XtRealizeWidget(3Xt)XtRealizeWidget(3Xt)NAME
XtRealizeWidget, XtIsRealized, XtUnrealizeWidget - realize and unreal‐
ize widgets
SYNOPSIS
void XtRealizeWidget(w)
Widget w;
Boolean XtIsRealized(w)
Widget w;
void XtUnrealizeWidget(w)
Widget w;
ARGUMENTS
Specifies the widget.
DESCRIPTION
If the widget is already realized, XtRealizeWidget simply returns. Oth‐
erwise, it performs the following: Binds all action names in the wid‐
get'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; other‐
wise, 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 realiz‐
ing those children themselves. Maps all of the managed children win‐
dows 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 win‐
dow.
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 wid‐
get 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 ALSOXtManageChildren(3Xt)
X Toolkit Intrinsics -- C Language Interface
Xlib -- C Language X Interface
XtRealizeWidget(3Xt)
