X Version 11 (1 September 1988) XtSetSensitive(Xt)
NAME
XtSetSensitive, XtIsSensitive - set and check a widget's
sensitivity state
SYNTAX
void XtSetSensitive(w, sensitive)
Widget w;
Boolean sensitive;
Boolean XtIsSensitive(w)
Widget w;
ARGUMENTS
sensitive Specifies a Boolean value that indicates whether
the widget should receive keyboard and pointer
events.
w Specifies the widget.
DESCRIPTION
The XtSetSensitive function first calls XtSetValues on the
current widget with an argument list specifying that the
sensitive field should change to the new value. It then
recursively propagates the new value down the managed
children tree by calling XtSetValues on each child to set
the ancestor_sensitive to the new value if the new values
for sensitive and the child's ancestor_sensitive are not the
same.
XtSetSensitive calls XtSetValues to change sensitive and
ancestor_sensitive. Therefore, when one of these changes,
the widget's set_values procedure should take whatever
display actions are needed (for example, greying out or
stippling the widget).
XtSetSensitive maintains the invariant that if parent has
either sensitive or ancestor_sensitive False, then all
children have ancestor_sensitive False.
The XtIsSensitive function returns True or False to indicate
whether or not user input events are being dispatched. If
both core.sensitive and core.ancestor_sensitive are True,
XtIsSensitive returns True; otherwise, it returns False.
SEE ALSO
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
(printed 2/14/90) (1 September 1988) XtSetSensitive(Xt)