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QNPlugin(3qt)									    QNPlugin(3qt)

NAME
       QNPlugin - The main factory for plugin objects

SYNOPSIS
       This class is part of the Qt Netscape Extension.

       #include <qnp.h>

   Public Members
       virtual ~QNPlugin ()
       void getVersionInfo ( int & plugin_major, int & plugin_minor, int & browser_major, int &
	   browser_minor )
       virtual QNPInstance * newInstance () = 0
       virtual const char * getMIMEDescription () const = 0
       virtual const char * getPluginNameString () const = 0
       virtual const char * getPluginDescriptionString () const = 0
       virtual void * getJavaClass ()
       virtual void unuseJavaClass ()
       void * getJavaEnv () const

   Static Public Members
       QNPlugin * create ()
       QNPlugin * actual ()

   Protected Members
       QNPlugin ()

DESCRIPTION
       This class is defined in the Qt Netscape Extension, which can be found in the
       qt/extensions directory. It is not included in the main Qt API.

       The QNPlugin class provides the main factory for plugin objects.

       This class is the heart of the plugin. One instance of this object is created when the
       plugin is first needed, by calling QNPlugin::create(), which must be implemented in your
       plugin code to return some derived class of QNPlugin. The one QNPlugin object creates all
       QNPInstance instances for a web browser running in a single process.

       Additionally, if Qt is linked to the plugin as a dynamic library, only one instance of
       QApplication will exist across all plugins that have been made with Qt. So, your plugin
       should tread lightly on global settings. Do not, for example, use QApplication::setFont()
       - that will change the font in every widget of every Qt-based plugin currently loaded!

MEMBER FUNCTION DOCUMENTATION
QNPlugin::QNPlugin () [protected]
       Creates a QNPlugin. This may only be used by the constructor of the class, derived from
       QNPlugin, that is returned by your plugin's implementation of the QNPlugin::create()
       function.

QNPlugin::~QNPlugin () [virtual]
       Destroys the QNPlugin. This is called by the plugin binding code just before the plugin is
       about to be unloaded from memory. If newWindow() has been called, a QApplication will
       still exist at this time, but will be deleted shortly after, just before the plugin is
       deleted.

QNPlugin * QNPlugin::actual () [static]
       Returns the plugin most recently returned by QNPlugin::create().

QNPlugin * QNPlugin::create () [static]
       This function must be implemented by your plugin code. It should return a derived class of
       QNPlugin.

void * QNPlugin::getJavaClass () [virtual]
       Override this function to return a reference to the Java class that represents the plugin.
       The default returns 0, indicating no class.

       If you override this class, you must also override QNPlugin::unuseJavaClass().

       The return value is actually a jref; we use void* so as to avoid burdening plugins which
       do not require Java.

       See also getJavaEnv() and QNPInstance::getJavaPeer().

void * QNPlugin::getJavaEnv () const
       Returns a pointer to the Java execution environment, or 0 if either Java is disabled or an
       error occurred.

       The return value is actually a JRIEnv*; we use void* so as to avoid burdening plugins
       which do not require Java.

       See also getJavaClass() and QNPInstance::getJavaPeer().

const char * QNPlugin::getMIMEDescription () const [pure virtual]
       Override this function to return the MIME description of the data formats supported by
       your plugin. The format of this string is shown by the following example:

	   const char* getMIMEDescription() const
	   {
	       return "image/x-png:png:PNG Image;"
		      "image/png:png:PNG Image;"
		      "image/x-portable-bitmap:pbm:PBM Image;"
		      "image/x-portable-graymap:pgm:PGM Image;"
		      "image/x-portable-pixmap:ppm:PPM Image;"
		      "image/bmp:bmp:BMP Image;"
		      "image/x-ms-bmp:bmp:BMP Image;"
		      "image/x-xpixmap:xpm:XPM Image;"
		      "image/xpm:xpm:XPM Image";
	   }

const char * QNPlugin::getPluginDescriptionString () const [pure virtual]
       Returns a pointer to the plain-text description of the plugin.

const char * QNPlugin::getPluginNameString () const [pure virtual]
       Returns a pointer to the plain-text name of the plugin.

void QNPlugin::getVersionInfo ( int & plugin_major, int & plugin_minor, int & browser_major, int
       & browser_minor )
       Populates *plugin_major and *plugin_minor with the version of the plugin API and populates
       *browser_major and *browser_minor with the version of the web browser.

QNPInstance * QNPlugin::newInstance () [pure virtual]
       Override this function to return an appropriate derived class of QNPInstance.

void QNPlugin::unuseJavaClass () [virtual]
       This function is called when the plugin is shutting down. The function should unuse the
       Java class returned earlier by getJavaClass().

SEE ALSO
       http://doc.trolltech.com/qnplugin.html http://www.trolltech.com/faq/tech.html

COPYRIGHT
       Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com.  See the license file
       included in the distribution for a complete license statement.

AUTHOR
       Generated automatically from the source code.

BUGS
       If you find a bug in Qt, please report it as described in
       http://doc.trolltech.com/bughowto.html.	Good bug reports help us to help you. Thank you.

       The definitive Qt documentation is provided in HTML format; it is located at
       $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is
       provided as a convenience for those users who prefer man pages, although this format is
       not officially supported by Trolltech.

       If you find errors in this manual page, please report them to qt-bugs@trolltech.com.
       Please include the name of the manual page (qnplugin.3qt) and the Qt version (3.3.8).

Trolltech AS				 2 February 2007			    QNPlugin(3qt)
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