Tk_HandleEvent - invoke event handlers for window system events
Tk_HandleEvent is a lower-level procedure that deals with window
events. It is called by Tcl_ServiceEvent (and indirectly by
Tcl_DoOneEvent), and in a few other cases within Tk.
It makes callbacks to any window event
handlers (created by calls to Tk_CreateEventHandler)
that match eventPtr and then returns. In some cases
it may be useful for an application to bypass the Tk event
queue and call Tk_HandleEvent directly instead of
calling Tcl_QueueEvent followed by
- XEvent *eventPtr (in)
Pointer to X event to dispatch to relevant handler(s). It is important
that all unused fields of the structure be set to zero.
This procedure may be invoked recursively. For example,
it is possible to invoke Tk_HandleEvent recursively
from a handler called by Tk_HandleEvent. This sort
of operation is useful in some modal situations, such
as when a
notifier has been popped up and an application wishes to
wait for the user to click a button in the notifier before
doing anything else.
callback, event, handler, window
Copyright © 1995-1997 Roger E. Critchlow Jr.
Copyright © 1990-1992 The Regents of the University of California.
Copyright © 1994-1996 Sun Microsystems, Inc.