>()<span class="operator">.</span>iconName(); <span class="keyword">if</span> (<span class="operator">!</span>iconName<span class="operator">.</span>isEmpty()) item<span class="operator">-</span><span class="operator">></span>setIcon(<span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>fromTheme(iconName)); item<span class="operator">-</span><span class="operator">></span>setData(<span class="type"><a href="qvariant.html">QVariant</a></span>(<span class="keyword">true</span>)<span class="operator">,</span> iconQueriedRole); <span class="keyword">return</span> item<span class="operator">-</span><span class="operator">></span>icon(); } <span class="type"><a href="qmimetype.html">QMimeType</a></span> MimetypeModel<span class="operator">::</span>mimeType(<span class="keyword">const</span> <span class="type"><a href="qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>index) <span class="keyword">const</span> { <span class="keyword">return</span> index<span class="operator">.</span>data(mimeTypeRole)<span class="operator">.</span>value<span class="operator"><</span><span class="type"><a href="qmimetype.html">QMimeType</a></span><span class="operator">></span>(); } <span class="type">void</span> MimetypeModel<span class="operator">::</span>populate() { <span class="keyword">typedef</span> <span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qmimetype.html">QMimeType</a></span><span class="operator">></span><span class="operator">::</span>Iterator Iterator; <span class="type"><a href="qmimedatabase.html">QMimeDatabase</a></span> mimeDatabase; <span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qmimetype.html">QMimeType</a></span><span class="operator">></span> allTypes <span class="operator">=</span> mimeDatabase<span class="operator">.</span>allMimeTypes(); <span class="comment">// Move top level types to rear end of list, sort this partition,</span> <span class="comment">// create top level items and truncate the list.</span> Iterator end <span class="operator">=</span> allTypes<span class="operator">.</span>end(); <span class="keyword">const</span> Iterator topLevelStart <span class="operator">=</span> std<span class="operator">::</span>stable_partition(allTypes<span class="operator">.</span>begin()<span class="operator">,</span> end<span class="operator">,</span> <span class="operator">[</span><span class="operator">]</span>(<span class="keyword">const</span> <span class="type"><a href="qmimetype.html">QMimeType</a></span> <span class="operator">&</span>t) { <span class="keyword">return</span> <span class="operator">!</span>t<span class="operator">.</span>parentMimeTypes()<span class="operator">.</span>isEmpty(); }); std<span class="operator">::</span>stable_sort(topLevelStart<span class="operator">,</span> end); <span class="keyword">for</span> (Iterator it <span class="operator">=</span> topLevelStart; it <span class="operator">!</span><span class="operator">=</span> end; <span class="operator">+</span><span class="operator">+</span>it) { <span class="keyword">const</span> StandardItemList row <span class="operator">=</span> createRow(<span class="operator">*</span>it); appendRow(row); m_nameIndexHash<span class="operator">.</span>insert(it<span class="operator">-</span><span class="operator">></span>name()<span class="operator">,</span> indexFromItem(row<span class="operator">.</span>constFirst())); } allTypes<span class="operator">.</span>erase(topLevelStart<span class="operator">,</span> end); <span class="keyword">while</span> (<span class="operator">!</span>allTypes<span class="operator">.</span>isEmpty()) { <span class="comment">// Find a type inheriting one that is already in the model.</span> end <span class="operator">=</span> allTypes<span class="operator">.</span>end(); <span class="keyword">auto</span> nameIndexIt <span class="operator">=</span> m_nameIndexHash<span class="operator">.</span>constEnd(); <span class="keyword">for</span> (Iterator it <span class="operator">=</span> allTypes<span class="operator">.</span>begin(); it <span class="operator">!</span><span class="operator">=</span> end; <span class="operator">+</span><span class="operator">+</span>it) { nameIndexIt <span class="operator">=</span> m_nameIndexHash<span class="operator">.</span>constFind(it<span class="operator">-</span><span class="operator">></span>parentMimeTypes()<span class="operator">.</span>constFirst()); <span class="keyword">if</span> (nameIndexIt <span class="operator">!</span><span class="operator">=</span> m_nameIndexHash<span class="operator">.</span>constEnd()) <span class="keyword">break</span>; } <span class="keyword">if</span> (nameIndexIt <span class="operator">=</span><span class="operator">=</span> m_nameIndexHash<span class="operator">.