qimageformatplugin.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- /home/reggie/tmp/qt-3.0-reggie-5401/qt-x11-commercial-3.0.5/src/kernel/qimageformatplugin.cpp:41 --><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>QImageFormatPlugin Class</title><style type="text/css"><!--h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm; }a:link { color: #004faf; text-decoration: none }a:visited { color: #672967; text-decoration: none }body { background: #ffffff; color: black; }--></style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr bgcolor="#E5E5E5"><td 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="mainclasses.html"><font color="#004faf">Main Classes</font></a> | <a href="annotated.html"><font color="#004faf">Annotated</font></a> | <a href="groups.html"><font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"><font color="#004faf">Functions</font></a></td><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><p>The QImageFormatPlugin class provides an abstract base for custom image format plugins.<a href="#details">More...</a><p><tt>#include <<a href="qimageformatplugin-h.html">qimageformatplugin.h</a>></tt><p><a href="qimageformatplugin-members.html">List of all member functions.</a><h2>Public Members</h2><ul><li><div class=fn><a href="#QImageFormatPlugin"><b>QImageFormatPlugin</b></a> ()</div></li><li><div class=fn><a href="#~QImageFormatPlugin"><b>~QImageFormatPlugin</b></a> ()</div></li><li><div class=fn>virtual QStringList <a href="#keys"><b>keys</b></a> () const = 0</div></li><li><div class=fn>virtual bool <a href="#installIOHandler"><b>installIOHandler</b></a> ( const QString & format ) = 0</div></li></ul><hr><a name="details"></a><h2>Detailed Description</h2>The QImageFormatPlugin class provides an abstract base for custom image format plugins.<p> <p> The image format plugin is a simple plugin interface that makesit easy to create custom image formats that can be usedtransparently by applications.<p> Writing an image format plugin is achieved by subclassing thisbase class, reimplementing the pure virtual functions <a href="#keys">keys</a>() and<a href="#installIOHandler">installIOHandler</a>(), and exporting the class with theQ_EXPORT_PLUGIN macro. See the <a href="plugins-howto.html">Plugins documentation</a> for details.<p>See also <a href="plugins.html">Plugins</a>.<hr><h2>Member Function Documentation</h2><h3 class=fn><a name="QImageFormatPlugin"></a>QImageFormatPlugin::QImageFormatPlugin ()</h3>Constructs an image format plugin. This is invoked automaticallyby the Q_EXPORT_PLUGIN macro.<h3 class=fn><a name="~QImageFormatPlugin"></a>QImageFormatPlugin::~QImageFormatPlugin ()</h3>Destroys the image format plugin.<p> You never have to call this explicitly. Qt destroys a pluginautomatically when it is no longer used.<h3 class=fn>bool <a name="installIOHandler"></a>QImageFormatPlugin::installIOHandler ( const <a href="qstring.html">QString</a> & format )<tt> [pure virtual]</tt></h3><p> Installs a <a href="qimageio.html">QImageIO</a> image I/O handler for the image format <em>format</em>.<p> <p>See also <a href="#keys">keys</a>().<h3 class=fn><a href="qstringlist.html">QStringList</a> <a name="keys"></a>QImageFormatPlugin::keys () const<tt> [pure virtual]</tt></h3><p> Returns the list of image formats this plugin supports.<p> <p>See also <a href="#installIOHandler">installIOHandler</a>().<!-- eof --><hr><p>This file is part of the <a href="index.html">Qt toolkit</a>.Copyright © 1995-2002<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center><table width=100% cellspacing=0 border=0><tr><td>Copyright © 2002 <a href="http://www.trolltech.com">Trolltech</a><td><a href="http://www.trolltech.com/trademarks.html">Trademarks</a><td align=right><div align=right>Qt version 3.0.5</div></table></div></address></body></html>⌨️ 快捷键说明
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