1/* 2 * Copyright (c) 1997, 2002, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package javax.swing; 27 28import javax.swing.event.*; 29 30/** 31 * A model that supports at most one indexed selection. 32 * 33 * @author Dave Moore 34 * @since 1.2 35 */ 36public interface SingleSelectionModel { 37 /** 38 * Returns the model's selection. 39 * 40 * @return the model's selection, or -1 if there is no selection 41 * @see #setSelectedIndex 42 */ 43 public int getSelectedIndex(); 44 45 /** 46 * Sets the model's selected index to <I>index</I>. 47 * 48 * Notifies any listeners if the model changes 49 * 50 * @param index an int specifying the model selection 51 * @see #getSelectedIndex 52 * @see #addChangeListener 53 */ 54 public void setSelectedIndex(int index); 55 56 /** 57 * Clears the selection (to -1). 58 */ 59 public void clearSelection(); 60 61 /** 62 * Returns true if the selection model currently has a selected value. 63 * @return true if a value is currently selected 64 */ 65 public boolean isSelected(); 66 67 /** 68 * Adds <I>listener</I> as a listener to changes in the model. 69 * @param listener the ChangeListener to add 70 */ 71 void addChangeListener(ChangeListener listener); 72 73 /** 74 * Removes <I>listener</I> as a listener to changes in the model. 75 * @param listener the ChangeListener to remove 76 */ 77 void removeChangeListener(ChangeListener listener); 78} 79