DragonFly On-Line Manual Pages

XtRealizeWidget(3)               XT FUNCTIONS               XtRealizeWidget(3)

NAME
       XtRealizeWidget, XtIsRealized, XtUnrealizeWidget - realize and
       unrealize widgets

SYNTAX
       #include <X11/Intrinsic.h>

       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:

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

       o    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.

       o    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.

       o    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(3)
       X Toolkit Intrinsics - C Language Interface
       Xlib - C Language X Interface

X Version 11                      libXt 1.2.1               XtRealizeWidget(3)