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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2000, 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 | package javax.swing; | ||
| 26 | |||
| 27 | /** | ||
| 28 | * A data model for a combo box. This interface extends <code>ListDataModel</code> | ||
| 29 | * and adds the concept of a <i>selected item</i>. The selected item is generally | ||
| 30 | * the item which is visible in the combo box display area. | ||
| 31 | * <p> | ||
| 32 | * The selected item may not necessarily be managed by the underlying | ||
| 33 | * <code>ListModel</code>. This disjoint behavior allows for the temporary | ||
| 34 | * storage and retrieval of a selected item in the model. | ||
| 35 | * | ||
| 36 | * @param <E> the type of the elements of this model | ||
| 37 | * | ||
| 38 | * @author Arnaud Weber | ||
| 39 | */ | ||
| 40 | public interface ComboBoxModel<E> extends ListModel<E> { | ||
| 41 | |||
| 42 | /** | ||
| 43 | * Set the selected item. The implementation of this method should notify | ||
| 44 | * all registered <code>ListDataListener</code>s that the contents | ||
| 45 | * have changed. | ||
| 46 | * | ||
| 47 | * @param anItem the list object to select or <code>null</code> | ||
| 48 | * to clear the selection | ||
| 49 | */ | ||
| 50 | void setSelectedItem(Object anItem); | ||
| 51 | |||
| 52 | /** | ||
| 53 | * Returns the selected item | ||
| 54 | * @return The selected item or <code>null</code> if there is no selection | ||
| 55 | */ | ||
| 56 | Object getSelectedItem(); | ||
| 57 | } | ||