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<td width="1"> </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="functions.html"><font color="#004faf">All Functions</font></a> · <a href="overviews.html"><font color="#004faf">Overviews</font></a></td></tr></table><h1 class="title">QAbstractProxyModel Class Reference<br /><span class="small-subtitle">[<a href="qtgui.html">QtGui</a> module]</span>
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<p>The QAbstractProxyModel class provides a base class for proxy item models that can do sorting, filtering or other data processing tasks. <a href="#details">More...</a></p>
<pre> #include <QAbstractProxyModel></pre><p>Inherits <a href="qabstractitemmodel.html">QAbstractItemModel</a>.</p>
<p>Inherited by <a href="qsortfilterproxymodel.html">QSortFilterProxyModel</a>.</p>
<p>This class was introduced in Qt 4.1.</p>
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<li><a href="qabstractproxymodel-members.html">List of all members, including inherited members</a></li>
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<a name="public-functions"></a>
<h2>Public Functions</h2>
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<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qabstractproxymodel.html#QAbstractProxyModel">QAbstractProxyModel</a></b> ( QObject * <i>parent</i> = 0 )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qabstractproxymodel.html#dtor.QAbstractProxyModel">~QAbstractProxyModel</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual QModelIndex </td><td class="memItemRight" valign="bottom"><b><a href="qabstractproxymodel.html#mapFromSource">mapFromSource</a></b> ( const QModelIndex & <i>sourceIndex</i> ) const = 0</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual QItemSelection </td><td class="memItemRight" valign="bottom"><b><a href="qabstractproxymodel.html#mapSelectionFromSource">mapSelectionFromSource</a></b> ( const QItemSelection & <i>sourceSelection</i> ) const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual QItemSelection </td><td class="memItemRight" valign="bottom"><b><a href="qabstractproxymodel.html#mapSelectionToSource">mapSelectionToSource</a></b> ( const QItemSelection & <i>proxySelection</i> ) const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual QModelIndex </td><td class="memItemRight" valign="bottom"><b><a href="qabstractproxymodel.html#mapToSource">mapToSource</a></b> ( const QModelIndex & <i>proxyIndex</i> ) const = 0</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><b><a href="qabstractproxymodel.html#setSourceModel">setSourceModel</a></b> ( QAbstractItemModel * <i>sourceModel</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QAbstractItemModel * </td><td class="memItemRight" valign="bottom"><b><a href="qabstractproxymodel.html#sourceModel">sourceModel</a></b> () const</td></tr>
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<a name="reimplemented-public-functions"></a>
<h2>Reimplemented Public Functions</h2>
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<tr><td class="memItemLeft" align="right" valign="top">virtual QVariant </td><td class="memItemRight" valign="bottom"><b><a href="qabstractproxymodel.html#data">data</a></b> ( const QModelIndex & <i>proxyIndex</i>, int <i>role</i> = Qt::DisplayRole ) const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual Qt::ItemFlags </td><td class="memItemRight" valign="bottom"><b><a href="qabstractproxymodel.html#flags">flags</a></b> ( const QModelIndex & <i>index</i> ) const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual QVariant </td><td class="memItemRight" valign="bottom"><b><a href="qabstractproxymodel.html#headerData">headerData</a></b> ( int <i>section</i>, Qt::Orientation <i>orientation</i>, int <i>role</i> ) const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual QMap<int, QVariant> </td><td class="memItemRight" valign="bottom"><b><a href="qabstractproxymodel.html#itemData">itemData</a></b> ( const QModelIndex & <i>proxyIndex</i> ) const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><b><a href="qabstractproxymodel.html#revert">revert</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual bool </td><td class="memItemRight" valign="bottom"><b><a href="qabstractproxymodel.html#setData">setData</a></b> ( const QModelIndex & <i>index</i>, const QVariant & <i>value</i>, int <i>role</i> = Qt::EditRole )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual bool </td><td class="memItemRight" valign="bottom"><b><a href="qabstractproxymodel.html#setHeaderData">setHeaderData</a></b> ( int <i>section</i>, Qt::Orientation <i>orientation</i>, const QVariant & <i>value</i>, int <i>role</i> = Qt::EditRole )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual bool </td><td class="memItemRight" valign="bottom"><b><a href="qabstractproxymodel.html#submit">submit</a></b> ()</td></tr>
