XtAddEventHandler man page on Ultrix

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XtAddEventHandler(3Xt)		     X11R5		XtAddEventHandler(3Xt)

NAME
       XtAddEventHandler, XtAddRawEventHandler, XtRemoveEventHandler,
       XtRemoveRawEventHandler - add and remove event handlers

SYNTAX
       void XtAddEventHandler(w, event_mask, nonmaskable, proc, client_data)
	     Widget w;
	     EventMask event_mask;
	     Boolean nonmaskable;
	     XtEventHandler proc;
	     XtPointer client_data;

       void XtAddRawEventHandler(w, event_mask, nonmaskable, proc,
       client_data)
	     Widget w;
	     EventMask event_mask;
	     Boolean nonmaskable;
	     XtEventHandler proc;
	     XtPointer client_data;

       void XtRemoveEventHandler(w, event_mask, nonmaskable, proc,
       client_data)
	     Widget w;
	     EventMask event_mask;
	     Boolean nonmaskable;
	     XtEventHandler proc;
	     XtPointer client_data;

       void XtRemoveRawEventHandler(w, event_mask, nonmaskable, proc,
       client_data)
	     Widget w;
	     EventMask event_mask;
	     Boolean nonmaskable;
	     XtEventHandler proc;
	     XtPointer client_data;

ARGUMENTS
       client_data
		 Specifies additional data to be passed to the client's event
		 handler.

       event_mask
		 Specifies the event mask for which to call or unregister this
		 procedure.

       nonmaskable
		 Specifies a Boolean value that indicates whether this proce‐
		 dure should be called or removed on the nonmaskable events
		 and

       proc	 Specifies the procedure that is to be added or removed.

       w	 Specifies the widget for which this event handler is being
		 registered.

DESCRIPTION
       The function registers a procedure with the dispatch mechanism that is
       to be called when an event that matches the mask occurs on the speci‐
       fied widget.  If the procedure is already registered with the same
       client_data, the specified mask is ORed into the existing mask.	If the
       widget is realized, calls if necessary.

       The function is similar to except that it does not affect the widget's
       mask and never causes an for its events.	 Note that the widget might
       already have those mask bits set because of other nonraw event handlers
       registered on it.

       The function is similar to except that it does not affect the widget's
       mask and never causes an for its events.	 Note that the widget might
       already have those mask bits set because of other nonraw event handlers
       registered on it.

       The function stops the specified procedure from receiving the specified
       events.	Because the procedure is a raw event handler, this does not
       affect the widget's mask and never causes a call on

SEE ALSO
       XtAppNextEvent(3Xt), XtBuildEventMask(3Xt)
       X Toolkit Intrinsics - C Language Interface
       Xlib - C Language X Interface

							XtAddEventHandler(3Xt)
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