manpagez: man pages & more
man XSendEvent(3)
Home | html | info | man
XSendEvent(3)                   XLIB FUNCTIONS                   XSendEvent(3)




NAME

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


SYNTAX

       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);


ARGUMENTS

       display   Specifies the connection to the X server.

       event_mask
                 Specifies the event mask.

       event_send
                 Specifies the event that is to be sent.

       nevents_return
                 Returns the number of events from the motion history  buffer.

       propagate Specifies a Boolean value.

       start
       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.


DESCRIPTION

       The  XSendEvent  function identifies the destination window, determines
       which clients should receive the  specified  events,  and  ignores  any
       active 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
            exists, 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
            exists  or  if  the  window is an ancestor of the focus window and
            InputFocus was originally specified as the destination, the  event
            is  not  sent to any clients.  Otherwise, the event is reported to
            every 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.


STRUCTURES

       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.


DIAGNOSTICS

       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.


SEE ALSO

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



X Version 11                     libX11 1.6.9                    XSendEvent(3)

xorg-libX11 1.6.9 - Generated Sun Oct 20 10:38:59 CDT 2019
© manpagez.com 2000-2021
Individual documents may contain additional copyright information.