XISetClientPointer, XIGetClientPointer − set or get the ClientPointer device.
XIGetClientPointer( Display *display,
Specifies the connection to the X server.
Specifies a window belonging to the client. May be None.
Specifies the ClientPointer device.
ClientPointer is the device that is percieved to be the
core pointer for non−XI protocol requests and replies. Each
time a protocol message needs device−dependent data and the
device is not explicitly given, the ClientPointer device is
used to obtain the data. For example, a XQueryPointer request
will return the coordinates of the ClientPointer.
request sets the ClientPointer device for
the client that owns the given window. If win is None, the
requesting client´s ClientPointer is set to the device
specified with deviceid. Only master pointer devices can be set
and can generate a BadDevice and a BadWindow
XIGetClientPointer request returns the ClientPointer´s
device ID for the client that owns the given window. If win is
None, the requesting client´s ClientPointer is returned.
win may be a client ID instead of a window.
XIGetClientPointer can generate a BadWindow error.
An invalid device was specified. The device does not
exist or is not a master pointer device.
A value for a Window argument does not name a defined
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