XIQueryPointer − get device pointer coordinates.


#include <X11/extensions/XInput2.h>

Bool XIQueryPointer( Display *display,
int deviceid,
Window win,
Window *root_return,
Window *child_return,
double *root_x_return,
double *root_y_return,
double *win_x_return,
double *win_y_return,
XIButtonState *buttons_return,
XIModifierState *modifiers_return,
XIGroupState *group_return);

Returns the current button state.

Returns the child window that the pointer is located in,
if any.

Specifies the device to query.

Specifies the connection to the X server.

Returns the current group state.

Returns the current state of the modifier keys.

Returns the root window that the pointer is in.

root_x_return, root_y_return
Return the pointer coordinates relative to the root
window´s origin.

Specifies the window.

win_x_return, win_y_return
Return the pointer coordinates relative to the specified


The XIQueryPointer function returns the root window the
device´s pointer is logically on and the pointer coordinates
relative to the root window´s origin. If XIQueryPointer returns
False, the pointer is not on the same screen as the specified
window, and XIQueryPointer returns None to child_return and
zero to win_x_return and win_y_return. If XIQueryPointer
returns True, the pointer coordinates returned to win_x_return
and win_y_return are relative to the origin of the specified
window. In this case, XIQueryPointer returns the child that
contains the pointer, if any, or else None to child_return.

XIQueryPointer returns the current logical state of the buttons
buttons_return. The keyboard paired with the master pointer is
selected to obtain the data for modifiers_return and

XIQueryPointer is identical to XQueryPointer but specifies the
device explicitly.

XIQueryPointer can generate a BadDevice and a BadWindow error.


An invalid device was specified. The device does not
exist or is not a pointer device.

A value for a Window argument does not name a defined




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