1XSendEvent(3)                   XLIB FUNCTIONS                   XSendEvent(3)
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NAME

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

10       Status XSendEvent(Display *display,  Window  w,  Bool  propagate,  long
11              event_mask, XEvent *event_send);
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13       unsigned long XDisplayMotionBufferSize(Display *display);
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15       XTimeCoord  *XGetMotionEvents(Display  *display,  Window w, Time start,
16              Time stop, int *nevents_return);
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ARGUMENTS

19       display   Specifies the connection to the X server.
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21       event_mask
22                 Specifies the event mask.
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24       event_send
25                 Specifies the event that is to be sent.
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27       nevents_return
28                 Returns the number of events from the motion history buffer.
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30       propagate Specifies a Boolean value.
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32       start
33       stop      Specify the time interval in which the  events  are  returned
34                 from  the motion history buffer.  You can pass a timestamp or
35                 CurrentTime.  PointerWindow, or InputFocus.
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37       w         Specifies the window the window the event is to be sent to.
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DESCRIPTION

40       The XSendEvent function identifies the destination  window,  determines
41       which  clients should receive the specified events, and ignores any ac‐
42       tive grabs.  This function requires you to pass an event mask.   For  a
43       discussion of the valid event mask names, see section 10.3.  This func‐
44       tion uses the w argument to identify the destination window as follows:
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46       •    If w is PointerWindow, the destination window is the  window  that
47            contains the pointer.
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49       •    If  w  is InputFocus and if the focus window contains the pointer,
50            the destination window is the window that  contains  the  pointer;
51            otherwise, the destination window is the focus window.
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53       To determine which clients should receive the specified events, XSendE‐
54       vent uses the propagate argument as follows:
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56       •    If event_mask is the empty set, the event is sent  to  the  client
57            that created the destination window.  If that client no longer ex‐
58            ists, no event is sent.
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60       •    If propagate is False, the event is sent to every client selecting
61            on destination any of the event types in the event_mask argument.
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63       •    If  propagate  is True and no clients have selected on destination
64            any of the event types in event-mask, the destination is  replaced
65            with the closest ancestor of destination for which some client has
66            selected a type in event-mask and for which no intervening  window
67            has that type in its do-not-propagate-mask.  If no such window ex‐
68            ists or if the window is an ancestor of the focus window  and  In‐
69            putFocus was originally specified as the destination, the event is
70            not sent to any clients.  Otherwise, the event is reported to  ev‐
71            ery  client  selecting  on  the final destination any of the types
72            specified in event_mask.
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74       The event in the XEvent structure must be one of the core events or one
75       of  the events defined by an extension (or a BadValue error results) so
76       that the X server can correctly byte-swap the  contents  as  necessary.
77       The  contents of the event are otherwise unaltered and unchecked by the
78       X server except to force send_event to True in the forwarded event  and
79       to set the serial number in the event correctly; therefore these fields
80       and the display field are ignored by XSendEvent.
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82       XSendEvent returns zero if  the  conversion  to  wire  protocol  format
83       failed and returns nonzero otherwise.  XSendEvent can generate BadValue
84       and BadWindow errors.
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86       The server may retain the recent history of the pointer motion  and  do
87       so to a finer granularity than is reported by MotionNotify events.  The
88       XGetMotionEvents function makes this history available.
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90       The XGetMotionEvents function returns all events in the motion  history
91       buffer that fall between the specified start and stop times, inclusive,
92       and that have coordinates that lie within the specified window (includ‐
93       ing its borders) at its present placement.  If the server does not sup‐
94       port motion history, if the start time is later than the stop time,  or
95       if the start time is in the future, no events are returned; XGetMotion‐
96       Events returns NULL.  If the stop time is in the future, it is  equiva‐
97       lent  to  specifying CurrentTime.  XGetMotionEvents can generate a Bad‐
98       Window error.
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STRUCTURES

101       The XTimeCoord structure contains:
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103       typedef struct {
104               Time time;
105               short x, y;
106       } XTimeCoord;
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108       The time member is set to the time, in milliseconds.  The x and y  mem‐
109       bers  are  set to the coordinates of the pointer and are reported rela‐
110       tive to the origin of the specified window.
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DIAGNOSTICS

113       BadValue  Some numeric value falls outside the range of values accepted
114                 by  the request.  Unless a specific range is specified for an
115                 argument, the full range defined by the  argument's  type  is
116                 accepted.   Any argument defined as a set of alternatives can
117                 generate this error.
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119       BadWindow A value for a Window argument does not name a defined Window.
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SEE ALSO

122       XAnyEvent(3), XIfEvent(3), XNextEvent(3), XPutBackEvent(3)
123       Xlib - C Language X Interface
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127X Version 11                     libX11 1.8.7                    XSendEvent(3)
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