01: package net.sourceforge.squirrel_sql.client.session.action;
02:
03: /*
04: * Copyright (C) 2001-2003 Johan Compagner
05: *
06: * This library is free software; you can redistribute it and/or
07: * modify it under the terms of the GNU Lesser General Public
08: * License as published by the Free Software Foundation; either
09: * version 2.1 of the License, or (at your option) any later version.
10: *
11: * This library is distributed in the hope that it will be useful,
12: * but WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * Lesser General Public License for more details.
15: *
16: * You should have received a copy of the GNU Lesser General Public
17: * License along with this library; if not, write to the Free Software
18: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19: */
20: import java.awt.event.ActionEvent;
21:
22: import javax.swing.undo.UndoManager;
23:
24: import net.sourceforge.squirrel_sql.client.IApplication;
25: import net.sourceforge.squirrel_sql.client.action.SquirrelAction;
26:
27: public class UndoAction extends SquirrelAction {
28: private UndoManager _undo;
29:
30: public UndoAction(IApplication app, UndoManager undo) {
31: super (app);
32: if (undo == null) {
33: throw new IllegalArgumentException("UndoManager == null");
34: }
35: _undo = undo;
36: }
37:
38: /*
39: * @see ActionListener#actionPerformed(ActionEvent)
40: */
41: public void actionPerformed(ActionEvent e) {
42: if (_undo.canUndo()) {
43: _undo.undo();
44: }
45: }
46: }
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