58 lines
2.2 KiB
Java
58 lines
2.2 KiB
Java
/*
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* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package javax.swing;
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/**
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* A data model for a combo box. This interface extends <code>ListDataModel</code>
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* and adds the concept of a <i>selected item</i>. The selected item is generally
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* the item which is visible in the combo box display area.
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* <p>
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* The selected item may not necessarily be managed by the underlying
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* <code>ListModel</code>. This disjoint behavior allows for the temporary
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* storage and retrieval of a selected item in the model.
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*
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* @param <E> the type of the elements of this model
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*
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* @author Arnaud Weber
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*/
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public interface ComboBoxModel<E> extends ListModel<E> {
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/**
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* Set the selected item. The implementation of this method should notify
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* all registered <code>ListDataListener</code>s that the contents
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* have changed.
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*
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* @param anItem the list object to select or <code>null</code>
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* to clear the selection
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*/
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void setSelectedItem(Object anItem);
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/**
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* Returns the selected item
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* @return The selected item or <code>null</code> if there is no selection
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*/
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Object getSelectedItem();
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}
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