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You are here: manpages

xcb_query_pointer

Section: XCB Requests (3)
Updated: libxcb 1.12
Index Return to Main Contents

NAME

xcb_query_pointer - get pointer coordinates

SYNOPSIS

#include <xcb/xproto.h>

Request function

: xcb_query_pointer_cookie_t xcb_query_pointer(xcb_connection_t *conn, xcb_window_t window);

Reply datastructure


typedef struct xcb_query_pointer_reply_t {
    uint8_t      response_type;
    uint8_t      same_screen;
    uint16_t     sequence;
    uint32_t     length;
    xcb_window_t root;
    xcb_window_t child;
    int16_t      root_x;
    int16_t      root_y;
    int16_t      win_x;
    int16_t      win_y;
    uint16_t     mask;
    uint8_t      pad0[2];
} xcb_query_pointer_reply_t;

Reply function

: xcb_query_pointer_reply_t *xcb_query_pointer_reply(xcb_connection_t *conn, xcb_query_pointer_cookie_t cookie, xcb_generic_error_t **e);

REQUEST ARGUMENTS

conn: The XCB connection to X11.
window: A window to check if the pointer is on the same screen as window (see the same_screen field in the reply).

REPLY FIELDS

response_type: The type of this reply, in this case XCB_QUERY_POINTER. This field is also present in the xcb_generic_reply_t and can be used to tell replies apart from each other.
sequence: The sequence number of the last request processed by the X11 server.
length: The length of the reply, in words (a word is 4 bytes).
same_screen: If same_screen is False, then the pointer is not on the same screen as the argument window, child is None, and win_x and win_y are zero. If same_screen is True, then win_x and win_y are the pointer coordinates relative to the argument window's origin, and child is the child containing the pointer, if any.
root: The root window the pointer is logically on.
child: The child window containing the pointer, if any, if same_screen is true. If same_screen is false, XCB_NONE is returned.
root_x: The pointer X position, relative to root.
root_y: The pointer Y position, relative to root.
win_x: The pointer X coordinate, relative to child, if same_screen is true. Zero otherwise.
win_y: The pointer Y coordinate, relative to child, if same_screen is true. Zero otherwise.
mask: The current logical state of the modifier keys and the buttons. Note that the logical state of a device (as seen by means of the protocol) may lag the physical state if device event processing is frozen.