/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* Copyable.java
* Copyright (C) 2005 University of Waikato, Hamilton, New Zealand
*
*/
package weka.core;
/**
* Interface implemented by classes that support undo.
*
* @author FracPete (fracpete at waikato dot ac dot nz)
* @version $Revision: 5953 $
*/
public interface Undoable {
/**
* returns whether undo support is enabled
*/
public boolean isUndoEnabled();
/**
* sets whether undo support is enabled
*/
public void setUndoEnabled(boolean enabled);
/**
* removes the undo history
*/
public void clearUndo();
/**
* returns whether an undo is possible, i.e. whether there are any undo points
* saved so far
*
* @return returns TRUE if there is an undo possible
*/
public boolean canUndo();
/**
* undoes the last action
*/
public void undo();
/**
* adds an undo point to the undo history
*/
public void addUndoPoint();
}