QMenu : two QEvents are sent for enterEvent and leaveEvent

In Windows, moving the mouse over a QMenu will generate two enter events and moving the mouse out of the menu will send two leave events. Also,. with tear-off enabled, going over the tear-off bar will trigger the first enter event and moving on the menu will generate the second.

If a sub menu is tear-off-able, moving the mouse over the tear-off bar (without entering the sub-menu) will generate a leave event on the first menu and will close the sub-menu.

On Mac and Linux, no enter event is generated when going over the tear-off bar, the enter event is only generated when going over the sub-menu's items also triggering the a leave event for the main menu. Contrarily to Windows leaving the mouse over the tear-off bar will not close the sub-menu.

Attached a simple test case