XtSetSensitive(Xt) X Version 11 (Release 5) XtSetSensitive(Xt)
6 January 1993
Name
XtSetSensitive - 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 sensi-
tive 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