2 * CDE - Common Desktop Environment
4 * Copyright (c) 1993-2012, The Open Group. All rights reserved.
6 * These libraries and programs are free software; you can
7 * redistribute them and/or modify them under the terms of the GNU
8 * Lesser General Public License as published by the Free Software
9 * Foundation; either version 2 of the License, or (at your option)
12 * These libraries and programs are distributed in the hope that
13 * they will be useful, but WITHOUT ANY WARRANTY; without even the
14 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 * PURPOSE. See the GNU Lesser General Public License for more
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with these librararies and programs; if not, write
20 * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
21 * Floor, Boston, MA 02110-1301 USA
23 /* $XConsortium: UndoCmd.C /main/3 1995/11/06 16:02:46 rswiston $ */
27 * RESTRICTED CONFIDENTIAL INFORMATION:
29 * The information in this document is subject to special
30 * restrictions in a confidential disclosure agreement bertween
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37 * Copyright 1993 Sun Microsystems, Inc. All rights reserved.
41 ///////////////////////////////////////////////////////////////////////////////
42 //////////////////////////////////////////////////////////////////////////////
43 // This example code is from the book:
45 // Object-Oriented Programming with C++ and OSF/Motif
48 // Prentice Hall, 1992
51 // Copyright 1991 by Prentice Hall
52 // All Rights Reserved
54 // Permission to use, copy, modify, and distribute this software for
55 // any purpose except publication and without fee is hereby granted, provided
56 // that the above copyright notice appear in all copies of the software.
57 ///////////////////////////////////////////////////////////////////////////////
58 //////////////////////////////////////////////////////////////////////////////
61 //////////////////////////////////////////////////////////
62 // UndoCmd.C: An interface to undoing the last command
63 //////////////////////////////////////////////////////////
68 // Declare a global object: theUndoCmd
70 UndoCmd *theUndoCmd = new UndoCmd ( "Undo", "Undo" );
72 UndoCmd::UndoCmd ( char *name, char *label ) : NoUndoCmd ( name, label, 0 )
79 // If there is a current command, undo it
81 if ( _lastCmd != NULL )
83 // Undo the previous command
87 _lastCmd = NULL; // Make sure we can't undo twice