It can happen that there is a window covering all the screen but it is shaped
to only take part of the screen. If that happens, besides the condition of
QRect(attr.x,attr.y,attr.width,attr.height).contains(pos)
we also need to query the server for its region rectangles and make
sure the cursor is inside one of those rectangles. If that does not happen
we have to return 0 so the hierarchical xcb_query_tree_children xcb_query_tree_childrenntinues
Change-Id: I67327672e3d854d064190b55a07bd56ade4dfddb
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Reviewed-by: Uli Schlachter <psychon@znc.in>
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>
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