XtRealizeWidget(3) XT FUNCTIONS XtRealizeWidget(3)

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:

+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 1.1.5 XtRealizeWidget(3)