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KDE 4.9 PyKDE API Reference
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<h1>SelectionProxyModel Class Reference</h1>
<code>from PyKDE4.akonadi import *</code>
<p>
Inherits: <a href="../kdeui/KSelectionProxyModel.html">KSelectionProxyModel</a> → QAbstractProxyModel → QAbstractItemModel → QObject<br />
Subclasses: <a href="../akonadi/Akonadi.FavoriteCollectionsModel.html">Akonadi.FavoriteCollectionsModel</a><br />
Namespace: <a href="../akonadi/Akonadi.html">Akonadi</a><br />
<h2>Detailed Description</h2>
<p>A proxy model used to reference count selected Akonadi.Collection in a view
</p>
<p>
Only selected Collections will be populated and monitored for changes. Unselected
Collections will be ignored.
</p>
<p>
This model extends KSelectionProxyModel to implement reference counting on the Collections
in an EntityTreeModel. The EntityTreeModel must use LazyPopulation to enable
SelectionProxyModel to work.
</p>
<p>
By selecting a Collection, its reference count will be increased. A Collection in the
EntityTreeModel which has a reference count of zero will ignore all signals from Monitor
about items changed, inserted, removed etc, which can be expensive operations.
</p>
<p>
Example:
</p>
<p>
<pre class="fragment">
using namespace Akonadi;
// itemView
// ^
// |
// itemModel
// |
// flatModel
// |
// collectionView --> selectionModel
// ^ ^
// | |
// collectionFilter |
// \______________model
EntityTreeModel *model = new EntityTreeModel( ... );
// setup collection model
EntityMimeTypeFilterModel *collectionFilter = new EntityMimeTypeFilterModel( this );
collectionFilter->setSourceModel( model );
collectionFilter->addMimeTypeInclusionFilter( Collection.mimeType() );
collectionFilter->setHeaderGroup( EntityTreeModel.CollectionTreeHeaders );
// setup collection view
EntityTreeView *collectionView = new EntityTreeView( this );
collectionView->setModel( collectionFilter );
// setup selection model
SelectionProxyModel *selectionModel = new SelectionProxyModel( collectionView->selectionModel(), this );
selectionModel->setSourceModel( model );
// setup item model
KDescendantsProxyModel *flatModel = new KDescendantsProxyModel( this );
flatModel->setSourceModel( selectionModel );
EntityMimeTypeFilterModel *itemModel = new EntityMimeTypeFilterModel( this );
itemModel->setSourceModel( flatModel );
itemModel->setHeaderGroup( EntityTreeModel.ItemListHeaders );
itemModel->addMimeTypeExclusionFilter( Collection.mimeType() );
EntityListView *itemView = new EntityListView( this );
itemView->setModel( itemModel );
</pre>
</p>
<p>
See libakonadi_integration "Integration in your Application" for further guidance on the use of this class.
</p>
<p>
<dl class="author" compact><dt><b>Author:</b></dt><dd> Stephen Kelly <steveire@gmail.com> </dd></dl>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.4
</dd></dl>
</p>
<table border="0" cellpadding="0" cellspacing="0"><tr><td colspan="2"><br><h2>Methods</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#SelectionProxyModel">__init__</a> (self, QItemSelectionModel selectionModel, QObject parent=0)</td></tr>
</table>
<hr><h2>Method Documentation</h2><a class="anchor" name="SelectionProxyModel"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">__init__</td>
<td>(</td>
<td class="paramtype"> <em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QItemSelectionModel </td>
<td class="paramname"><em>selectionModel</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QObject </td>
<td class="paramname"><em>parent=0</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Creates a new selection proxy model.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>selectionModel</em> </td><td> The selection model of the source view.
<tr><td></td><td valign="top"><em>parent</em> </td><td> The parent object.
</td></tr>
</table></dl>
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