package com.exigen.ie.constrainer.impl;
import com.exigen.ie.constrainer.Constrainer;
import com.exigen.ie.constrainer.ConstrainerObjectImpl;
import com.exigen.ie.constrainer.Undo;
import com.exigen.ie.constrainer.Undoable;
///////////////////////////////////////////////////////////////////////////////
/*
* Copyright Exigen Group 1998, 1999, 2000
* 320 Amboy Ave., Metuchen, NJ, 08840, USA, www.exigengroup.com
*
* The copyright to the computer program(s) herein
* is the property of Exigen Group, USA. All rights reserved.
* The program(s) may be used and/or copied only with
* the written permission of Exigen Group
* or in accordance with the terms and conditions
* stipulated in the agreement/contract under which
* the program(s) have been supplied.
*/
///////////////////////////////////////////////////////////////////////////////
/**
* An implementation of the Undoable interface for the undoable only once object.
*/
public abstract class UndoableOnceImpl extends ConstrainerObjectImpl implements Undoable
{
protected boolean _undone;
/**
* Constructor with a given constrainer and name.
*/
public UndoableOnceImpl(Constrainer c, String name)
{
super(c,name);
_undone = false;
}
/**
* Constructor with a given constrainer.
*/
public UndoableOnceImpl(Constrainer c)
{
this(c,"");
}
public final boolean undone()
{
return _undone;
//return false;
}
public final void undone(boolean b)
{
_undone = b;
}
public final void restore()
{
_undone = false;
}
public void addUndo()
{
if (!_undone)
{
_undone = true;
Undo undo_object = createUndo();
undo_object.undoable(this);
//Debug.on();Debug.print("add " + undo_object);Debug.off();
// constrainer().addUndo(undo_object);
constrainer().addUndo(undo_object,this);
}
}
} // ~UndoableOnceImpl