XISETCLIENTPOINTER - Online Linux Manual PageSection : 3
Updated : 09/15/2021
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NAMEXISetClientPointer, XIGetClientPointer − set or get the ClientPointer device​.

SYNOPSIS#include <X11/extensions/XInput2​.h>XISetClientPointer( Display *display, Window win, int deviceid);Bool XIGetClientPointer( Display *display, Window win, int *device);display Specifies the connection to the X server​.win Specifies a window belonging to the client​. May be None​.deviceid Specifies the ClientPointer device​.

DESCRIPTIONThe ClientPointer is the device that is perceived 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​.XISetClientPointer 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 as ClientPointer​.XISetClientPointer and can generate a BadDevice and a BadWindow error​.The 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​.

DIAGNOSTICSBadDevice An invalid device was specified​. The device does not exist or is not a master pointer device​.BadWindow A value for a Window argument does not name a defined window​.
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