XtSetSensitive
Section: XT FUNCTIONS (3)
Updated: libXt 1.0.7
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NAME
XtSetSensitive, XtIsSensitive - set and check a widget's sensitivity state
SYNTAX
-
- void XtSetSensitive(Widget w, Boolean sensitive);
-
- Boolean XtIsSensitive(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