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<li><div bar="2" class="fn"></div>35 public functions inherited from <a href="qabstractitemmodel.html#public-functions">QAbstractItemModel</a></li>
<li><div bar="2" class="fn"></div>29 public functions inherited from <a href="qobject.html#public-functions">QObject</a></li>
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<h3>Additional Inherited Members</h3>
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<li><div class="fn"></div>1 property inherited from <a href="qobject.html#properties">QObject</a></li>
<li><div class="fn"></div>2 public slots inherited from <a href="qabstractitemmodel.html#public-slots">QAbstractItemModel</a></li>
<li><div class="fn"></div>1 public slot inherited from <a href="qobject.html#public-slots">QObject</a></li>
<li><div class="fn"></div>18 signals inherited from <a href="qabstractitemmodel.html#signals">QAbstractItemModel</a></li>
<li><div class="fn"></div>1 signal inherited from <a href="qobject.html#signals">QObject</a></li>
<li><div class="fn"></div>5 static public members inherited from <a href="qobject.html#static-public-members">QObject</a></li>
<li><div class="fn"></div>21 protected functions inherited from <a href="qabstractitemmodel.html#protected-functions">QAbstractItemModel</a></li>
<li><div class="fn"></div>7 protected functions inherited from <a href="qobject.html#protected-functions">QObject</a></li>
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<a name="details"></a>
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<h2>Detailed Description</h2>
<p>The QAbstractProxyModel class provides a base class for proxy item models that can do sorting, filtering or other data processing tasks.</p>
<p>This class defines the standard interface that proxy models must use to be able to interoperate correctly with other model/view components. It is not supposed to be instantiated directly.</p>
<p>All standard proxy models are derived from the QAbstractProxyModel class. If you need to create a new proxy model class, it is usually better to subclass an existing class that provides the closest behavior to the one you want to provide.</p>
<p>Proxy models that filter or sort items of data from a source model should be created by using or subclassing <a href="qsortfilterproxymodel.html">QSortFilterProxyModel</a>.</p>
<p>To subclass QAbstractProxyModel, you need to implement <a href="qabstractproxymodel.html#mapFromSource">mapFromSource</a>() and <a href="qabstractproxymodel.html#mapToSource">mapToSource</a>(). The <a href="qabstractproxymodel.html#mapSelectionFromSource">mapSelectionFromSource</a>() and <a href="qabstractproxymodel.html#mapSelectionToSource">mapSelectionToSource</a>() functions only need to be reimplemented if you need a behavior different from the default behavior.</p>
<p><b>Note:</b> If the source model is deleted or no source model is specified, the proxy model operates on a empty placeholder model.</p>
<p>See also <a href="qsortfilterproxymodel.html">QSortFilterProxyModel</a>, <a href="qabstractitemmodel.html">QAbstractItemModel</a>, and <a href="model-view-programming.html">Model/View Programming</a>.</p>
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<h2>Member Function Documentation</h2>
<a name="//apple_ref/cpp/instm/QAbstractProxyModel/QAbstractProxyModel"></a>
<h3 class="fn"><a name="QAbstractProxyModel"></a>QAbstractProxyModel::QAbstractProxyModel ( <a href="qobject.html">QObject</a> * <i>parent</i> = 0 )</h3>
<p>Constructs a proxy model with the given <i>parent</i>.</p>
<a name="//apple_ref/cpp/instm/QAbstractProxyModel/~QAbstractProxyModel"></a>
<h3 class="fn"><a name="dtor.QAbstractProxyModel"></a>QAbstractProxyModel::~QAbstractProxyModel ()</h3>
<p>Destroys the proxy model.</p>
<a name="//apple_ref/cpp/instm/QAbstractProxyModel/data"></a>
<h3 class="fn"><a name="data"></a><a href="qvariant.html">QVariant</a> QAbstractProxyModel::data ( const <a href="qmodelindex.html">QModelIndex</a> & <i>proxyIndex</i>, int <i>role</i> = Qt::DisplayRole ) const <tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qabstractitemmodel.html#data">QAbstractItemModel::data</a>().</p>
<p>See also <a href="qabstractproxymodel.html#setData">setData</a>().</p>
<a name="//apple_ref/cpp/instm/QAbstractProxyModel/flags"></a>
<h3 class="fn"><a name="flags"></a><a href="qt.html#ItemFlag-enum">Qt::ItemFlags</a> QAbstractProxyModel::flags ( const <a href="qmodelindex.html">QModelIndex</a> & <i>index</i> ) const <tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qabstractitemmodel.html#flags">QAbstractItemModel::flags</a>().</p>
<a name="//apple_ref/cpp/instm/QAbstractProxyModel/headerData"></a>
<h3 class="fn"><a name="headerData"></a><a href="qvariant.html">QVariant</a> QAbstractProxyModel::headerData ( int <i>section</i>, <a href="qt.html#Orientation-enum">Qt::Orientation</a> <i>orientation</i>, int <i>role</i> ) const <tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qabstractitemmodel.html#headerData">QAbstractItemModel::headerData</a>().</p>