</span>constEnd()) { <a href="qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"Orphaned mime types:"</span> <span class="operator"><</span><span class="operator"><</span> allTypes; <span class="keyword">break</span>; } <span class="comment">// Move types inheriting the parent type to rear end of list, sort this partition,</span> <span class="comment">// append the items to parent and truncate the list.</span> <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>parentName <span class="operator">=</span> nameIndexIt<span class="operator">.</span>key(); <span class="keyword">const</span> Iterator start <span class="operator">=</span> std<span class="operator">::</span>stable_partition(allTypes<span class="operator">.</span>begin()<span class="operator">,</span> end<span class="operator">,</span> <span class="operator">[</span>parentName<span class="operator">]</span>(<span class="keyword">const</span> <span class="type"><a href="qmimetype.html">QMimeType</a></span> <span class="operator">&</span>t) { <span class="keyword">return</span> <span class="operator">!</span>t<span class="operator">.</span>parentMimeTypes()<span class="operator">.</span>contains(parentName); }); std<span class="operator">::</span>stable_sort(start<span class="operator">,</span> end); <span class="type"><a href="../qtgui/qstandarditem.html">QStandardItem</a></span> <span class="operator">*</span>parentItem <span class="operator">=</span> itemFromIndex(nameIndexIt<span class="operator">.</span>value()); <span class="keyword">for</span> (Iterator it <span class="operator">=</span> start; it <span class="operator">!</span><span class="operator">=</span> end; <span class="operator">+</span><span class="operator">+</span>it) { <span class="keyword">const</span> StandardItemList row <span class="operator">=</span> createRow(<span class="operator">*</span>it); parentItem<span class="operator">-</span><span class="operator">></span>appendRow(row); m_nameIndexHash<span class="operator">.</span>insert(it<span class="operator">-</span><span class="operator">></span>name()<span class="operator">,</span> indexFromItem(row<span class="operator">.</span>constFirst())); } allTypes<span class="operator">.</span>erase(start<span class="operator">,</span> end); } } <span class="type"><a href="qtextstream.html">QTextStream</a></span> <span class="operator">&</span><span class="keyword">operator</span><span class="operator"><</span><span class="operator"><</span>(<span class="type"><a href="qtextstream.html">QTextStream</a></span> <span class="operator">&</span>stream<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstringlist.html">QStringList</a></span> <span class="operator">&</span>list) { <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span><span class="operator">,</span> size <span class="operator">=</span> list<span class="operator">.</span>size(); i <span class="operator"><</span> size; <span class="operator">+</span><span class="operator">+</span>i) { <span class="keyword">if</span> (i) stream <span class="operator"><</span><span class="operator"><</span> <span class="string">", "</span>; stream <span class="operator"><</span><span class="operator"><</span> list<span class="operator">.</span>at(i); } <span class="keyword">return</span> stream; } <span class="type"><a href="qstring.html">QString</a></span> MimetypeModel<span class="operator">::</span>formatMimeTypeInfo(<span class="keyword">const</span> <span class="type"><a href="qmimetype.html">QMimeType</a></span> <span class="operator">&</span>t) { <span class="type"><a href="qstring.html">QString</a></span> result; <span class="type"><a href="qtextstream.html">QTextStream</a></span> str(<span class="operator">&</span>result); str <span class="operator"><</span><span class="operator"><</span> <span class="string">"<html><head/><body><h3><center>"</span> <span class="operator"><</span><span class="operator"><</span> t<span class="operator">.</span>name() <span class="operator"><</span><span class="operator"><</span> <span class="string">"</center></h3><br><table>"</span>; <span class="keyword">const</span> <span class="type"><a href="qstringlist.html">QStringList</a></span> <span class="operator">&</span>aliases <span class="operator">=</span> t<span class="operator">.</span>aliases(); <span class="keyword">if</span> (<span class="operator">!</span>aliases<span class="operator">.