HandleEvent

Tk_HandleEvent(3)            Tk Library Procedures           Tk_HandleEvent(3)



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NAME
       Tk_HandleEvent - invoke event handlers for window system events

SYNOPSIS
       #include <tk.h>

       Tk_HandleEvent(eventPtr)

ARGUMENTS
       XEvent   *eventPtr   (in)      Pointer  to X event to dispatch to rele-
                                      vant handler(s).
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DESCRIPTION
       Tk_HandleEvent is  a  lower-level  procedure  that  deals  with  window
       events.    It   is   called  by  Tcl_ServiceEvent  (and  indirectly  by
       Tk_DoOneEvent), and in a few other cases within Tk.  It makes callbacks
       to  any  window  event  handlers  (created  by  calls to Tk_CreateEven-
       tHandler) 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_Han-
       dleEvent.   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 any-
       thing else.


KEYWORDS
       callback, event, handler, window



Tk                                                           Tk_HandleEvent(3)