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KDE 4.9 PyKDE API Reference
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<h1>PreviewJob Class Reference</h1>
<code>from PyKDE4.kio import *</code>
<p>
Inherits: <a href="../kio/KIO.Job.html">KIO.Job</a> → <a href="../kdecore/KCompositeJob.html">KCompositeJob</a> → <a href="../kdecore/KJob.html">KJob</a> → QObject<br />
Namespace: <a href="../kio/KIO.html">KIO</a><br />
<h2>Detailed Description</h2>
<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="#ScaleType">ScaleType</a> </td><td class="memItemRight" valign="bottom">{ Unscaled, Scaled, ScaledAndCached }</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="#failed">failed</a> (<a href="../kio/KFileItem.html">KFileItem</a> item)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#gotPreview">gotPreview</a> (<a href="../kio/KFileItem.html">KFileItem</a> item, QPixmap preview)</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="#PreviewJob">__init__</a> (self, <a href="../kio/KFileItemList.html">KFileItemList</a> items, int width, int height, int iconSize, int iconAlpha, bool scale, bool save, QStringList enabledPlugins)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#PreviewJob">__init__</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#PreviewJob">__init__</a> (self, <a href="../kio/KFileItemList.html">KFileItemList</a> items, QSize size, QStringList enabledPlugins=0)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="#overlayIconAlpha">overlayIconAlpha</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="#overlayIconSize">overlayIconSize</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#removeItem">removeItem</a> (self, <a href="../kdecore/KUrl.html">KUrl</a> url)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a href="../kio/KIO.PreviewJob.html#ScaleType">KIO.PreviewJob.ScaleType</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="#scaleType">scaleType</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="#sequenceIndex">sequenceIndex</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#setIgnoreMaximumSize">setIgnoreMaximumSize</a> (self, bool ignoreSize=1)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#setOverlayIconAlpha">setOverlayIconAlpha</a> (self, int alpha)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#setOverlayIconSize">setOverlayIconSize</a> (self, int size)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#setScaleType">setScaleType</a> (self, <a href="../kio/KIO.PreviewJob.html#ScaleType">KIO.PreviewJob.ScaleType</a> type)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#setSequenceIndex">setSequenceIndex</a> (self, int index)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#slotResult">slotResult</a> (self, <a href="../kdecore/KJob.html">KJob</a> job)</td></tr>
<tr><td colspan="2"><br><h2>Static Methods</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">QStringList </td><td class="memItemRight" valign="bottom"><a class="el" href="#availablePlugins">availablePlugins</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">long </td><td class="memItemRight" valign="bottom"><a class="el" href="#maximumFileSize">maximumFileSize</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">QStringList </td><td class="memItemRight" valign="bottom"><a class="el" href="#supportedMimeTypes">supportedMimeTypes</a> ()</td></tr>
</table>
<hr><h2>Signal Documentation</h2><a class="anchor" name="failed"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> failed</td>
<td>(</td>
<td class="paramtype"><a href="../kio/KFileItem.html">KFileItem</a> </td>
<td class="paramname"><em>item</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Emitted when a thumbnail for <b>item</b> could not be created,
either because a ThumbCreator for its MIME type does not
exist, or because something went wrong.
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>item</em> </td><td> the file that failed
</td></tr>
</table></dl>
<p>
</p><dl compact><dt><b>Signal syntax:</b></dt><dd><code>QObject.connect(source, SIGNAL("failed(const KFileItem&)"), target_slot)</code></dd></dl></div></div><a class="anchor" name="gotPreview"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> gotPreview</td>
<td>(</td>
<td class="paramtype"><a href="../kio/KFileItem.html">KFileItem</a> </td>
<td class="paramname"><em>item</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QPixmap </td>
<td class="paramname"><em>preview</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Emitted when a thumbnail picture for <b>item</b> has been successfully
retrieved.
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>item</em> </td><td> the file of the preview
<tr><td></td><td valign="top"><em>preview</em> </td><td> the preview image
</td></tr>
</table></dl>
<p>
</p><dl compact><dt><b>Signal syntax:</b></dt><dd><code>QObject.connect(source, SIGNAL("gotPreview(const KFileItem&, const QPixmap&)"), target_slot)</code></dd></dl></div></div><hr><h2>Method Documentation</h2><a class="anchor" name="PreviewJob"></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"><a href="../kio/KFileItemList.html">KFileItemList</a> </td>
<td class="paramname"><em>items</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>width</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>height</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>iconSize</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>iconAlpha</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"><em>scale</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"><em>save</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QStringList </td>
<td class="paramname"><em>enabledPlugins</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 PreviewJob.
