XChangePointerDevice(3X11) X FUNCTIONS XChangePointerDevice(3X11)
XChangePointerDevice - change which device is the X pointer
Status XChangePointerDevice(Display *display, XDevice *dev-
ice, int xaxis, int yaxis);
display Specifies the connection to the X server.
device Specifies the device to be used as the X
pointer.
xaxis Specifies the axis of the device to be used as
the X pointer x-axis.
yaxis Specifies the axis of the device to be used as
the X pointer y-axis.
The XChangePointerDevice request causes the server to use
the specified device as the X pointer. The device must have
been opened by the client via XOpenDevice or a BadDevice
error will result. The device must support input class
Valuators or a BadMatch error will result. If the implemen-
tation does not support use of the specified device as the X
pointer, a BadDevice error will result.
If the specified device is grabbed by another client,
AlreadyGrabbed is returned. If the specified device is
frozen by a grab on another device, GrabFrozen is returned.
If the request is successful, Success is returned.
If the request succeeds, a ChangeDeviceNotify event is sent
to all clients that have selected that event. A MappingNo-
tify event with request = MappingPointer is sent to all
clients. The specified device becomes the X pointer, and the
old X pointer becomes accessible through the input extension
protocol requests.
XChangePointerDevice can generate a BadDevice or a BadMatch
error.
BadDevice An invalid device was specified. The specified
device does not exist, has not been opened by
this client via XOpenInputDevice, or is already
one of the core X input devices (pointer or key-
board). This error may also occur if the server
implementation does not support using the speci-
fied device as the X pointer.
XFree86 Version 4.5.0 1
XChangePointerDevice(3X11) X FUNCTIONS XChangePointerDevice(3X11)
BadMatch This error may occur if an XChangePointerDevice
request was made specifying a device that has
less than two valuators, or specifying a valua-
tor index beyond the range supported by the dev-
ice.
XChangeKeyboardDevice
Programming With Xlib
XFree86 Version 4.5.0 2
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