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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<!-- qsqlrelationaldelegate.cpp -->
  <title>Qt 4.8: QSqlRelationalDelegate Class Reference</title>
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    <a href="index.html" class="qtref"><span>Qt Reference Documentation</span></a>
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<div class="toc">
<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
</ul>
</div>
<h1 class="title">QSqlRelationalDelegate Class Reference</h1>
<!-- $$$QSqlRelationalDelegate-brief -->
<p>The QSqlRelationalDelegate class provides a delegate that is used to display and edit data from a <a href="qsqlrelationaltablemodel.html">QSqlRelationalTableModel</a>. <a href="#details">More...</a></p>
<!-- @@@QSqlRelationalDelegate -->
<pre class="cpp"> <span class="preprocessor">#include &lt;QSqlRelationalDelegate&gt;</span></pre><p><b>Inherits: </b><a href="qitemdelegate.html">QItemDelegate</a>.</p>
<ul>
<li><a href="qsqlrelationaldelegate-members.html">List of all members, including inherited members</a></li>
</ul>
<a name="public-functions"></a>
<h2>Public Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaldelegate.html#QSqlRelationalDelegate">QSqlRelationalDelegate</a></b> ( QObject * <i>parent</i> = 0 )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaldelegate.html#dtor.QSqlRelationalDelegate">~QSqlRelationalDelegate</a></b> ()</td></tr>
</table>
<a name="reimplemented-public-functions"></a>
<h2>Reimplemented Public Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> virtual QWidget * </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaldelegate.html#createEditor">createEditor</a></b> ( QWidget * <i>parent</i>, const QStyleOptionViewItem &amp; <i>option</i>, const QModelIndex &amp; <i>index</i> ) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaldelegate.html#setEditorData">setEditorData</a></b> ( QWidget * <i>editor</i>, const QModelIndex &amp; <i>index</i> ) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaldelegate.html#setModelData">setModelData</a></b> ( QWidget * <i>editor</i>, QAbstractItemModel * <i>model</i>, const QModelIndex &amp; <i>index</i> ) const</td></tr>
</table>
<ul>
<li class="fn">10 public functions inherited from <a href="qitemdelegate.html#public-functions">QItemDelegate</a></li>
<li class="fn">7 public functions inherited from <a href="qabstractitemdelegate.html#public-functions">QAbstractItemDelegate</a></li>
<li class="fn">29 public functions inherited from <a href="qobject.html#public-functions">QObject</a></li>
</ul>
<h3>Additional Inherited Members</h3>
<ul>
<li class="fn">1 property inherited from <a href="qitemdelegate.html#properties">QItemDelegate</a></li>
<li class="fn">1 property inherited from <a href="qobject.html#properties">QObject</a></li>
<li class="fn">1 public slot inherited from <a href="qabstractitemdelegate.html#public-slots">QAbstractItemDelegate</a></li>
<li class="fn">1 public slot inherited from <a href="qobject.html#public-slots">QObject</a></li>
<li class="fn">3 signals inherited from <a href="qabstractitemdelegate.html#signals">QAbstractItemDelegate</a></li>
<li class="fn">1 signal inherited from <a href="qobject.html#signals">QObject</a></li>
<li class="fn">7 static public members inherited from <a href="qobject.html#static-public-members">QObject</a></li>
<li class="fn">7 protected functions inherited from <a href="qitemdelegate.html#protected-functions">QItemDelegate</a></li>
<li class="fn">8 protected functions inherited from <a href="qobject.html#protected-functions">QObject</a></li>
</ul>
<a name="details"></a>
<!-- $$$QSqlRelationalDelegate-description -->
<div class="descr">
<h2>Detailed Description</h2>
<p>The QSqlRelationalDelegate class provides a delegate that is used to display and edit data from a <a href="qsqlrelationaltablemodel.html">QSqlRelationalTableModel</a>.</p>
<p>Unlike the default delegate, QSqlRelationalDelegate provides a combobox for fields that are foreign keys into other tables. To use the class, simply call <a href="qabstractitemview.html#setItemDelegate">QAbstractItemView::setItemDelegate</a>() on the view with an instance of QSqlRelationalDelegate:</p>
