/*
 * IzPack - Copyright 2001-2012 Julien Ponge, All Rights Reserved.
 *
 * http://izpack.org/
 * http://izpack.codehaus.org/
 *
 * Copyright 2012 Tim Anderson
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.izforge.izpack.installer.gui;

/**
 * Listener for {@link IzPanels} events.
 *
 * @author Tim Anderson
 */
public interface IzPanelsListener
{
    /**
     * Invoked to switch panels.
     *
     * @param newPanel the panel to switch to
     * @param oldPanel the panel to switch from, or {@code null} if there was no prior panel
     */
    void switchPanel(IzPanelView newPanel, IzPanelView oldPanel);

}