[This is preliminary documentation and subject to change.]

Implements undo/redo services for object graphs that generate change notification events by means of the IChangeEventSource interface contract.

For a list of all members of this type, see UndoEngine Members.

System.Object
   LaMarvin.ComponentModel.UndoEngine

Thread Safety

Public static (Shared in Visual Basic) members of this type are safe for multithreaded operations. Instance members are not guaranteed to be thread-safe.

Remarks

The UndoEngine class is associated with an object graph by setting the RootInstance property. After setting the property, the UndoEngine instance listens to change notification events, records them in a form of a collection of ChangeUndoManager-derived instances and allows for undoing and/or redoing the changes upon request.

The UndoEngine allows also grouping a set of individual changes to form one logical change by enclosing the set of changes within the BeginUndoGroup/CommitUndoGroup method calls.

Note The UndoEngine itself doesn't understand how to undo/redo individual changes. Instead, it asks the ChangeEventArgs-derived event arguments to create a corresponding ChangeUndoManager instance, that is stored and subsequently used to undo/redo the change.

Requirements

Namespace: LaMarvin.ComponentModel

Assembly: LaMarvin.Common (in LaMarvin.Common.dll)

See Also

UndoEngine Members | LaMarvin.ComponentModel Namespace

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