QItemDelegate and QStyledItemDelegate had this exact implementation already, the actual code being in QAbstractItemDelegatePrivate. If someone writes their own delegate by deriving from QAbstractItemDelegate, they had no way to call the default event filter code (to get Enter to commit, Esc to abort editing etc.). [ChangeLog][QtWidgets][QAbstractItemDelegate] The base class now provides a handleEditorEvent() method, which provides the same event handling as in QItemDelegate and QStyledItemDelegate, including Tab, Enter, Esc keys and focus out handling. Change-Id: I1b560d8a1b348e3b3bb5cfc3162f9b265b706684 Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>