Need to split user and system processing of events

Name: az76091 Date: 07/23/2004


For the purpose of separation of system and user processing of event it will be
nice to have three stages of event processing: pre-processing (when system can
filter events or provide immediate user feedback), processing (when user-defined
listeners will actually receive event) and post-processing (when system can work
on event that possibly modified by user action).

Similar separation already done in KeyboardFocusManager for KeyEvents but this
should be extended to other types of event and made more general.

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