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Tk_HandleEvent(3) Tk Library Procedures Tk_HandleEvent(3) ________________________________________________________________________________ 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 relevant handler(s). It is important that all unused fields of the structure be set to zero. ________________________________________________________________________________ DESCRIPTION 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 han- dlers (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. KEYWORDS callback, event, handler, window Tk Tk_HandleEvent(3)
NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | KEYWORDS
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