redhat man page for xtcallcallbacks

XtCallCallbacks(3Xt)						   XT FUNCTIONS 					      XtCallCallbacks(3Xt)

NAME
       XtCallCallbacks, XtCallCallbackList, XtHasCallbacks - process callbacks

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

       void XtCallCallbackList(w, callbacks, call_data)
	     Widget w;
	     XtCallbackList callbacks;
	     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.

       callbacks Specifies the callback list to be executed.

       w	 Specifies the widget.

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

       If callbacks is not NULL, XtCallCallbackList calls each of the callback procedures in the list, passing client data and call_data. The
       callbacks parameter must specify the contents of a widget or object resource declared with representation type XtRCallback.

       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 call-
       back 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

X Version 11							    Release 6.6 					      XtCallCallbacks(3Xt)