XSENDEXTENSIONEVENT(3) |  | XSENDEXTENSIONEVENT(3)

# NAME

XSendExtensionEvent - send input extension events to a client

# SYNOPSIS

    #include <X11/extensions/XInput.h>

    Status XSendExtensionEvent( Display *display,
                                XDevice *device,
                                Window destination,
                                Bool propagate,
                                int event_count,
                                XEventClass *event_list,
                                XEvent *event_send);

    display
           Specifies the connection to the X server.

    device
           Specifies the device from which the events are to be
           sent.

    destination
           Specifies the window the event is to be sent to. You can
           pass window id, PointerWindow, or InputFocus.

    propagate
           Specifies a Boolean value that is either True or False.

    event_count
           Specifies the count of XEventClasses in event_list.

    event_list
           Specifies the list of event selections to be used.

    event_send
           Specifies a pointer to the event that is to be sent.

# DESCRIPTION

    The XSendExtensionEvent request identifies the destination
    window, determines which clients should receive the specified
    events, and ignores any active grabs. This request requires you
    to pass an event class list. For a discussion of the valid
    event class names, see XOpenDevice(3) This
    request uses the w argument to identify the destination window
    as follows:
      * If w is PointerWindow, the destination window is the window
        that contains the pointer.
      * 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,
    XSendExtensionEvent uses the propagate argument as follows:
      * If event_list 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.
      * If propagate is False, the event is sent to every client
        selecting on destination any of the event types specified by
        the event_list array.
      * If propagate is True and no clients have selected on
        destination any of the events specified by the event_list
        array, the destination is replaced with the closest ancestor
        of destination for which some client has selected a type
        specified by the event-list array 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 events specified in the event_list array.

    The event in the XEvent structure must be one of the events
    defined by the input 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.

    XSendExtensionEvent returns zero if the conversion to wire
    protocol format failed and returns nonzero
    otherwise. XSendExtensionEvent can generate BadClass, BadDevice,
    BadValue, and BadWindow errors.

# DIAGNOSTICS

    BadDevice
           An invalid device was specified. The specified device
           does not exist or has not been opened by this client via
           XOpenInputDevice. This error may also occur if the
           specified device is the X keyboard or X pointer device.

    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.

09/15/2021 |