RedoMenuItem.java

/*
 * Copyright 2016 Laszlo Balazs-Csiki
 *
 * This file is part of Pixelitor. Pixelitor is free software: you
 * can redistribute it and/or modify it under the terms of the GNU
 * General Public License, version 3 as published by the Free
 * Software Foundation.
 *
 * Pixelitor 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 Pixelitor. If not, see <http://www.gnu.org/licenses/>.
 */
package pixelitor.menus.edit;

import pixelitor.history.History;

import javax.swing.*;
import javax.swing.event.UndoableEditEvent;
import javax.swing.event.UndoableEditListener;

/**
 * The "Edit/Redo" menu item
 */
public class RedoMenuItem extends JMenuItem implements UndoableEditListener {
    public RedoMenuItem(Action a) {
        super(a);

        assert a == History.REDO_ACTION;

        History.addUndoableEditListener(this);
        setEnabled(false);
    }

    @Override
    public void undoableEditHappened(UndoableEditEvent e) {
        setEnabled(History.canRedo());
        getAction().putValue(Action.NAME, History.getRedoPresentationName());
    }
}