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<title>Qt 4.8: treeitem.cpp Example File (itemviews/editabletreemodel/treeitem.cpp)</title>
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<h1 class="title">treeitem.cpp Example File</h1>
<span class="small-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) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
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** met:
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****************************************************************************/</span>
<span class="comment">/*
treeitem.cpp
A container for items of data supplied by the simple tree model.
*/</span>
<span class="preprocessor">#include <QStringList></span>
<span class="preprocessor">#include "treeitem.h"</span>
TreeItem<span class="operator">::</span>TreeItem(<span class="keyword">const</span> <span class="type"><a href="qvector.html">QVector</a></span><span class="operator"><</span><span class="type"><a href="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="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="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);
}
<span class="type">bool</span> 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="qvector.html">QVector</a></span><span class="operator"><</span><span class="type"><a href="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>;
}
<span class="type">bool</span> 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="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;
}
<span class="type">bool</span> 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>;
}
<span class="type">bool</span> 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>;
}
<span class="type">bool</span> 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="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>
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<!-- @@@itemviews/editabletreemodel/treeitem.cpp -->
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