Интерактивная система просмотра системных руководств (man-ов)
XQueryPointer (3)
>> XQueryPointer (3) ( Разные man: Библиотечные вызовы )
NAME
XQueryPointer - get pointer coordinates
SYNTAX
Bool XQueryPointer(Display *display, Window w, Window
*root_return, Window *child_return, int
*root_x_return, int *root_y_return, int *win_x_return,
int *win_y_return, unsigned int *mask_return);
ARGUMENTS
child_return
Returns the child window that the pointer is located in, if any.
display
Specifies the connection to the X server.
mask_return
Returns the current state of the modifier keys and pointer buttons.
root_return
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.
w
Specifies the window.
win_x_return
win_y_return
Return the pointer coordinates relative to the specified window.
DESCRIPTION
The
XQueryPointer
function returns the root window the pointer is logically on and the pointer
coordinates relative to the root window's origin.
If
XQueryPointer
returns
False,
the pointer is not on the same screen as the specified window, and
XQueryPointer
returns
None
to child_return and zero to win_x_return and win_y_return.
If
XQueryPointer
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,
XQueryPointer
returns the child that contains the pointer, if any,
or else
None
to child_return.
XQueryPointer
returns the current logical state of the keyboard buttons
and the modifier keys in mask_return.
It sets mask_return to the bitwise inclusive OR of one or more
of the button or modifier key bitmasks to match
the current state of the mouse buttons and the modifier keys.
XQueryPointer
can generate a
BadWindow
error.
DIAGNOSTICS
BadWindow
A value for a Window argument does not name a defined Window.
