XtInsertEventTypeHandler(3X)					   XT FUNCTIONS 				      XtInsertEventTypeHandler(3X)

NAME

       XtInsertEventTypeHandler - extension event handling

SYNTAX

       void XtInsertEventTypeHandler(widget, event_type, select_data, proc, client_data, position)
	     Widget widget;
	     int event_type;
	     XtPointer select_data;
	     XtEventHandler proc;
	     XtPointer client_data;
	     XtListPosition position;

ARGUMENTS

       widget	 Specifies the widget for this event handler.  Must be of class Core or any subclass thereof.

       event_type
		 Specifies the event type.

       select_data
		 Specifies data used to select or deselect events from the server.

       proc	 Specifies the proc.

       client_data
		 Specifies additional data to be passed to the event handler.

       position  Specifies when the event handler is to be called relative to other previously registered handlers.

DESCRIPTION

       The XtInsertEventTypeHandler function registeres a procedure with the dispatch mechanism that is to be called when an event that matches
       the specified event_type is dispatched to the specified widget.

       If event_type is one of the core X protocol events then select_data must be a pointer to a value of type EventMask, indicating the event
       mask to be used to select for the desired event.  This event mask will be included in the value returned by XtBuildEventMask.  If the wid-
       get is realized XtInsertEventTypeHandler calls XSelectInput if necessary. Specifying NULL for select_data is equivalent to specifying a
       pointer to an event mask containing 0. This is similar to the XtInsertRawEventHandler function.

       If event_type specifies an extension event type then the semantics of the data pointed to by select_data are defined by the extension
       selector registered for the specified event type.

       In either case the Intrinsics are not required to copy the data pointed to by select_data, so the caller must ensure that it remains valid
       as long as the event handler remains registered with this value of select_data.

       The position argument allows the client to control the order of the invocation of event handlers registered for the same event type. If the
       client does not care about the order, it should normally specify XtListTail, which registers this event handler after any previously regis-
       tered handlers for this event type.

SEE ALSO

       XtEventHandlerProc(3X) XtGetKeyboardFocusWidget(3X), XtRemoveEventTypeHandler(3X), XtRegisterExtensionSelector(3X), XtSetEventDis-
       patcher(3X), XtDispatchEventToWidget(3X)

X Version 11							     Release 6					      XtInsertEventTypeHandler(3X)