Tk_HandleEvent — invoke event handlers for window system events
#include <tk.h>
Tk_HandleEvent(eventPtr)
- 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.
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 Tcl_ServiceEvent.
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
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University of California.
Copyright © 1994-1996 Sun Microsystems, Inc.