NAME
SYNOPSIS
DESCRIPTION
DIAGNOSTICS
SEE ALSO
XChangePointerDevice − change which device is the X pointer
#include <X11/extensions/XInput.h>
Status
XChangePointerDevice( Display *display,
XDevice *device,
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 implementation 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 MappingNotify
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 keyboard). This error may also occur
if the server implementation does not support using the
specified device as the X pointer.
BadMatch
This error may occur if an XChangePointerDevice request
was made specifying a device that has less than two
valuators, or specifying a valuator index beyond the
range supported by the device.