/*******************************************************************************
* Copyright (c) 2000, 2015 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jface.dialogs;
/**
* Minimal interface to a page change provider. Used for dialogs which can
* switch between multiple pages.
*
* @since 3.1
*/
public interface IPageChangeProvider {
/**
* Returns the currently selected page in the dialog.
*
* @return the selected page in the dialog or <code>null</code> if none is
* selected. The type may be domain specific. In
* the JFace provided dialogs this will be an instance of
* <code>IDialogPage</code>.
*/
Object getSelectedPage();
/**
* Adds a listener for page changes in this page change provider. Has no
* effect if an identical listener is already registered.
*
* @param listener
* a page changed listener
*/
void addPageChangedListener(IPageChangedListener listener);
/**
* Removes the given page change listener from this page change provider.
* Has no effect if an identical listener is not registered.
*
* @param listener
* a page changed listener
*/
void removePageChangedListener(IPageChangedListener listener);
}