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<?xml version="1.0" encoding="UTF-8"?>
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<title>KExtendableItemDelegate</title>
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KDE 4.9 PyKDE API Reference
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<li>KDE's Python API</li>
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<h1>KExtendableItemDelegate Class Reference</h1>
<code>from PyKDE4.kdeui import *</code>
<p>
Inherits: QStyledItemDelegate → QAbstractItemDelegate → QObject<br />
<h2>Detailed Description</h2>
<p>This delegate makes it possible to display an arbitrary QWidget ("extender") that spans all columns below a line of items.
The extender will logically belong to a column in the row above it.
</p>
<p>
It is your responsibility to devise a way to trigger extension and contraction of items, by calling
extendItem() and contractItem(). You can e.g. reimplement itemActivated() and similar functions.
</p>
<p>
<dl class="warning" compact><dt><b>Warning:</b></dt><dd> extendItem() reparents the provided widget <b>extender</b> to the
viewport of the itemview it belongs to. The <b>extender</b> is destroyed when
you call contractItem() for the associated index. If you fail to do that
and the associated item gets deleted you're in trouble. It remains as a
visible artefact in your treeview. Additionally when closing your
application you get an assertion failure from KExtendableItemDelegate. Make
sure that you always call contractItem for indices before you delete them.
</dd></dl> </p>
<p>
<dl class="author" compact><dt><b>Author:</b></dt><dd> Andreas Hartmetz <ahartmetz@gmail.com> </dd></dl>
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.1
</dd></dl>
</p>
<table border="0" cellpadding="0" cellspacing="0"><tr><td colspan="2"><br><h2>Enumerations</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="#auxDataRoles">auxDataRoles</a> </td><td class="memItemRight" valign="bottom">{ ShowExtensionIndicatorRole }</td></tr>
<tr><td colspan="2"><br><h2>Signals</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#extenderCreated">extenderCreated</a> (QWidget extender, QModelIndex index)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#extenderDestroyed">extenderDestroyed</a> (QWidget extender, QModelIndex index)</td></tr>
<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="#KExtendableItemDelegate">__init__</a> (self, QAbstractItemView parent)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#contractAll">contractAll</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#contractItem">contractItem</a> (self, QModelIndex index)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">QPixmap </td><td class="memItemRight" valign="bottom"><a class="el" href="#contractPixmap">contractPixmap</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#extendItem">extendItem</a> (self, QWidget extender, QModelIndex index)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">QPixmap </td><td class="memItemRight" valign="bottom"><a class="el" href="#extendPixmap">extendPixmap</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">QRect </td><td class="memItemRight" valign="bottom"><a class="el" href="#extenderRect">extenderRect</a> (self, QWidget extender, QStyleOptionViewItem option, QModelIndex index)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#isExtended">isExtended</a> (self, QModelIndex index)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#paint">paint</a> (self, QPainter painter, QStyleOptionViewItem option, QModelIndex index)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#setContractPixmap">setContractPixmap</a> (self, QPixmap pixmap)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#setExtendPixmap">setExtendPixmap</a> (self, QPixmap pixmap)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">QSize </td><td class="memItemRight" valign="bottom"><a class="el" href="#sizeHint">sizeHint</a> (self, QStyleOptionViewItem option, QModelIndex index)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#updateExtenderGeometry">updateExtenderGeometry</a> (self, QWidget extender, QStyleOptionViewItem option, QModelIndex index)</td></tr>
</table>
<hr><h2>Signal Documentation</h2><a class="anchor" name="extenderCreated"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> extenderCreated</td>
<td>(</td>
<td class="paramtype">QWidget </td>
<td class="paramname"><em>extender</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QModelIndex </td>
<td class="paramname"><em>index</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>This signal indicates that the item at <b>index</b> was extended with <b>extender.</b>
</p><dl compact><dt><b>Signal syntax:</b></dt><dd><code>QObject.connect(source, SIGNAL("extenderCreated(QWidget*, const QModelIndex&)"), target_slot)</code></dd></dl></div></div><a class="anchor" name="extenderDestroyed"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> extenderDestroyed</td>
<td>(</td>
<td class="paramtype">QWidget </td>
<td class="paramname"><em>extender</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QModelIndex </td>
<td class="paramname"><em>index</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>This signal indicates that the <b>extender</b> belonging to <b>index</b> has emitted the destroyed() signal.
