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There is a newer version: 1.18.1

package editor.undo;

import javax.swing.event.ChangeEvent;
import javax.swing.undo.UndoableEdit;

public class UndoChangeEvent extends ChangeEvent
{
  private UndoableEdit _edit;
  private ChangeType _type;

  public enum ChangeType
  {
    ADD_EDIT,
    UNDO,
    REDO,
    UNDO_OR_REDO,
    UNDO_TO,
    REDO_TO,
  }

  public UndoChangeEvent( AtomicUndoManager atomicUndoManager, ChangeType type, UndoableEdit edit )
  {
    super( atomicUndoManager );
    _edit = edit;
    _type = type;
  }

  @SuppressWarnings("UnusedDeclaration")
  public UndoableEdit getEdit()
  {
    return _edit;
  }

  public ChangeType getType()
  {
    return _type;
  }
}