</span>isEmpty()) str <span class="operator"><</span><span class="operator"><</span> <span class="string">"<tr><td>Aliases:</td><td>"</span> <span class="operator"><</span><span class="operator"><</span> <span class="string">" ("</span> <span class="operator"><</span><span class="operator"><</span> aliases <span class="operator"><</span><span class="operator"><</span> <span class="char">')'</span>; str <span class="operator"><</span><span class="operator"><</span> <span class="string">"</td></tr>"</span> <span class="operator"><</span><span class="operator"><</span> <span class="string">"<tr><td>Comment:</td><td>"</span> <span class="operator"><</span><span class="operator"><</span> t<span class="operator">.</span>comment() <span class="operator"><</span><span class="operator"><</span> <span class="string">"</td></tr>"</span> <span class="operator"><</span><span class="operator"><</span> <span class="string">"<tr><td>Icon name:</td><td>"</span> <span class="operator"><</span><span class="operator"><</span> t<span class="operator">.</span>iconName() <span class="operator"><</span><span class="operator"><</span> <span class="string">"</td></tr>"</span> <span class="operator"><</span><span class="operator"><</span> <span class="string">"<tr><td>Generic icon name</td><td>"</span> <span class="operator"><</span><span class="operator"><</span> t<span class="operator">.</span>genericIconName() <span class="operator"><</span><span class="operator"><</span> <span class="string">"</td></tr>"</span>; <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>filter <span class="operator">=</span> t<span class="operator">.</span>filterString(); <span class="keyword">if</span> (<span class="operator">!</span>filter<span class="operator">.</span>isEmpty()) str <span class="operator"><</span><span class="operator"><</span> <span class="string">"<tr><td>Filter:</td><td>"</span> <span class="operator"><</span><span class="operator"><</span> t<span class="operator">.</span>filterString() <span class="operator"><</span><span class="operator"><</span> <span class="string">"</td></tr>"</span>; <span class="keyword">const</span> <span class="type"><a href="qstringlist.html">QStringList</a></span> <span class="operator">&</span>patterns <span class="operator">=</span> t<span class="operator">.</span>globPatterns(); <span class="keyword">if</span> (<span class="operator">!</span>patterns<span class="operator">.</span>isEmpty()) str <span class="operator"><</span><span class="operator"><</span> <span class="string">"<tr><td>Glob patterns:</td><td>"</span> <span class="operator"><</span><span class="operator"><</span> patterns <span class="operator"><</span><span class="operator"><</span> <span class="string">"</td></tr>"</span>; <span class="keyword">const</span> <span class="type"><a href="qstringlist.html">QStringList</a></span> <span class="operator">&</span>parentMimeTypes <span class="operator">=</span> t<span class="operator">.</span>parentMimeTypes(); <span class="keyword">if</span> (<span class="operator">!</span>parentMimeTypes<span class="operator">.</span>isEmpty()) str <span class="operator"><</span><span class="operator"><</span> <span class="string">"<tr><td>Parent types:</td><td>"</span> <span class="operator"><</span><span class="operator"><</span> t<span class="operator">.</span>parentMimeTypes() <span class="operator"><</span><span class="operator"><</span> <span class="string">"</td></tr>"</span>; <span class="type"><a href="qstringlist.html">QStringList</a></span> suffixes <span class="operator">=</span> t<span class="operator">.</span>suffixes(); <span class="keyword">if</span> (<span class="operator">!</span>suffixes<span class="operator">.</span>isEmpty()) { str <span class="operator"><</span><span class="operator"><</span> <span class="string">"<tr><td>Suffixes:</td><td>"</span>; <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>preferredSuffix <span class="operator">=</span> t<span class="operator">.</span>preferredSuffix(); <span class="keyword">if</span> (<span class="operator">!</span>preferredSuffix<span class="operator">.</span>isEmpty()) { suffixes<span class="operator">.</span>removeOne(preferredSuffix); str <span class="operator"><</span><span class="operator"><</span> <span class="string">"<b>"</span> <span class="operator"><</span><span class="operator"><</span> preferredSuffix <span class="operator"><</span><span class="operator"><</span> <span class="string">"</b> "</span>; } str <span class="operator"><</span><span class="operator"><</span> suffixes <span class="operator"><</span><span class="operator"><</span> <span class="string">"</td></tr>"</span>; } str <span class="operator"><</span><span class="operator"><</span> <span class="string">"</table></body></html>"</span>; <span class="keyword">return</span> result; } </pre> </div> <!-- @@@mimetypes/mimetypebrowser/mimetypemodel.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>