Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
XSendEvent(3)			XLIB FUNCTIONS			 XSendEvent(3)

       XSendEvent, XDisplayMotionBufferSize, XGetMotionEvents, XTimeCoord -
       send events and pointer motion history structure

       Status XSendEvent(Display *display, Window w, Bool propagate, long
	      event_mask, XEvent *event_send);

       unsigned	long XDisplayMotionBufferSize(Display *display);

       XTimeCoord *XGetMotionEvents(Display *display, Window w,	Time start,
	      Time stop, int *nevents_return);

       display	 Specifies the connection to the X server.

		 Specifies the event mask.

		 Specifies the event that is to	be sent.

		 Returns the number of events from the motion history buffer.

       propagate Specifies a Boolean value.

       stop	 Specify the time interval in which the	events are returned
		 from the motion history buffer.  You can pass a timestamp or
		 CurrentTime.  PointerWindow, or InputFocus.

       w	 Specifies the window the window the event is to be sent to,.

       The XSendEvent function identifies the destination window, determines
       which clients should receive the	specified events, and ignores any ac-
       tive grabs.  This function requires you to pass an event	mask.  For a
       discussion of the valid event mask names, see section 10.3.  This func-
       tion uses the w argument	to identify the	destination window as follows:

       o    If w is PointerWindow, the destination window is the window	that
	    contains the pointer.

       o    If w is InputFocus and if the focus	window contains	the pointer,
	    the	destination window is the window that contains the pointer;
	    otherwise, the destination window is the focus window.

       To determine which clients should receive the specified events, XSendE-
       vent uses the propagate argument	as follows:

       o    If event_mask is the empty set, the	event is sent to the client
	    that created the destination window.  If that client no longer ex-
	    ists, no event is sent.

       o    If propagate is False, the event is	sent to	every client selecting
	    on destination any of the event types in the event_mask argument.

       o    If propagate is True and no	clients	have selected on destination
	    any	of the event types in event-mask, the destination is replaced
	    with the closest ancestor of destination for which some client has
	    selected a type in event-mask and for which	no intervening window
	    has	that type in its do-not-propagate-mask.	 If no such window ex-
	    ists or if the window is an	ancestor of the	focus window and In-
	    putFocus was originally specified as the destination, the event is
	    not	sent to	any clients.  Otherwise, the event is reported to ev-
	    ery	client selecting on the	final destination any of the types
	    specified in event_mask.

       The event in the	XEvent structure must be one of	the core events	or one
       of the events defined by	an extension (or a BadValue error results) so
       that the	X server can correctly byte-swap the contents as necessary.
       The contents of the event are otherwise unaltered and unchecked by the
       X server	except to force	send_event to True in the forwarded event and
       to set the serial number	in the event correctly;	therefore these	fields
       and the display field are ignored by XSendEvent.

       XSendEvent returns zero if the conversion to wire protocol format
       failed and returns nonzero otherwise.  XSendEvent can generate BadValue
       and BadWindow errors.

       The server may retain the recent	history	of the pointer motion and do
       so to a finer granularity than is reported by MotionNotify events.  The
       XGetMotionEvents	function makes this history available.

       The XGetMotionEvents function returns all events	in the motion history
       buffer that fall	between	the specified start and	stop times, inclusive,
       and that	have coordinates that lie within the specified window (includ-
       ing its borders)	at its present placement.  If the server does not sup-
       port motion history, if the start time is later than the	stop time, or
       if the start time is in the future, no events are returned; XGetMotion-
       Events returns NULL.  If	the stop time is in the	future,	it is equiva-
       lent to specifying CurrentTime.	XGetMotionEvents can generate a	Bad-
       Window error.

       The XTimeCoord structure	contains:

       typedef struct {
	       Time time;
	       short x,	y;
       } XTimeCoord;

       The time	member is set to the time, in milliseconds.  The x and y mem-
       bers are	set to the coordinates of the pointer and are reported rela-
       tive to the origin of the specified window.

       BadValue	 Some numeric value falls outside the range of values accepted
		 by the	request.  Unless a specific range is specified for an
		 argument, the full range defined by the argument's type is
		 accepted.  Any	argument defined as a set of alternatives can
		 generate this error.

       BadWindow A value for a Window argument does not	name a defined Window.

       XAnyEvent(3), XIfEvent(3), XNextEvent(3), XPutBackEvent(3)
       Xlib - C	Language X Interface

X Version 11			 libX11	1.6.5			 XSendEvent(3)


Want to link to this manual page? Use this URL:

home | help