001/* ItemSelectable.java -- items that can be selected 002 Copyright (C) 1999, 2002, 2005 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038 039package java.awt; 040 041import java.awt.event.ItemListener; 042 043/** 044 * This interface is for objects that can have one or more items selected. 045 * For example, radio buttons. 046 * 047 * @author Aaron M. Renn (arenn@urbanophile.com) 048 * @since 1.0 049 * @status updated to 1.4 050 */ 051public interface ItemSelectable 052{ 053 /** 054 * Returns the list of objects that are selected in this component. 055 * 056 * @return the list of selected objects, or null 057 */ 058 Object[] getSelectedObjects(); 059 060 /** 061 * Adds an item listener to this object. It will receive selection events 062 * for this object by the user (but not programatically). If listener is 063 * null, it is ignored. 064 * 065 * @param listener the item listener to add 066 */ 067 void addItemListener(ItemListener listener); 068 069 /** 070 * Removes an item listener from this object. 071 * 072 * @param listener the item listener to remove 073 */ 074 void removeItemListener(ItemListener listener); 075} // interface ItemSelectable