QWidgetFactory(3qt)													       QWidgetFactory(3qt)

NAME

       QWidgetFactory - For the dynamic creation of widgets from Qt Designer .ui files

SYNOPSIS

       #include <qwidgetfactory.h>

   Public Members
       QWidgetFactory ()
       virtual ~QWidgetFactory ()
       virtual QWidget * createWidget ( const QString & className, QWidget * parent, const char * name ) const

   Static Public Members
       QWidget * create ( const QString & uiFile, QObject * connector = 0, QWidget * parent = 0, const char * name = 0 )
       QWidget * create ( QIODevice * dev, QObject * connector = 0, QWidget * parent = 0, const char * name = 0 )
       void addWidgetFactory ( QWidgetFactory * factory )
       void loadImages ( const QString & dir )
       QStringList widgets ()
       bool supportsWidget ( const QString & widget )

DESCRIPTION

       The QWidgetFactory class provides for the dynamic creation of widgets from Qt Designer .ui files.

       This class basically offers two things:

       Dynamically creating widgets from Qt DesignerQt Designer user interface description files. You can do this using the static function
       QWidgetFactory::create(). This function also performs signal and slot connections, tab ordering, etc., as defined in the .ui file, and
       returns the top-level widget in the .ui file. After creating the widget you can use QObject::child() and QObject::queryList() to access
       child widgets of this returned widget.

       Adding additional widget factories to be able to create custom widgets. See createWidget() for details.

       This class is not included in the Qt library itself. To use it you must link against libqui.so (Unix) or qui.lib (Windows), which is built
       into INSTALL/lib if you built Qt Designer (INSTALL is the directory where Qt is installed ).

       See the "Creating Dynamic Dialogs from .ui Files" section of the Qt Designer manual for an example. See also the QWidgetPlugin class and
       the Plugins documentation.

MEMBER FUNCTION DOCUMENTATION

QWidgetFactory::QWidgetFactory ()
       Constructs a QWidgetFactory.

QWidgetFactory::~QWidgetFactory () [virtual]
       Destructor.

void QWidgetFactory::addWidgetFactory ( QWidgetFactory * factory ) [static]
       Installs a widget factory factory, which normally contains additional widgets that can then be created using a QWidgetFactory. See
       createWidget() for further details.

QWidget * QWidgetFactory::create ( const QString & uiFile, QObject * connector = 0, QWidget * parent = 0, const char * name = 0 ) [static]
       Loads the Qt Designer user interface description file uiFile and returns the top-level widget in that description. parent and name are
       passed to the constructor of the top-level widget.

       This function also performs signal and slot connections, tab ordering, etc., as described in the .ui file. In Qt Designer it is possible to
       add custom slots to a form and connect to them. If you want these connections to be made, you must create a class derived from QObject,
       which implements all these slots. Then pass an instance of the object as connector to this function. If you do this, the connections to the
       custom slots will be done using the connector as slot.

       If something fails, 0 is returned.

       The ownership of the returned widget is passed to the caller.

QWidget * QWidgetFactory::create ( QIODevice * dev, QObject * connector = 0, QWidget * parent = 0, const char * name = 0 ) [static]
       This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

       Loads the user interface description from device dev.

QWidget * QWidgetFactory::createWidget ( const QString & className, QWidget * parent, const char * name ) const [virtual]
       Creates a widget of the type className passing parent and name to its constructor.

       If className is a widget in the Qt library, it is directly created by this function. If the widget isn't in the Qt library, each of the
       installed widget plugins is asked, in turn, to create the widget. As soon as a plugin says it can create the widget it is asked to do so.
       It may occur that none of the plugins can create the widget, in which case each installed widget factory is asked to create the widget (see
       addWidgetFactory()). If the widget cannot be created by any of these means, 0 is returned.

       If you have a custom widget, and want it to be created using the widget factory, there are two approaches you can use:

       <ol type=1>

       Write a widget plugin. This allows you to use the widget in Qt Designer and in this QWidgetFactory. See the widget plugin documentation for
       further details. (See the "Creating Custom Widgets with Plugins" section of the Qt Designer manual for an example.

       Subclass QWidgetFactory. Then reimplement this function to create and return an instance of your custom widget if className equals the name
       of your widget, otherwise return 0. Then at the beginning of your program where you want to use the widget factory to create widgets do a:

		  QWidgetFactory::addWidgetFactory( new MyWidgetFactory );
	      where MyWidgetFactory is your QWidgetFactory subclass.

void QWidgetFactory::loadImages ( const QString & dir ) [static]
       If you use a pixmap collection (which is the default for new projects) rather than saving the pixmaps within the .ui XML file, you must
       load the pixmap collection. QWidgetFactory looks in the default QMimeSourceFactory for the pixmaps. Either add it there manually, or call
       this function and specify the directory where the images can be found, as dir. This is normally the directory called images in the
       project's directory.

bool QWidgetFactory::supportsWidget ( const QString & widget ) [static]
       Returns whether this widget factory can create the widget widget

QStringList QWidgetFactory::widgets () [static]
       Returns the names of the widgets, which this facory can create.

SEE ALSO

       http://doc.trolltech.com/qwidgetfactory.html http://www.trolltech.com/faq/tech.html

COPYRIGHT

       Copyright 1992-2001 Trolltech AS, 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
       (qwidgetfactory.3qt) and the Qt version (3.1.1).

Trolltech AS							  9 December 2002					       QWidgetFactory(3qt)