xcb_button_press_event_t(3) XCB Events xcb_button_press_event_t(3)NAME
xcb_button_press_event_t - a mouse button was pressed/released
SYNOPSIS
#include <xcb/xproto.h>
Event datastructure
typedef struct xcb_button_press_event_t {
uint8_t response_type;
xcb_button_t detail;
uint16_t sequence;
xcb_timestamp_t time;
xcb_window_t root;
xcb_window_t event;
xcb_window_t child;
int16_t root_x;
int16_t root_y;
int16_t event_x;
int16_t event_y;
uint16_t state;
uint8_t same_screen;
uint8_t pad0;
} xcb_button_press_event_t;
EVENT FIELDS
response_type
The type of this event, in this case XCB_BUTTON_PRESS. This field is also present in the xcb_generic_event_t and can be used to
tell events apart from each other.
sequence The sequence number of the last request processed by the X11 server.
detail The keycode (a number representing a physical key on the keyboard) of the key which was pressed.
time Time when the event was generated (in milliseconds).
root The root window of child.
event NOT YET DOCUMENTED.
child NOT YET DOCUMENTED.
root_x The X coordinate of the pointer relative to the root window at the time of the event.
root_y The Y coordinate of the pointer relative to the root window at the time of the event.
event_x If same_screen is true, this is the X coordinate relative to the event window's origin. Otherwise, event_x will be set to zero.
event_y If same_screen is true, this is the Y coordinate relative to the event window's origin. Otherwise, event_y will be set to zero.
state The logical state of the pointer buttons and modifier keys just prior to the event.
same_screen
Whether the event window is on the same screen as the root window.
DESCRIPTION SEE ALSO xcb_generic_event_t(3), xcb_grab_pointer(3), xcb_grab_button(3)AUTHOR
Generated from xproto.xml. Contact xcb@lists.freedesktop.org for corrections and improvements.
XCB 2014-06-10 xcb_button_press_event_t(3)
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xcb_query_pointer(3) XCB Requests xcb_query_pointer(3)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.
DESCRIPTION
Gets the root window the pointer is logically on and the pointer coordinates relative to the root window's origin.
RETURN VALUE
Returns an xcb_query_pointer_cookie_t. Errors have to be handled when calling the reply function xcb_query_pointer_reply.
If you want to handle errors in the event loop instead, use xcb_query_pointer_unchecked. See xcb-requests(3) for details.
ERRORS
xcb_window_error_t
The specified window does not exist.
SEE ALSO xcb-requests(3)AUTHOR
Generated from xproto.xml. Contact xcb@lists.freedesktop.org for corrections and improvements.
XCB 2014-06-10 xcb_query_pointer(3)