org.pmedv.blackboard.commands.RedoCommand.java Source code

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Here is the source code for org.pmedv.blackboard.commands.RedoCommand.java

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/**
    
   BlackBoard breadboard designer
   Written and maintained by Matthias Pueski 
       
   Copyright (c) 2010-2011 Matthias Pueski
       
   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.
    
 */
package org.pmedv.blackboard.commands;

import java.awt.event.ActionEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;

import javax.swing.Action;
import javax.swing.KeyStroke;
import javax.swing.undo.CannotRedoException;
import javax.swing.undo.UndoManager;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.pmedv.blackboard.EditorUtils;
import org.pmedv.blackboard.components.BoardEditor;
import org.pmedv.blackboard.events.EditorChangedEvent;
import org.pmedv.blackboard.events.EditorChangedListener;
import org.pmedv.core.commands.AbstractCommand;
import org.pmedv.core.context.AppContext;
import org.springframework.context.ApplicationContext;

public class RedoCommand extends AbstractCommand implements EditorChangedListener {

    private static final long serialVersionUID = -3761492937412800675L;
    private static final Log log = LogFactory.getLog(RedoCommand.class);

    public RedoCommand() {
        putValue(Action.NAME, resources.getResourceByKey("RedoCommand.name"));
        putValue(Action.SMALL_ICON, resources.getIcon("icon.redo"));
        putValue(Action.SHORT_DESCRIPTION, resources.getResourceByKey("RedoCommand.description"));
        putValue(Action.ACCELERATOR_KEY, KeyStroke.getKeyStroke(KeyEvent.VK_Y, InputEvent.CTRL_DOWN_MASK));
        setEnabled(false);
    }

    @Override
    public void execute(ActionEvent e) {

        ApplicationContext ctx = AppContext.getContext();
        BoardEditor editor = EditorUtils.getCurrentActiveEditor();
        UndoManager undoManager = editor.getUndoManager();

        try {
            undoManager.redo();
        } catch (CannotRedoException r) {
            log.warn("Cannot redo.");
        }

        ctx.getBean(RedoCommand.class).setEnabled(undoManager.canRedo());
        ctx.getBean(UndoCommand.class).setEnabled(undoManager.canUndo());

    }

    @Override
    public void editorChanged(EditorChangedEvent event) {

        if (event.getEditor() == null) {
            setEnabled(false);
        } else {
            setEnabled(event.getEditor().getUndoManager().canRedo());
        }

    }

}