


XtRealizeWidget(3Xt)	   XT FUNCTIONS	     XtRealizeWidget(3Xt)


NAME
       XtRealizeWidget, XtIsRealized, XtUnrealizeWidget - realize
       and unrealize widgets

SYNTAX
       void XtRealizeWidget(Widget w);

       Boolean XtIsRealized(Widget w);

       void XtUnrealizeWidget(Widget w);

ARGUMENTS
       w	 Specifies the widget.

DESCRIPTION
       If the widget is already realized, XtRealizeWidget simply
       returns.	 Otherwise, it performs the following:

	   Binds all action names in the widget's translation
	    table to procedures (see Section 10.1.2).

	   Makes a post-order traversal of the widget tree
	    rooted at the specified widget and calls the
	    change_managed procedure of each composite widget
	    that has one or more managed children.

	   Constructs an XSetWindowAttributes structure filled
	    in with information derived from the Core widget
	    fields and calls the realize procedure for the wid
	    get, which adds any widget-specific attributes and
	    creates the X window.

	   If the widget is not a subclass of
	    compositeWidgetClass, XtRealizeWidget returns; other
	    wise, it continues and performs the following:

	    -	 Descends recursively to each of the widget's
		 managed children and calls the realize proce
		 dures.	 Primitive widgets that instantiate chil
		 dren are responsible for realizing those chil
		 dren themselves.

	    -	 Maps all of the managed children windows that
		 have mapped_when_managed True.	 (If a widget is
		 managed but mapped_when_managed is False, the
		 widget is allocated visual space but is not dis
		 played.  Some people seem to like this to indi
		 cate certain states.)

       If the widget is a top-level shell widget (that is, it has
       no parent), and mapped_when_managed is True, XtRealize_
       Widget maps the widget window.

       The XtIsRealized function returns True if the widget has



XFree86			  Version 4.8.0				1





XtRealizeWidget(3Xt)	   XT FUNCTIONS	     XtRealizeWidget(3Xt)


       been realized, that is, if the widget has a nonzero X win
       dow ID.

       Some widget procedures (for example, set_values) might
       wish to operate differently after the widget has been
       realized.

       The XtUnrealizeWidget function destroys the windows of an
       existing widget and all of its children (recursively down
       the widget tree).  To recreate the windows at a later
       time, call XtRealizeWidget again.  If the widget was man
       aged, it will be unmanaged automatically before its window
       is freed.

SEE ALSO
       XtManageChildren(3Xt)
       X Toolkit Intrinsics - C Language Interface
       Xlib - C Language X Interface







































XFree86			  Version 4.8.0				2


