undoactionhandler.java

思维导图(Mind Mapping)以放射性思考(Radiant Thinking)为基础的收放自如方式

/*FreeMind - A Program for creating and viewing Mindmaps
 *Copyright (C) 2000-2004  Joerg Mueller, Daniel Polansky, Christian Foltin and others.
 *
 *See COPYING for Details
 *
 *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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Created on 23.09.2004
 */
/*$Id: UndoActionHandler.java,v 1.1.4.1 2004/10/17 23:00:07 dpolivaev Exp $*/

package freemind.controller.actions;

import freemind.controller.actions.generated.instance.UndoXmlAction;
import freemind.modes.ModeController;
import freemind.modes.actions.RedoAction;
import freemind.modes.actions.UndoAction;


public class UndoActionHandler implements ActionHandler {
    private ModeController controller;
    private final UndoAction undo;
    private final RedoAction redo;

    /**
     * @param adapter
     * @param redo
     * @param undo
     */
    public UndoActionHandler(ModeController adapter, UndoAction undo, RedoAction redo) {
        this.controller = adapter;
        this.undo = undo;
        this.redo = redo;
    }

    public void executeAction(ActionPair pair) {
    	if(! controller.isUndoAction() ) {
    		if(! (pair.getDoAction() instanceof UndoXmlAction)) {
    			redo.clear();
    			undo.add(pair);
    			//undo.print();
    			undo.setEnabled(true);
    			redo.setEnabled(false);
    		}
    	}
    }

    public void startTransaction(String name) {
    }

    public void endTransaction(String name) {
    }
}