151 lines
4.1 KiB
C
151 lines
4.1 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/* $XConsortium: CmdList.C /main/3 1995/11/06 15:59:50 rswiston $ */
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/*
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*+SNOTICE
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*
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* RESTRICTED CONFIDENTIAL INFORMATION:
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*
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* The information in this document is subject to special
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* restrictions in a confidential disclosure agreement bertween
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* HP, IBM, Sun, USL, SCO and Univel. Do not distribute this
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* document outside HP, IBM, Sun, USL, SCO, or Univel wihtout
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* Sun's specific written approval. This documment and all copies
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* and derivative works thereof must be returned or destroyed at
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* Sun's request.
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*
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* Copyright 1993 Sun Microsystems, Inc. All rights reserved.
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*
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*+ENOTICE
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*/
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///////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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// This example code is from the book:
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//
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// Object-Oriented Programming with C++ and OSF/Motif
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// by
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// Douglas Young
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// Prentice Hall, 1992
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// ISBN 0-13-630252-1
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//
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// Copyright 1991 by Prentice Hall
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// All Rights Reserved
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//
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// Permission to use, copy, modify, and distribute this software for
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// any purpose except publication and without fee is hereby granted, provided
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// that the above copyright notice appear in all copies of the software.
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///////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////
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// CmdList.C: Maintain a list of Cmd objects
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////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////
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// MODIFIED TO INHERIT FROM CMD - not described in Book
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///////////////////////////////////////////////////////////
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#include "CmdList.h"
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CmdList::CmdList() : Cmd("CmdList", "CmdList", 1)
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{
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_contents = 0;
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_numElements = 0;
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_pane = NULL;
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}
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CmdList::CmdList(char *name, char *label ) : Cmd(name, label, 1)
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{
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// The list is initially empty
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_contents = 0;
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_numElements = 0;
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_pane = NULL;
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}
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CmdList::~CmdList()
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{
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// free the list
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delete []_contents;
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}
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void CmdList::add ( Cmd *cmd )
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{
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int i;
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Cmd **newList;
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// CmdList can only be undone if all Cmds it contains can be undone
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if(!cmd->hasUndo())
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_hasUndo = 0;
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// Allocate a list large enough for one more element
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newList = new Cmd*[_numElements + 1];
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// Copy the contents of the previous list to
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// the new list
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for( i = 0; i < _numElements; i++)
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newList[i] = _contents[i];
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// Free the old list
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if (_contents)
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delete []_contents;
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// Make the new list the current list
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_contents = newList;
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// Add the command to the list and update the list size.
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_contents[_numElements] = cmd;
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_numElements++;
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}
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Cmd *CmdList::operator[] ( int index )
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{
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// Return the indexed element
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return _contents[index];
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}
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void CmdList::doit()
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{
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for( int i = 0; i < _numElements; i++)
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_contents[i]->execute();
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}
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void CmdList::undoit()
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{
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if(_hasUndo)
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for( int i = _numElements - 1; i >=0; i--)
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_contents[i]->undo();
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}
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