/*

 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/* @test

 * @bug 4743225

 * @summary Size of JComboBox list is wrong when list is populated via PopupMenuListener

 * @author Alexander Potochkin

 */

import sun.awt.SunToolkit;

import javax.accessibility.AccessibleContext;

import javax.swing.JComboBox;

import javax.swing.JFrame;

import javax.swing.SwingUtilities;

import javax.swing.event.PopupMenuEvent;

import javax.swing.event.PopupMenuListener;

import javax.swing.plaf.basic.BasicComboPopup;

import java.awt.FlowLayout;

import java.awt.Point;

import java.awt.Robot;

import java.awt.Toolkit;

import java.awt.event.InputEvent;

public class bug4743225 extends JFrame {

    private static JComboBox cb;

    private static volatile boolean flag;

    public bug4743225() {

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        setLayout(new FlowLayout());

        cb = new JComboBox(new Object[] {"one", "two", "three"});

        cb.addPopupMenuListener(new PopupMenuListener() {

            public void popupMenuWillBecomeVisible(PopupMenuEvent e) {

                cb.addItem("Test");

            }

            public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {

            }

            public void popupMenuCanceled(PopupMenuEvent e) {

            }

        });

        add(cb);

        pack();

    }

    public static BasicComboPopup getPopup() {

        AccessibleContext c = cb.getAccessibleContext();

        for(int i = 0; i < c.getAccessibleChildrenCount(); i ++) {

            if (c.getAccessibleChild(i) instanceof BasicComboPopup) {

                return (BasicComboPopup) c.getAccessibleChild(i);

            }

        }

        throw new AssertionError("No BasicComboPopup found");

    }

    public static void main(String... args) throws Exception {

        Robot robot = new Robot();

        robot.setAutoDelay(20);

        SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();

        SwingUtilities.invokeAndWait(new Runnable() {

            public void run() {

                new bug4743225().setVisible(true);

            }

        });

        toolkit.realSync();

        // calling this method from main thread is ok

        Point point = cb.getLocationOnScreen();

        robot.mouseMove(point.x + 10, point.y + 10);

        robot.mousePress(InputEvent.BUTTON1_MASK);

        robot.mouseRelease(InputEvent.BUTTON1_MASK);

        toolkit.realSync();

        SwingUtilities.invokeAndWait(new Runnable() {

            public void run() {

                if(getPopup().getList().getLastVisibleIndex() == 3) {

                    flag = true;

                }

            }

        });

        if (!flag) {

            throw new RuntimeException("The ComboBox popup wasn't correctly updated");

        }

    }

}