Package be.ugent.caagt.swirl.undoredo

Provides a simple framework for registering and activating undoable (and redoable) actions with a central undo manager.

See:
Description

Interface Summary

UndoableChange	An object of this type describes the change made by an interactive command and provides sufficient information for that change to be undone and redone.
UndoListener	Listens to changes in the state of an UndoManager.

Class Summary

RedoAction	Action which reverts the last undo effected by the corresponding undo manager.
UndoAction	Action which undoes the last change registered with the corresponding undo manager.
UndoManager	Manages a list of changes of type UndoableChange.
UndoRedoAction	Common super class for UndoAction and RedoAction

Package be.ugent.caagt.swirl.undoredo Description

Provides a simple framework for registering and activating undoable (and redoable) actions with a central undo manager.

• Typically a set of windows will be associated with a single undo manager (of type UndoManager) which keeps track of all actions performed on objects in these windows.
• Such 'actions' must satisfy the interface UndoableChange.
• UndoAction and RedoAction can then be used to create undo and redo buttons (or menu items) which allow the user to undo the last change (or several changes) and then optionally redo the actions which were just undone.
• Other components can be notified of changes in the current undo/redo-state by registering an UndoListener with the undo manager.