XtHasCallbacks() XtHasCallbacks()
Name
XtHasCallbacks - determine the status of a widget's callback list.
Synopsis
XtCallbackStatus XtHasCallbacks(object, callback_name)
Widget object;
String callback_name;
Inputs
object Specifies the object; may be of class Object or any subclass thereof.
callback_name
Specifies the callback list to be checked.
Returns
An XtCallbackStatus value.
Description
XtHasCallbacks() checks the widget for a resource named callback_name. If the resource does not exist or is not of type XtRCallback,
XtHasCallbacks() returns XtCallbackNoList. If the callback list exists but is empty, it returns XtCallbackHasNone. If the callback list
contains at least one callback procedure, it returns XtCallbackHasSome.
Structures
typedef enum {
XtCallbackNoList,
XtCallbackHasNone,
XtCallbackHasSome
} XtCallbackStatus;
See Also
XtAddCallbacks(1), XtCallCallbacks(1), XtCallCallbackList(1).
Xt - Callbacks XtHasCallbacks()
