Constant xcb::ffi::xproto::XCB_INPUT_FOCUS_POINTER_ROOT

pub const XCB_INPUT_FOCUS_POINTER_ROOT: xcb_input_focus_t = 0x01;

The focus reverts to XCB_POINTER_ROOT respectively. When the focus reverts, FocusIn and FocusOut events are generated, but the last-focus-change time is not changed.