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XtSetSensitive, XtIsSensitive - set and
check a widget's sensitivity state
void XtSetSensitive(w, sensitive)
Widget w;
Boolean sensitive;
Boolean XtIsSensitive(w)
Widget w;
- sensitive
- Specifies a Boolean value that indicates whether the
widget should receive keyboard and pointer events.
- w
- Specifies the widget.
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.
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
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