<?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>treeitem.cpp Example File | Qt Widgets 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="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-itemviews-editabletreemodel-example.html">Editable Tree Model Example</a></td><td >treeitem.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">treeitem.cpp Example File</h1> <span class="subtitle">itemviews/editabletreemodel/treeitem.cpp</span> <!-- $$$itemviews/editabletreemodel/treeitem.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="comment">/* treeitem.cpp A container for items of data supplied by the simple tree model. */</span> <span class="preprocessor">#include "treeitem.h"</span> <span class="preprocessor">#include <QStringList></span> TreeItem<span class="operator">::</span>TreeItem(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qvector.html">QVector</a></span><span class="operator"><</span><span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span><span class="operator">></span> <span class="operator">&</span>data<span class="operator">,</span> TreeItem <span class="operator">*</span>parent) { parentItem <span class="operator">=</span> parent; itemData <span class="operator">=</span> data; } TreeItem<span class="operator">::</span><span class="operator">~</span>TreeItem() { <a href="../qtcore/qtalgorithms.html#qDeleteAll">qDeleteAll</a>(childItems); } TreeItem <span class="operator">*</span>TreeItem<span class="operator">::</span>child(<span class="type">int</span> number) { <span class="keyword">return</span> childItems<span class="operator">.</span>value(number); } <span class="type">int</span> TreeItem<span class="operator">::</span>childCount() <span class="keyword">const</span> { <span class="keyword">return</span> childItems<span class="operator">.</span>count(); } <span class="type">int</span> TreeItem<span class="operator">::</span>childNumber() <span class="keyword">const</span> { <span class="keyword">if</span> (parentItem) <span class="keyword">return</span> parentItem<span class="operator">-</span><span class="operator">></span>childItems<span class="operator">.</span>indexOf(<span class="keyword">const_cast</span><span class="operator"><</span>TreeItem<span class="operator">*</span><span class="operator">></span>(<span class="keyword">this</span>)); <span class="keyword">return</span> <span class="number">0</span>; } <span class="type">int</span> TreeItem<span class="operator">::</span>columnCount() <span class="keyword">const</span> { <span class="keyword">return</span> itemData<span class="operator">.</span>count(); } <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> TreeItem<span class="operator">::</span>data(<span class="type">int</span> column) <span class="keyword">const</span> { <span class="keyword">return</span> itemData<span class="operator">.</span>value(column); } bool TreeItem<span class="operator">::</span>insertChildren(<span class="type">int</span> position<span class="operator">,</span> <span class="type">int</span> count<span class="operator">,</span> <span class="type">int</span> columns) { <span class="keyword">if</span> (position <span class="operator"><</span> <span class="number">0</span> <span class="operator">|</span><span class="operator">|</span> position <span class="operator">></span> childItems<span class="operator">.</span>size()) <span class="keyword">return</span> <span class="keyword">false</span>; <span class="keyword">for</span> (<span class="type">int</span> row <span class="operator">=</span> <span class="number">0</span>; row <span class="operator"><</span> count; <span class="operator">+</span><span class="operator">+</span>row) { <span class="type"><a href="../qtcore/qvector.html">QVector</a></span><span class="operator"><</span><span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span><span class="operator">></span> data(columns); TreeItem <span class="operator">*</span>item <span class="operator">=</span> <span class="keyword">new</span> TreeItem(data<span class="operator">,</span> <span class="keyword">this</span>); childItems<span class="operator">.</span>insert(position<span class="operator">,</span> item); } <span class="keyword">return</span> <span class="keyword">true</span>; } bool TreeItem<span class="operator">::</span>insertColumns(<span class="type">int</span> position<span class="operator">,</span> <span class="type">int</span> columns) { <span class="keyword">if</span> (position <span class="operator"><</span> <span class="number">0</span> <span class="operator">|</span><span class="operator">|</span> position <span class="operator">></span> itemData<span class="operator">.</span>size()) <span class="keyword">return</span> <span class="keyword">false</span>; <span class="keyword">for</span> (<span class="type">int</span> column <span class="operator">=</span> <span class="number">0</span>; column <span class="operator"><</span> columns; <span class="operator">+</span><span class="operator">+</span>column) itemData<span class="operator">.</span>insert(position<span class="operator">,</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span>()); foreach (TreeItem <span class="operator">*</span>child<span class="operator">,</span> childItems) child<span class="operator">-</span><span class="operator">></span>insertColumns(position<span class="operator">,</span> columns); <span class="keyword">return</span> <span class="keyword">true</span>; } TreeItem <span class="operator">*</span>TreeItem<span class="operator">::</span>parent() { <span class="keyword">return</span> parentItem; } bool TreeItem<span class="operator">::</span>removeChildren(<span class="type">int</span> position<span class="operator">,</span> <span class="type">int</span> count) { <span class="keyword">if</span> (position <span class="operator"><</span> <span class="number">0</span> <span class="operator">|</span><span class="operator">|</span> position <span class="operator">+</span> count <span class="operator">></span> childItems<span class="operator">.</span>size()) <span class="keyword">return</span> <span class="keyword">false</span>; <span class="keyword">for</span> (<span class="type">int</span> row <span class="operator">=</span> <span class="number">0</span>; row <span class="operator"><</span> count; <span class="operator">+</span><span class="operator">+</span>row) <span class="keyword">delete</span> childItems<span class="operator">.</span>takeAt(position); <span class="keyword">return</span> <span class="keyword">true</span>; } bool TreeItem<span class="operator">::</span>removeColumns(<span class="type">int</span> position<span class="operator">,</span> <span class="type">int</span> columns) { <span class="keyword">if</span> (position <span class="operator"><</span> <span class="number">0</span> <span class="operator">|</span><span class="operator">|</span> position <span class="operator">+</span> columns <span class="operator">></span> itemData<span class="operator">.</span>size()) <span class="keyword">return</span> <span class="keyword">false</span>; <span class="keyword">for</span> (<span class="type">int</span> column <span class="operator">=</span> <span class="number">0</span>; column <span class="operator"><</span> columns; <span class="operator">+</span><span class="operator">+</span>column) itemData<span class="operator">.</span>remove(position); foreach (TreeItem <span class="operator">*</span>child<span class="operator">,</span> childItems) child<span class="operator">-</span><span class="operator">></span>removeColumns(position<span class="operator">,</span> columns); <span class="keyword">return</span> <span class="keyword">true</span>; } bool TreeItem<span class="operator">::</span>setData(<span class="type">int</span> column<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> <span class="operator">&</span>value) { <span class="keyword">if</span> (column <span class="operator"><</span> <span class="number">0</span> <span class="operator">|</span><span class="operator">|</span> column <span class="operator">></span><span class="operator">=</span> itemData<span class="operator">.</span>size()) <span class="keyword">return</span> <span class="keyword">false</span>; itemData<span class="operator">[</span>column<span class="operator">]</span> <span class="operator">=</span> value; <span class="keyword">return</span> <span class="keyword">true</span>; } </pre> </div> <!-- @@@itemviews/editabletreemodel/treeitem.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>