XCHANGEPOINTERDEVICE(3)

NAME
XChangePointerDevice - change which device is the X pointer

SYNOPSIS

#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.

DESCRIPTION

    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.

DIAGNOSTICS

    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.

SEE ALSO

    XChangeKeyboardDevice(3)