NAME

       XtSetSensitive, XtIsSensitive - set and check a widget's sensitivity state

SYNTAX

       #include <X11/Intrinsic.h>

       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