9f19ca68b3
Only window created with CS_DBLCLKS style can receive those mouse double click events, so we need to use the style for internal/external windows can get double click events. Also, passthrough mouse events to parent window in the same message pumping threads instead of manually forwarding each mouse event. Fixes: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/1172 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2277>