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>items</em> </td><td> a list of files to create previews for
<tr><td></td><td valign="top"><em>width</em> </td><td> the desired width
<tr><td></td><td valign="top"><em>height</em> </td><td> the desired height, 0 to use the <b>width</b>
<tr><td></td><td valign="top"><em>iconSize</em> </td><td> the size of the mimetype icon to overlay over the
preview or zero to not overlay an icon. This has no effect if the
preview plugin that will be used doesn't use icon overlays.
<tr><td></td><td valign="top"><em>iconAlpha</em> </td><td> transparency to use for the icon overlay
<tr><td></td><td valign="top"><em>scale</em> </td><td> if the image is to be scaled to the requested size or
returned in its original size
<tr><td></td><td valign="top"><em>save</em> </td><td> if the image should be cached for later use
<tr><td></td><td valign="top"><em>enabledPlugins</em> </td><td> If non-zero, this points to a list containing
the names of the plugins that may be used. If enabledPlugins is zero
all available plugins are used.
</td></tr>
</table></dl>
<p> <dl class="deprecated" compact><dt><b>Deprecated:</b></dt><dd> Use PreviewJob(KFileItemList, QSize, QStringList) in combination
with the setter-methods instead. Note that the semantics of
</dd></dl> <b>enabledPlugins</b> has been slightly changed.
</p></div></div><a class="anchor" name="PreviewJob"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">__init__</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname"><em>self</em> )</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"></div></div><a class="anchor" name="PreviewJob"></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"><a href="../kio/KFileItemList.html">KFileItemList</a> </td>
<td class="paramname"><em>items</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QSize </td>
<td class="paramname"><em>size</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QStringList </td>
<td class="paramname"><em>enabledPlugins=0</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p></p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>items</em> </td><td> List of files to create previews for.
<tr><td></td><td valign="top"><em>size</em> </td><td> Desired size of the preview.
<tr><td></td><td valign="top"><em>enabledPlugins</em> </td><td> If non-zero it defines the list of plugins that
are considered for generating the preview. If
enabledPlugins is zero the plugins specified in the
KConfigGroup "PreviewSettings" are used.
</td></tr> </table></dl>
<p> <dl class="since" compact><dt><b>Since:</b></dt><dd> 4.7
</dd></dl>
</p></div></div><a class="anchor" name="overlayIconAlpha"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">int overlayIconAlpha</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><dl class="return" compact><dt><b>Returns:</b></dt><dd> The alpha-value for the MIME-type icon which overlays the preview.
Per default 70 is returned.
</dd></dl> <dl class="see" compact><dt><b>See also:</b></dt><dd> PreviewJob.setOverlayIconAlpha()
</dd></dl> <dl class="since" compact><dt><b>Since:</b></dt><dd> 4.7
</dd></dl>
</p></div></div><a class="anchor" name="overlayIconSize"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">int overlayIconSize</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><dl class="return" compact><dt><b>Returns:</b></dt><dd> The size of the MIME-type icon which overlays the preview.
</dd></dl> <dl class="see" compact><dt><b>See also:</b></dt><dd> PreviewJob.setOverlayIconSize()
</dd></dl> <dl class="since" compact><dt><b>Since:</b></dt><dd> 4.7
</dd></dl>
</p></div></div><a class="anchor" name="removeItem"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> removeItem</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"><a href="../kdecore/KUrl.html">KUrl</a> </td>
<td class="paramname"><em>url</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Removes an item from preview processing. Use this if you passed
an item to filePreview and want to delete it now.
</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>url</em> </td><td> the url of the item that should be removed from the preview queue
</td></tr>
</table></dl>
<p>
</p></div></div><a class="anchor" name="scaleType"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"><a href="../kio/KIO.PreviewJob.html#ScaleType">KIO.PreviewJob.ScaleType</a> scaleType</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><dl class="return" compact><dt><b>Returns:</b></dt><dd> The scale type for the generated preview.
