4f1f226828
Use StWidget:track-hover rather than doing it ourselves. Don't assume that hover is always TRUE after an enter_event or FALSE after a leave_event, since we have a pointer grab and will be getting other actors' events. Don't ungrab the pointer when it leaves the button, since that destroys the whole point of getting a grab in the first place. Only consider the button to have been clicked when it has both grab (meaning the mouse was pressed over the button) and hover (meaning the mouse was released over the button). Also remove the virtual pressed/released methods, which weren't being used anyway. https://bugzilla.gnome.org/show_bug.cgi?id=633853
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