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<title>QSqlRelationalDelegate Class | Qt SQL 5.12.6</title>
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<td >Qt 5.12</td><td ><a href="qtsql-index.html">Qt SQL</a></td><td ><a href="qtsql-module.html">C++ Classes</a></td><td >QSqlRelationalDelegate</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right"><a href="qtsql-index.html">Qt 5.12.6 Reference Documentation</a></td>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#reimplemented-public-functions">Reimplemented Public Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QSqlRelationalDelegate Class</h1>
<!-- $$$QSqlRelationalDelegate-brief -->
<p>The <a href="qsqlrelationaldelegate.html">QSqlRelationalDelegate</a> 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 -->
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<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QSqlRelationalDelegate></span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += sql</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> <a href="../qtwidgets/qitemdelegate.html">QItemDelegate</a></td></tr></table></div><ul>
<li><a href="qsqlrelationaldelegate-members.html">List of all members, including inherited members</a></li>
<li><a href="qsqlrelationaldelegate-obsolete.html">Obsolete members</a></li>
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<h2 id="public-functions">Public Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaldelegate.html#QSqlRelationalDelegate">QSqlRelationalDelegate</a></b>(QObject *<i>parent</i> = nullptr)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qsqlrelationaldelegate.html#dtor.QSqlRelationalDelegate">~QSqlRelationalDelegate</a></b>()</td></tr>
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<h2 id="reimplemented-public-functions">Reimplemented Public Functions</h2>
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<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 &<i>option</i>, const QModelIndex &<i>index</i>) const override</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 &<i>index</i>) const override</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 &<i>index</i>) const override</td></tr>
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<li class="fn">10 public functions inherited from <a href="../qtwidgets/qitemdelegate.html#public-functions">QItemDelegate</a></li>
<li class="fn">9 public functions inherited from <a href="../qtwidgets/qabstractitemdelegate.html#public-functions">QAbstractItemDelegate</a></li>
<li class="fn">31 public functions inherited from <a href="../qtcore/qobject.html#public-functions">QObject</a></li>
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<h3>Additional Inherited Members</h3>
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<li class="fn">1 property inherited from <a href="../qtwidgets/qitemdelegate.html#properties">QItemDelegate</a></li>
<li class="fn">1 property inherited from <a href="../qtcore/qobject.html#properties">QObject</a></li>
<li class="fn">1 public slot inherited from <a href="../qtcore/qobject.html#public-slots">QObject</a></li>
<li class="fn">3 signals inherited from <a href="../qtwidgets/qabstractitemdelegate.html#signals">QAbstractItemDelegate</a></li>
<li class="fn">2 signals inherited from <a href="../qtcore/qobject.html#signals">QObject</a></li>
<li class="fn">9 static public members inherited from <a href="../qtcore/qobject.html#static-public-members">QObject</a></li>
<li class="fn">7 protected functions inherited from <a href="../qtwidgets/qitemdelegate.html#protected-functions">QItemDelegate</a></li>
<li class="fn">9 protected functions inherited from <a href="../qtcore/qobject.html#protected-functions">QObject</a></li>
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<a name="details"></a>
<!-- $$$QSqlRelationalDelegate-description -->
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<h2 id="details">Detailed Description</h2>
<p>The <a href="qsqlrelationaldelegate.html">QSqlRelationalDelegate</a> 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, <a href="qsqlrelationaldelegate.html">QSqlRelationalDelegate</a> provides a combobox for fields that are foreign keys into other tables. To use the class, simply call <a href="../qtwidgets/qabstractitemview.html#setItemDelegate">QAbstractItemView::setItemDelegate</a>() on the view with an instance of <a href="qsqlrelationaldelegate.html">QSqlRelationalDelegate</a>:</p>
<pre class="cpp">
<span class="type"><a href="../qtwidgets/qtableview.html">QTableView</a></span> <span class="operator">*</span>view <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qtableview.html">QTableView</a></span>;
view<span class="operator">-</span><span class="operator">></span>setModel(model);
view<span class="operator">-</span><span class="operator">></span>setItemDelegate(<span class="keyword">new</span> <span class="type"><a href="qsqlrelationaldelegate.html#QSqlRelationalDelegate">QSqlRelationalDelegate</a></span>(view));
</pre>
<p>The <a href="qtsql-relationaltablemodel-example.html">Relational Table Model</a> example (shown below) illustrates how to use <a href="qsqlrelationaldelegate.html">QSqlRelationalDelegate</a> 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="../qtwidgets/model-view-programming.html">Model/View Programming</a>.</p>
<!-- @@@QSqlRelationalDelegate -->
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<h2>Member Function Documentation</h2>
<!-- $$$QSqlRelationalDelegate[overload1]$$$QSqlRelationalDelegateQObject* -->
<h3 class="fn" id="QSqlRelationalDelegate"><a name="QSqlRelationalDelegate"></a>QSqlRelationalDelegate::<span class="name">QSqlRelationalDelegate</span>(<span class="type"><a href="../qtcore/qobject.html#QObject">QObject</a></span> *<i>parent</i> = nullptr)</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" id="dtor.QSqlRelationalDelegate"><a name="dtor.QSqlRelationalDelegate"></a><code>[virtual] </code>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" id="createEditor"><a name="createEditor"></a><code>[override virtual] </code><span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span> *QSqlRelationalDelegate::<span class="name">createEditor</span>(<span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span> *<i>parent</i>, const <span class="type"><a href="../qtwidgets/qstyleoptionviewitem.html">QStyleOptionViewItem</a></span> &<i>option</i>, const <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> &<i>index</i>) const</h3>
<p>Reimplemented from <a href="../qtwidgets/qitemdelegate.html#createEditor">QItemDelegate::createEditor</a>().</p>
<!-- @@@createEditor -->
<!-- $$$setEditorData[overload1]$$$setEditorDataQWidget*constQModelIndex& -->
<h3 class="fn" id="setEditorData"><a name="setEditorData"></a><code>[override virtual] </code><span class="type">void</span> QSqlRelationalDelegate::<span class="name">setEditorData</span>(<span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span> *<i>editor</i>, const <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> &<i>index</i>) const</h3>
<!-- @@@setEditorData -->
<!-- $$$setModelData[overload1]$$$setModelDataQWidget*QAbstractItemModel*constQModelIndex& -->
<h3 class="fn" id="setModelData"><a name="setModelData"></a><code>[override virtual] </code><span class="type">void</span> QSqlRelationalDelegate::<span class="name">setModelData</span>(<span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span> *<i>editor</i>, <span class="type"><a href="../qtcore/qabstractitemmodel.html">QAbstractItemModel</a></span> *<i>model</i>, const <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> &<i>index</i>) const</h3>
<p>Reimplemented from <a href="../qtwidgets/qitemdelegate.html#setModelData">QItemDelegate::setModelData</a>().</p>
<!-- @@@setModelData -->
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