/* * @(#)ComboPopup.java	1.15 03/12/19 * * Copyright 2004 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */package javax.swing.plaf.basic;import java.awt.event.MouseListener;import java.awt.event.MouseMotionListener;import java.awt.event.KeyListener;import javax.swing.JList;/** * The interface which defines the methods required for the implementation of the popup * portion of a combo box. * <p> * <strong>Warning:</strong> * Serialized objects of this class will not be compatible with * future Swing releases. The current serialization support is * appropriate for short term storage or RMI between applications running * the same version of Swing.  As of 1.4, support for long term storage * of all JavaBeans<sup><font size="-2">TM</font></sup> * has been added to the <code>java.beans</code> package. * Please see {@link java.beans.XMLEncoder}. * * @version 1.15 12/19/03 * @author Tom Santos */public interface ComboPopup {    /**     * Shows the popup     */    public void show();    /**     * Hides the popup     */    public void hide();    /**     * Returns true if the popup is visible (currently being displayed).     *      * @return <code>true<code> if the component is visible; <code>false</code> otherwise.     */    public boolean isVisible();    /**     * Returns the list that is being used to draw the items in the combo box.     * This method is highly implementation specific and should not be used     * for general list manipulation.     */    public JList getList();    /**     * Returns a mouse listener that will be added to the combo box or null.     * If this method returns null then it will not be added to the combo box.     *     * @return a <code>MouseListener</code> or null     */    public MouseListener getMouseListener();    /**     * Returns a mouse motion listener that will be added to the combo box or null.     * If this method returns null then it will not be added to the combo box.     *     * @return a <code>MouseMotionListener</code> or null     */    public MouseMotionListener getMouseMotionListener();    /**     * Returns a key listener that will be added to the combo box or null.     * If this method returns null then it will not be added to the combo box.     */    public KeyListener getKeyListener();    /**     * Called to inform the ComboPopup that the UI is uninstalling.     * If the ComboPopup added any listeners in the component, it should remove them here.     */    public void uninstallingUI();}