</p><dl compact><dt><b>Signal syntax:</b></dt><dd><code>QObject.connect(source, SIGNAL("extenderDestroyed(QWidget*, const QModelIndex&)"), target_slot)</code></dd></dl></div></div><hr><h2>Method Documentation</h2><a class="anchor" name="KExtendableItemDelegate"></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">QAbstractItemView </td>
<td class="paramname"><em>parent</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Create a new KExtendableItemDelegate that belongs to <b>parent.</b> In contrast to generic
QAbstractItemDelegates, an instance of this class can only ever be the delegate for one
instance of af QAbstractItemView subclass.
</p></div></div><a class="anchor" name="contractAll"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> contractAll</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname"><em>self</em> )</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>Close all extenders and delete all extender widgets.
</p></div></div><a class="anchor" name="contractItem"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> contractItem</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">QModelIndex </td>
<td class="paramname"><em>index</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Remove the extender of item at <b>index</b> from the view. The extender widget
will be deleted.
</p></div></div><a class="anchor" name="contractPixmap"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">QPixmap contractPixmap</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname"><em>self</em> )</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>Return the pixmap that is displayed to contract an item.
</p></div></div><a class="anchor" name="extendItem"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> extendItem</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">QWidget </td>
<td class="paramname"><em>extender</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QModelIndex </td>
<td class="paramname"><em>index</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Insert the <b>extender</b> for item at <b>index</b> into the view.
If you need a parent for the extender at construction time, use the itemview's viewport().
The delegate takes ownership of the extender; the extender will also be reparented and
resized to the viewport.
</p></div></div><a class="anchor" name="extendPixmap"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">QPixmap extendPixmap</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname"><em>self</em> )</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>Return the pixmap that is displayed to extend an item.
</p></div></div><a class="anchor" name="extenderRect"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">QRect extenderRect</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">QWidget </td>
<td class="paramname"><em>extender</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QStyleOptionViewItem </td>
<td class="paramname"><em>option</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QModelIndex </td>
<td class="paramname"><em>index</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Reimplement this function to fine-tune the position of the extender. <b>option.rect</b> will be a rectangle
that is as wide as the viewport and as high as the usual item height plus the extender size hint's height.
Its upper left corner will be at the upper left corner of the usual item.
You can place the returned rectangle of this function anywhere inside that area.
</p></div></div><a class="anchor" name="isExtended"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool isExtended</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">QModelIndex </td>
<td class="paramname"><em>index</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Return whether there is an extender that belongs to <b>index.</b>
</p></div></div><a class="anchor" name="paint"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> paint</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">QPainter </td>
<td class="paramname"><em>painter</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QStyleOptionViewItem </td>
<td class="paramname"><em>option</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QModelIndex </td>
<td class="paramname"><em>index</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Re-implemented for internal reasons. API not affected.
</p></div></div><a class="anchor" name="setContractPixmap"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setContractPixmap</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">QPixmap </td>
<td class="paramname"><em>pixmap</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>The pixmap that is displayed to contract an item. <b>pixmap</b> must have the same size as the pixmap in setExtendPixmap.
</p></div></div><a class="anchor" name="setExtendPixmap"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setExtendPixmap</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">QPixmap </td>
<td class="paramname"><em>pixmap</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>The pixmap that is displayed to extend an item. <b>pixmap</b> must have the same size as the pixmap in setContractPixmap.
</p></div></div><a class="anchor" name="sizeHint"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">QSize sizeHint</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">QStyleOptionViewItem </td>
<td class="paramname"><em>option</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QModelIndex </td>
<td class="paramname"><em>index</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Re-implemented for internal reasons. API not affected.
</p></div></div><a class="anchor" name="updateExtenderGeometry"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> updateExtenderGeometry</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">QWidget </td>
<td class="paramname"><em>extender</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QStyleOptionViewItem </td>
<td class="paramname"><em>option</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QModelIndex </td>
<td class="paramname"><em>index</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Reimplement this function to adjust the internal geometry of the extender.
The external geometry of the extender will be set by the delegate.
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<div class="memdoc"><dl compact><dt><b>Enumerator: </b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0"><tr><td valign="top"><em>ShowExtensionIndicatorRole</em> = Qt::UserRole+200</td><td></table>
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