<pre class="cpp">     <span class="type"><a href="qtableview.html">QTableView</a></span> <span class="operator">*</span>view <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtableview.html">QTableView</a></span>;
     view<span class="operator">-</span><span class="operator">&gt;</span>setModel(model);
     view<span class="operator">-</span><span class="operator">&gt;</span>setItemDelegate(<span class="keyword">new</span> <span class="type">QSqlRelationalDelegate</span>(view));</pre>
<p>The <a href="sql-relationaltablemodel.html">Relational Table Model</a> example (shown below) illustrates how to use QSqlRelationalDelegate in conjunction with <a href="qsqlrelationaltablemodel.html">QSqlRelationalTableModel</a> to provide tables with foreign key support.</p>
<p class="centerAlign"><img src="images/relationaltable.png" alt="" /></p></div>
<p><b>See also </b><a href="qsqlrelationaltablemodel.html">QSqlRelationalTableModel</a> and <a href="model-view-programming.html">Model/View Programming</a>.</p>
<!-- @@@QSqlRelationalDelegate -->
<div class="func">
<h2>Member Function Documentation</h2>
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<h3 class="fn"><a name="QSqlRelationalDelegate"></a>QSqlRelationalDelegate::<span class="name">QSqlRelationalDelegate</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>parent</i> = 0 )</h3>
<p>Constructs a <a href="qsqlrelationaldelegate.html">QSqlRelationalDelegate</a> object with the given <i>parent</i>.</p>
<!-- @@@QSqlRelationalDelegate -->
<!-- $$$~QSqlRelationalDelegate[overload1]$$$~QSqlRelationalDelegate -->
<h3 class="fn"><a name="dtor.QSqlRelationalDelegate"></a>QSqlRelationalDelegate::<span class="name">~QSqlRelationalDelegate</span> ()</h3>
<p>Destroys the <a href="qsqlrelationaldelegate.html">QSqlRelationalDelegate</a> object and frees any allocated resources.</p>
<!-- @@@~QSqlRelationalDelegate -->
<!-- $$$createEditor[overload1]$$$createEditorQWidget*constQStyleOptionViewItem&constQModelIndex& -->
<h3 class="fn"><a name="createEditor"></a><span class="type"><a href="qwidget.html">QWidget</a></span> * QSqlRelationalDelegate::<span class="name">createEditor</span> ( <span class="type"><a href="qwidget.html">QWidget</a></span> * <i>parent</i>, const <span class="type"><a href="qstyleoptionviewitem.html">QStyleOptionViewItem</a></span> &amp; <i>option</i>, const <span class="type"><a href="qmodelindex.html">QModelIndex</a></span> &amp; <i>index</i> ) const<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qabstractitemdelegate.html#createEditor">QAbstractItemDelegate::createEditor</a>().</p>
<!-- @@@createEditor -->
<!-- $$$setEditorData[overload1]$$$setEditorDataQWidget*constQModelIndex& -->
<h3 class="fn"><a name="setEditorData"></a><span class="type">void</span> QSqlRelationalDelegate::<span class="name">setEditorData</span> ( <span class="type"><a href="qwidget.html">QWidget</a></span> * <i>editor</i>, const <span class="type"><a href="qmodelindex.html">QModelIndex</a></span> &amp; <i>index</i> ) const<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qabstractitemdelegate.html#setEditorData">QAbstractItemDelegate::setEditorData</a>().</p>
<!-- @@@setEditorData -->
<!-- $$$setModelData[overload1]$$$setModelDataQWidget*QAbstractItemModel*constQModelIndex& -->
<h3 class="fn"><a name="setModelData"></a><span class="type">void</span> QSqlRelationalDelegate::<span class="name">setModelData</span> ( <span class="type"><a href="qwidget.html">QWidget</a></span> * <i>editor</i>, <span class="type"><a href="qabstractitemmodel.html">QAbstractItemModel</a></span> * <i>model</i>, const <span class="type"><a href="qmodelindex.html">QModelIndex</a></span> &amp; <i>index</i> ) const<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qabstractitemdelegate.html#setModelData">QAbstractItemDelegate::setModelData</a>().</p>
<!-- @@@setModelData -->
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