/* * JBoss, Home of Professional Open Source * Copyright ${year}, Red Hat, Inc. and individual contributors * by the @authors tag. See the copyright.txt in the distribution for a * full listing of individual contributors. * * This is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * * This software 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this software; if not, write to the Free * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA, or see the FSF site: http://www.fsf.org. */ package org.richfaces.event; /** * @author akolonitsky * @since 2010-08-27 */ public interface PanelToggleSource { /** * <p> * Add a new {@link PanelToggleListener} to the set of listeners interested in being notified when {@link PanelToggleEvent}s * occur. * </p> * * @param listener The {@link PanelToggleListener} to be added * @throws NullPointerException if <code>listener</code> is <code>null</code> */ void addPanelToggleListener(PanelToggleListener listener); /** * <p> * Return the set of registered {@link PanelToggleListener}s for this instance. If there are no registered listeners, a * zero-length array is returned. * </p> */ PanelToggleListener[] getPanelToggleListeners(); /** * <p> * Remove an existing {@link PanelToggleListener} (if any) from the set of listeners interested in being notified when * {@link PanelToggleEvent}s occur. * </p> * * @param listener The {@link PanelToggleListener} to be removed * @throws NullPointerException if <code>listener</code> is <code>null</code> */ void removePanelToggleListener(PanelToggleListener listener); }