XtRealizeWidget(3Xt)                 BSD                  XtRealizeWidget(3Xt)



NAME
     XtRealizeWidget, XtIsRealized, XtUnrealizeWidget - realize and unrealize
     widgets

SYNTAX
     void XtRealizeWidget(w)
           Widget w;

     Boolean XtIsRealized(w)
           Widget w;

     void XtUnrealizeWidget(w)
           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 widget, which adds any widget-specific
          attributes and creates the X window.

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

          -    Descends recursively to each of the widget's managed children
               and calls the realize procedures.  Primitive widgets that
               instantiate children are responsible for realizing those
               children 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 displayed.  Some people seem to like this to
               indicate certain states.)

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

     The XtIsRealized function returns True if the widget has been realized,
     that is, if the widget has a nonzero X window 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 managed, 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