</dd></dl> <dl class="see" compact><dt><b>See also:</b></dt><dd> PreviewJob.ScaleType
</dd></dl> <dl class="since" compact><dt><b>Since:</b></dt><dd> 4.7
</dd></dl>
</p></div></div><a class="anchor" name="sequenceIndex"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">int sequenceIndex</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>Returns the currently set sequence index
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> KDE 4.3
</dd></dl>
</p></div></div><a class="anchor" name="setIgnoreMaximumSize"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setIgnoreMaximumSize</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">bool </td>
<td class="paramname"><em>ignoreSize=1</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>If <b>ignoreSize</b> is true, then the preview is always
generated regardless of the settings
</p></div></div><a class="anchor" name="setOverlayIconAlpha"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setOverlayIconAlpha</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">int </td>
<td class="paramname"><em>alpha</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Sets the alpha-value for the MIME-type icon which overlays the preview.
The alpha-value may range from 0 (= fully transparent) to 255 (= opaque).
Per default the value is set to 70.
<dl class="see" compact><dt><b>See also:</b></dt><dd> PreviewJob.setOverlayIconSize()
</dd></dl> <dl class="since" compact><dt><b>Since:</b></dt><dd> 4.7
</dd></dl>
</p></div></div><a class="anchor" name="setOverlayIconSize"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setOverlayIconSize</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">int </td>
<td class="paramname"><em>size</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Sets the size of the MIME-type icon which overlays the preview. If zero
is passed no overlay will be shown at all. The setting has no effect if
the preview plugin that will be used does not use icon overlays. Per
default the size is set to 0.
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.7
</dd></dl>
</p></div></div><a class="anchor" name="setScaleType"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setScaleType</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"><a href="../kio/KIO.PreviewJob.html#ScaleType">KIO.PreviewJob.ScaleType</a> </td>
<td class="paramname"><em>type</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Sets the scale type for the generated preview. Per default
PreviewJob.ScaledAndCached is set.
<dl class="see" compact><dt><b>See also:</b></dt><dd> PreviewJob.ScaleType
</dd></dl> <dl class="since" compact><dt><b>Since:</b></dt><dd> 4.7
</dd></dl>
</p></div></div><a class="anchor" name="setSequenceIndex"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setSequenceIndex</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">int </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>Sets the sequence index given to the thumb creators.
Use the sequence index, it is possible to create alternative
icons for the same item. For example it may allow iterating through
the items of a directory, or the frames of a video.
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> KDE 4.3
</dd></dl>
</p></div></div><a class="anchor" name="slotResult"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> slotResult</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"><a href="../kdecore/KJob.html">KJob</a> </td>
<td class="paramname"><em>job</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
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<div class="memdoc"></div></div><hr><h2>Static Method Documentation</h2><a class="anchor" name="availablePlugins"></a>
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<td class="memname">QStringList availablePlugins</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">)</td>
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<div class="memdoc"><p>Returns a list of all available preview plugins. The list
contains the basenames of the plugins' .desktop files (no path,
no .desktop).
<dl class="return" compact><dt><b>Returns:</b></dt><dd> the list of plugins
</dd></dl>
</p></div></div><a class="anchor" name="maximumFileSize"></a>
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<td class="memname">long maximumFileSize</td>
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<div class="memdoc"><p>Returns the default "maximum file size", in bytes, used by PreviewJob.
This is useful for applications providing a GUI for letting the user change the size.
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.1
</dd></dl> <dl class="deprecated" compact><dt><b>Deprecated:</b></dt><dd> PreviewJob uses different maximum file sizes dependent on the URL since 4.5.
The returned file size is only valid for local URLs.
</dd></dl>
</p></div></div><a class="anchor" name="supportedMimeTypes"></a>
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<td class="memname">QStringList supportedMimeTypes</td>
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<div class="memdoc"><p>Returns a list of all supported MIME types. The list can
contain entries like text/ * (without the space).
<dl class="return" compact><dt><b>Returns:</b></dt><dd> the list of mime types
</dd></dl>
</p></div></div><hr><h2>Enumeration Documentation</h2><a class="anchor" name="ScaleType"></a>
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<div class="memdoc"><p>Specifies the type of scaling that is applied to the generated preview.
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.7
</dd></dl>
</p><dl compact><dt><b>Enumerator: </b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0"><tr><td valign="top"><em>Unscaled</em> </td><td><tr><td valign="top"><em>Scaled</em> </td><td><tr><td valign="top"><em>ScaledAndCached</em> </td><td></table>
</dl>
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