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95 lines
4.1 KiB
95 lines
4.1 KiB
14 years ago
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/kernel/qimageformatplugin.cpp:41 -->
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>QImageFormatPlugin Class</title>
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<font color="#004faf">Home</font></a>
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<font color="#004faf">All Classes</font></a>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QImageFormatPlugin Class Reference</h1>
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<p>The QImageFormatPlugin class provides an abstract base for custom image format plugins.
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<a href="#details">More...</a>
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<p><tt>#include <<a href="qimageformatplugin-h.html">qimageformatplugin.h</a>></tt>
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<p><a href="qimageformatplugin-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn><a href="#QImageFormatPlugin"><b>QImageFormatPlugin</b></a> ()</li>
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<li class=fn><a href="#~QImageFormatPlugin"><b>~QImageFormatPlugin</b></a> ()</li>
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<li class=fn>virtual QStringList <a href="#keys"><b>keys</b></a> () const = 0</li>
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<li class=fn>virtual bool <a href="#installIOHandler"><b>installIOHandler</b></a> ( const QString & format ) = 0</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The QImageFormatPlugin class provides an abstract base for custom image format plugins.
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<p>
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<p> The image format plugin is a simple plugin interface that makes
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it easy to create custom image formats that can be used
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transparently by applications.
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<p> Writing an image format plugin is achieved by subclassing this
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base class, reimplementing the pure virtual functions <a href="#keys">keys</a>() and
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<a href="#installIOHandler">installIOHandler</a>(), and exporting the class with the
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Q_EXPORT_PLUGIN macro. See the <a href="plugins-howto.html">Plugins
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documentation</a> for details.
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<p>See also <a href="plugins.html">Plugins</a>.
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="QImageFormatPlugin"></a>QImageFormatPlugin::QImageFormatPlugin ()
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</h3>
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Constructs an image format plugin. This is invoked automatically
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by the Q_EXPORT_PLUGIN macro.
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<h3 class=fn><a name="~QImageFormatPlugin"></a>QImageFormatPlugin::~QImageFormatPlugin ()
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</h3>
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Destroys the image format plugin.
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<p> You never have to call this explicitly. Qt destroys a plugin
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automatically when it is no longer used.
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<h3 class=fn>bool <a name="installIOHandler"></a>QImageFormatPlugin::installIOHandler ( const <a href="qstring.html">QString</a> & format )<tt> [pure virtual]</tt>
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</h3>
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<p> Installs a <a href="qimageio.html">QImageIO</a> image I/O handler for the image format <em>format</em>.
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<p> <p>See also <a href="#keys">keys</a>().
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<h3 class=fn><a href="qstringlist.html">QStringList</a> <a name="keys"></a>QImageFormatPlugin::keys () const<tt> [pure virtual]</tt>
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</h3>
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<p> Returns the list of image formats this plugin supports.
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<p> <p>See also <a href="#installIOHandler">installIOHandler</a>().
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<!-- eof -->
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<hr><p>
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This file is part of the <a href="index.html">Qt toolkit</a>.
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Copyright © 1995-2007
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<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>Qt 3.3.8</div>
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</table></div></address></body>
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