XCheckWindowEvent man page on HP-UX

XCheckWindowEvent man page on HP-UX

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XCheckWindowEvent()					   XCheckWindowEvent()

Name
  XCheckWindowEvent  –	remove the next event matching both passed window
  and passed mask; don't wait.

Synopsis
  Bool XCheckWindowEvent(display, w, event_mask, event_return)
	Display *display;
	Window w;
	long event_mask;
	XEvent *event_return;

Arguments
  display   Specifies  a  connection  to  an  X	 server;  returned   from
	    XOpenDisplay().

  w	    Specifies  the  window  ID.	  The  event  must match both the
	    passed window and the passed event mask.

  event_mask
	    Specifies the event mask.  See XSelectInput() for a	 list  of
	    mask elements.

  event_return
	    Returns the XEvent structure.

Returns
  True if a matching event is found, else False.

Description
  XCheckWindowEvent()  removes	the  next event in the queue that matches
  both the passed window and the passed mask.  If such an  event  exists,
  it  is copied into an XEvent supplied by the caller.	Other events ear‐
  lier in the queue are not discarded.

  If a matching event is found, XCheckWindowEvent() returns True.  If  no
  such	event  has been queued, it flushes the request buffer and returns
  False, without waiting.

  XCheckWindowEvent() cannot return ClientMessage, MappingNotify,  Selec‐
  tionClear,  SelectionNotify,	or  SelectionRequest events because these
  event types are by definition unmaskable.

  For more information, see Volume One, Chapter 8, Events.

See Also
  XQLength(), XAllowEvents(), XCheckIfEvent(), XCheckMaskEvent(), XCheck‐
  TypedEvent(),	 XCheckTypedWindowEvent(),  XEventsQueued(), XGetInputFo‐
  cus(),  XGetMotionEvents(),  XIfEvent(),  XMaskEvent(),   XNextEvent(),
  XPeekEvent(),	 XPeekIfEvent(),  XPending(), XPutBackEvent(), XSelectIn‐
  put(), XSendEvent(), XSetInputFocus(), XSynchronize(), XWindowEvent().

Xlib - Input Handling					   XCheckWindowEvent()

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