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 26 package javax.swing; 27 28 import javax.swing.event.*; 29 30 /** 31 * A model that supports at most one indexed selection. 32 * 33 * @author Dave Moore 34 */ 35 public interface SingleSelectionModel { 36 /** 37 * Returns the model's selection. 38 * 39 * @return the model's selection, or -1 if there is no selection 40 * @see #setSelectedIndex 41 */ 42 public int getSelectedIndex(); 43 44 /** 45 * Sets the model's selected index to <I>index</I>. 46 * 47 * Notifies any listeners if the model changes 48 * 49 * @param index an int specifying the model selection 50 * @see #getSelectedIndex 51 * @see #addChangeListener 52 */ 53 public void setSelectedIndex(int index); 54 55 /** 56 * Clears the selection (to -1). 57 */ 58 public void clearSelection(); 59 60 /** 61 * Returns true if the selection model currently has a selected value. 62 * @return true if a value is currently selected 63 */ 64 public boolean isSelected(); 65 66 /** 67 * Adds <I>listener</I> as a listener to changes in the model. 68 * @param listener the ChangeListener to add 69 */ 70 void addChangeListener(ChangeListener listener); 71 72 /** 73 * Removes <I>listener</I> as a listener to changes in the model. 74 * @param listener the ChangeListener to remove 75 */ 76 void removeChangeListener(ChangeListener listener); 77 }