<p>See also <a href="qabstractproxymodel.html#setHeaderData">setHeaderData</a>().</p>
<a name="//apple_ref/cpp/instm/QAbstractProxyModel/itemData"></a>
<h3 class="fn"><a name="itemData"></a><a href="qmap.html">QMap</a><int, <a href="qvariant.html">QVariant</a>> QAbstractProxyModel::itemData ( const <a href="qmodelindex.html">QModelIndex</a> & <i>proxyIndex</i> ) const <tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qabstractitemmodel.html#itemData">QAbstractItemModel::itemData</a>().</p>
<a name="//apple_ref/cpp/instm/QAbstractProxyModel/mapFromSource"></a>
<h3 class="fn"><a name="mapFromSource"></a><a href="qmodelindex.html">QModelIndex</a> QAbstractProxyModel::mapFromSource ( const <a href="qmodelindex.html">QModelIndex</a> & <i>sourceIndex</i> ) const <tt> [pure virtual]</tt></h3>
<p>Reimplement this function to return the model index in the proxy model that corresponds to the <i>sourceIndex</i> from the source model.</p>
<p>See also <a href="qabstractproxymodel.html#mapToSource">mapToSource</a>().</p>
<a name="//apple_ref/cpp/instm/QAbstractProxyModel/mapSelectionFromSource"></a>
<h3 class="fn"><a name="mapSelectionFromSource"></a><a href="qitemselection.html">QItemSelection</a> QAbstractProxyModel::mapSelectionFromSource ( const <a href="qitemselection.html">QItemSelection</a> & <i>sourceSelection</i> ) const <tt> [virtual]</tt></h3>
<p>Returns a proxy selection mapped from the specified <i>sourceSelection</i>.</p>
<p>Reimplement this method to map source selections to proxy selections.</p>
<a name="//apple_ref/cpp/instm/QAbstractProxyModel/mapSelectionToSource"></a>
<h3 class="fn"><a name="mapSelectionToSource"></a><a href="qitemselection.html">QItemSelection</a> QAbstractProxyModel::mapSelectionToSource ( const <a href="qitemselection.html">QItemSelection</a> & <i>proxySelection</i> ) const <tt> [virtual]</tt></h3>
<p>Returns a source selection mapped from the specified <i>proxySelection</i>.</p>
<p>Reimplement this method to map proxy selections to source selections.</p>
<a name="//apple_ref/cpp/instm/QAbstractProxyModel/mapToSource"></a>
<h3 class="fn"><a name="mapToSource"></a><a href="qmodelindex.html">QModelIndex</a> QAbstractProxyModel::mapToSource ( const <a href="qmodelindex.html">QModelIndex</a> & <i>proxyIndex</i> ) const <tt> [pure virtual]</tt></h3>
<p>Reimplement this function to return the model index in the source model that corresponds to the <i>proxyIndex</i> in the proxy model.</p>
<p>See also <a href="qabstractproxymodel.html#mapFromSource">mapFromSource</a>().</p>
<a name="//apple_ref/cpp/instm/QAbstractProxyModel/revert"></a>
<h3 class="fn"><a name="revert"></a>void QAbstractProxyModel::revert () <tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qabstractitemmodel.html#revert">QAbstractItemModel::revert</a>().</p>
<a name="//apple_ref/cpp/instm/QAbstractProxyModel/setData"></a>
<h3 class="fn"><a name="setData"></a>bool QAbstractProxyModel::setData ( const <a href="qmodelindex.html">QModelIndex</a> & <i>index</i>, const <a href="qvariant.html">QVariant</a> & <i>value</i>, int <i>role</i> = Qt::EditRole ) <tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qabstractitemmodel.html#setData">QAbstractItemModel::setData</a>().</p>
<p>See also <a href="qabstractproxymodel.html#data">data</a>().</p>
<a name="//apple_ref/cpp/instm/QAbstractProxyModel/setHeaderData"></a>
<h3 class="fn"><a name="setHeaderData"></a>bool QAbstractProxyModel::setHeaderData ( int <i>section</i>, <a href="qt.html#Orientation-enum">Qt::Orientation</a> <i>orientation</i>, const <a href="qvariant.html">QVariant</a> & <i>value</i>, int <i>role</i> = Qt::EditRole ) <tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qabstractitemmodel.html#setHeaderData">QAbstractItemModel::setHeaderData</a>().</p>
<p>See also <a href="qabstractproxymodel.html#headerData">headerData</a>().</p>
<a name="//apple_ref/cpp/instm/QAbstractProxyModel/setSourceModel"></a>
<h3 class="fn"><a name="setSourceModel"></a>void QAbstractProxyModel::setSourceModel ( <a href="qabstractitemmodel.html">QAbstractItemModel</a> * <i>sourceModel</i> ) <tt> [virtual]</tt></h3>
<p>Sets the given <i>sourceModel</i> to be processed by the proxy model.</p>
<p>See also <a href="qabstractproxymodel.html#sourceModel">sourceModel</a>().</p>
<a name="//apple_ref/cpp/instm/QAbstractProxyModel/sourceModel"></a>
<h3 class="fn"><a name="sourceModel"></a><a href="qabstractitemmodel.html">QAbstractItemModel</a> * QAbstractProxyModel::sourceModel () const</h3>
<p>Returns the model that contains the data that is available through the proxy model.</p>
<p>See also <a href="qabstractproxymodel.html#setSourceModel">setSourceModel</a>().</p>
<a name="//apple_ref/cpp/instm/QAbstractProxyModel/submit"></a>
<h3 class="fn"><a name="submit"></a>bool QAbstractProxyModel::submit () <tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qabstractitemmodel.html#submit">QAbstractItemModel::submit</a>().</p>
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