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ED defines 4 custom events,
The main job of these custom events seems to define constant (say public static const COMPLETE : String = “complete”;). Although CommandCompleteEvent and CommandProgressEvent also include a variable “command” which stores the command which dispatch the event, I don’t see ED uses this information (Except in CommandProgressEvent, this Event can retrieve the progress and progressMessage of the corresponding command).
The only class which dispatches SelectedItemChangeEvent is ApplicationModel. The only place where this event is listened is MainContentContainer. Although SelectedItemChangeEvent has variable “item”, again it seems not to be used. ApplicationModel holds a copy of “item” and it is this copy that is used.