问题
I want to get the top most window that is at position x and y. In Winapi I do this with WindowFromPoint seen here: https://msdn.microsoft.com/en-us/library/ms633558%28v=vs.85%29.aspx
Is there any equivalent in x11? I have covered the entire screen with a window and i want to know all the windows that are at the point in z order.
回答1:
XQueryTree gives list of window in the stacking order. You would need to query dimensions for every window in the list and stop when your point is within rectangle
来源：https://stackoverflow.com/questions/31712876/with-x11-get-window-at-coordinates