xthascallbacks(3xt) [ultrix man page]

XtCallCallbacks(3Xt)						     MIT X11R4						      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 function calls each procedure that is registered in the specified widget's callback list.

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

See Also
       XtAddCallback(3Xt)
       X Window System Toolkit: The Complete Programmer's Guide and Specification, Paul J. Asente and Ralph Swick
       X Window System: The Complete Reference, Second Edition, Robert W. Scheifler and James Gettys

															      XtCallCallbacks(3Xt)

XtCallCallbacks(3Xt)													      XtCallCallbacks(3Xt)

NAME

       XtCallCallbacks, XtCallCallbacks, XtCallCallbackList, XtHasCallbacks - process callbacks

SYNOPSIS

       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

       Specifies  the callback list to be executed or checked.	Specifies a callback-list specific data value to pass to each of the callback pro-
       cedure in the list.  Specifies the callback list to be executed.  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 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

															      XtCallCallbacks(3Xt)