1Tk_HandleEvent(3) Tk Library Procedures Tk_HandleEvent(3)
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8 Tk_HandleEvent - invoke event handlers for window system events
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11 #include <tk.h>
12 Tk_HandleEvent(eventPtr)
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16 XEvent *eventPtr (in) Pointer to X event to dispatch to rele‐
17 vant handler(s). It is important that
18 all unused fields of the structure be
19 set to zero.
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23 Tk_HandleEvent is a lower-level procedure that deals with window
24 events. It is called by Tcl_ServiceEvent (and indirectly by
25 Tk_DoOneEvent), and in a few other cases within Tk. It makes callbacks
26 to any window event handlers (created by calls to Tk_CreateEven‐
27 tHandler) that match eventPtr and then returns. In some cases it may
28 be useful for an application to bypass the Tk event queue and call
29 Tk_HandleEvent directly instead of calling Tcl_QueueEvent followed by
30 Tcl_ServiceEvent.
31 This procedure may be invoked recursively. For example, it is possible
33 to invoke Tk_HandleEvent recursively from a handler called by Tk_Han‐
34 dleEvent. This sort of operation is useful in some modal situations,
35 such as when a notifier has been popped up and an application wishes to
36 wait for the user to click a button in the notifier before doing any‐
37 thing else.
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40 callback, event, handler, window
41Tk Tk_HandleEvent(3)