/*******************************************************************************
* Copyright (c) 2007, 2014 compeople AG and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* compeople AG - initial API and implementation
*******************************************************************************/
package org.eclipse.riena.navigation;
/**
* Describes the ability of registering a NavigationHistoryListener.
*/
public interface INavigationHistoryListenerable {
/**
* Adds the given listener.
*
* @param pListener
* history listener to add
*/
void addNavigationHistoryListener(INavigationHistoryListener pListener);
/**
* Removes the given listener.
*
* @param pListener
* history listener to remove
*/
void removeNavigationHistoryListener(INavigationHistoryListener pListener);
/**
* Answer the current size of the next navigation history
*
* @return the amount of navigation nodes on the navigation stack
*/
int getHistoryBackSize();
/**
* Answer the current size of the forward navigation history
*
* @return the amount of navigation nodes on the navigation stack
*/
int getHistoryForwardSize();
}