XChangePointerDevice(3X11) SDK X11 R4.11MU05 XChangePointerDevice(3X11)
NAME
XChangePointerDevice - change which device is the X pointer
SYNTAX
Status XChangePointerDevice(display, device xaxis, yaxis)
Display *display;
XDevice *device;
int xaxis;
int yaxis;
ARGUMENTS
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
Programming With Xlib
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