/*

 * Copyright (c) 2014, 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 8032872

 * @summary Tests JComboBox selection via the mouse

 * @author Dmitry Markov

 */

import javax.swing.*;

import javax.swing.plaf.basic.BasicComboPopup;

import javax.swing.plaf.basic.ComboPopup;

import javax.swing.plaf.metal.MetalComboBoxUI;

import javax.swing.plaf.metal.MetalLookAndFeel;

import java.awt.*;

import java.awt.event.InputEvent;

import java.awt.event.KeyEvent;

public class MouseComboBoxTest {

    private static final String[] items = {"One", "Two", "Three", "Four", "Five"};

    private static Robot robot = null;

    private static JFrame frame = null;

    private static JComboBox comboBox = null;

    private static MyComboBoxUI comboBoxUI = null;

    public static void main(String[] args) throws Exception {

        robot = new Robot();

        robot.setAutoDelay(50);

        UIManager.setLookAndFeel(new MetalLookAndFeel());

        SwingUtilities.invokeAndWait(new Runnable() {

            @Override

            public void run() {

                createAndShowGUI();

            }

        });

        for (int i = 0; i < items.length; i++) {

            // Open popup

            robot.keyPress(KeyEvent.VK_DOWN);

            robot.keyRelease(KeyEvent.VK_DOWN);

            Point point = getItemPointToClick(i);

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

            robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);

            robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);

            if (i != getSelectedIndex()) {

                throw new RuntimeException("Test Failed! Incorrect value of selected index = " + getSelectedIndex() +

                        ", expected value = " + i);

            }

        }

    }

    private static Point getItemPointToClick(final int item) throws Exception {

        final Point[] result = new Point[1];

        SwingUtilities.invokeAndWait(new Runnable() {

            @Override

            public void run() {

                BasicComboPopup popup = (BasicComboPopup)comboBoxUI.getComboPopup();

                Point point = popup.getLocationOnScreen();

                Dimension size = popup.getSize();

                int step = size.height / items.length;

                point.x += size.width / 2;

                point.y += step / 2 + step * item;

                result[0] = point;

            }

        });

        return result[0];

    }

    private static int getSelectedIndex() throws Exception {

        final int[] result = new int[1];

        SwingUtilities.invokeAndWait(new Runnable() {

            @Override

            public void run() {

                result[0] = comboBox.getSelectedIndex();

            }

        });

        return result[0];

    }

    private static void createAndShowGUI() {

        frame = new JFrame("MouseComboBoxTest");

        comboBox = new JComboBox(items);

        comboBox.setEditable(true);

        comboBoxUI = new MyComboBoxUI();

        comboBox.setUI(comboBoxUI);

        frame.pack();

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setVisible(true);

        JWindow window = new JWindow(frame);

        window.add(comboBox);

        window.pack();

        window.setVisible(true);

    }

    private static class MyComboBoxUI extends MetalComboBoxUI {

        public ComboPopup getComboPopup() {

            return popup;

        }

    }

}