The manager gets event per event from the control-device. These events can be of different types, for example graphic- or control redraw, user-actions like mouse and keyboard and so on. The manager will start the necessary action. If the event was a user-event like mouse or keyboard, the manager will search the concerned item and call its handle-event method. These different methods of the handle classes will handle the event and they must not wait for the next event, because then the will lock the event queue and redraw events can't be handled correctly.
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