XtAddEventHandler(3Xt)        X11 SDE 5.4R3.00        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
                 procedure should be called or removed on the nonmaskable
                 events (GraphicsExpose, NoExpose, SelectionClear,
                 SelectionRequest, SelectionNotify, ClientMessage, and
                 MappingNotify).

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




Licensed material--property of copyright holder(s)                         1

XtAddEventHandler(3Xt)        X11 SDE 5.4R3.00        XtAddEventHandler(3Xt)


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

DESCRIPTION
       The XtAddEventHandler function registers a procedure with the
       dispatch mechanism that is to be called when an event that matches
       the mask occurs on the specified 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, XtAddEventHandler
       calls XSelectInput, if necessary.

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

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

       The XtRemoveRawEventHandler 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 XSelectInput.

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

























Licensed material--property of copyright holder(s)                         2