XtCallCallbacks(3Xt)                 SysV                 XtCallCallbacks(3Xt)



NAME
     XtCallCallbacks, XtHasCallbacks - process callbacks

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