XQueryPointer - get pointer coordinates
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);
- 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.
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.
- BadWindow
- A value for a Window argument does not name a defined Window.
XGetWindowAttributes(3), XQueryTree(3)
Xlib - C Language X Interface