XQueryPointer(3X11) XLIB FUNCTIONS XQueryPointer(3X11)NAMEXQueryPointer - get pointer coordinates
SYNTAX
Bool XQueryPointer(display, w, root_return, child_return,
root_x_return, root_y_return,
win_x_return, win_y_return,
mask_return)
Display *display;
Window w;
Window *root_return, *child_return;
int *root_x_return, *root_y_return;
int *win_x_return, *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 rela-
tive 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, XQuery-
Pointer returns the child that contains the pointer, if
any, or else None to child_return.
X Version 11 Release 6.4 1
XQueryPointer(3X11) XLIB FUNCTIONS XQueryPointer(3X11)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.
SEE ALSOXGetWindowAttributes(3X11), XQueryTree(3X11)
Xlib - C Language X Interface
X Version 11 Release 6.4 2