/* ******************************************************************************
* Copyright (c) 2006-2012 XMind Ltd. and others.
*
* This file is a part of XMind 3. XMind releases 3 and
* above are dual-licensed under the Eclipse Public License (EPL),
* which is available at http://www.eclipse.org/legal/epl-v10.html
* and the GNU Lesser General Public License (LGPL),
* which is available at http://www.gnu.org/licenses/lgpl.html
* See http://www.xmind.net/license.html for details.
*
* Contributors:
* XMind Ltd. - initial API and implementation
*******************************************************************************/
package org.xmind.gef.ui.editor;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.dialogs.IPageChangedListener;
import org.eclipse.jface.dialogs.PageChangedEvent;
public abstract class PageContainerPresentationBase implements
IPageContainerPresentation {
private List<IPageChangedListener> pageChangedListeners = null;
public void addPageChangedListener(IPageChangedListener listener) {
if (listener == null)
return;
if (pageChangedListeners == null)
pageChangedListeners = new ArrayList<IPageChangedListener>();
pageChangedListeners.add(listener);
}
protected boolean hasListener() {
return pageChangedListeners != null && !pageChangedListeners.isEmpty();
}
public void removePageChangedListener(IPageChangedListener listener) {
if (pageChangedListeners == null)
return;
pageChangedListeners.remove(listener);
}
protected void firePageChangedEvent() {
if (pageChangedListeners == null)
return;
PageChangedEvent event = new PageChangedEvent(this, getSelectedPage());
for (Object listener : pageChangedListeners.toArray()) {
((IPageChangedListener) listener).pageChanged(event);
}
}
}