XtCallCallbacks(3Xt)        X Version 11(Release 3)        XtCallCallbacks(3Xt)


NAME
      XtCallCallbacks, XtHasCallbacks - process callbacks

SYNTAX
      void XtCallCallbacks(w, callback_name, call_data)
            Widget w;
            String callback_name;
            XtPointer call_data;

      typedef enum {XtCallbackNoList, XtCallbackHasNone, XtCallbackHasSome}
      XtCallbackStatus;

      XtCallbackStatus XtHasCallbacks(w, callback_name)
            Widget w;
            String callback_name;

ARGUMENTS
      callback_name
                Specifies the callback list to be executed or checked.

      call_data Specifies a callback-list specific data value to pass to each
                of the callback procedure in the list.

      w         Specifies the widget.

DESCRIPTION
      The XtCallCallbacks function calls each procedure that is registered in
      the specified widget's callback list.

      The XtHasCallbacks function first checks to see if the widget has a
      callback list identified by callback_name.  If the callback list does not
      exist, XtHasCallbacks returns XtCallbackNoList.  If the callback list
      exists but is empty, it returns XtCallbackHasNone.  If the callback list
      exists and has at least one callback registered, it returns
      XtCallbackHasSome.

SEE ALSO
      XtAddCallback(3Xt)
      X Toolkit Intrinsics - C Language Interface
      Xlib - C Language X Interface














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