XtRealizeWidget(3Xt)          SDK X11 R4.11MU05         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


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