/*

 * Copyright (c) 2015, 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.

 */

import java.awt.BorderLayout;

import java.awt.Point;

import java.awt.Robot;

import java.awt.event.KeyEvent;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import javax.swing.SwingUtilities;

import javax.swing.UIManager;

import jdk.testlibrary.OSInfo;

/**

 * @test

 * @bug 8033000

 * @author Alexander Scherbatiy

 * @summary No Horizontal Mouse Wheel Support In BasicScrollPaneUI

 * @library ../../../../lib/testlibrary

 * @build jdk.testlibrary.OSInfo

 * @run main bug8033000

 */

public class bug8033000 {

    private static JScrollPane scrollPane;

    private static JTextArea textArea;

    private static Point point;

    private static final int delta;

    static {

        delta = OSInfo.getOSType().equals(OSInfo.OSType.MACOSX) ? -30 : 30;

    }

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

        Robot robot = new Robot();

        robot.setAutoDelay(50);

        SwingUtilities.invokeAndWait(bug8033000::createAndShowGUI);

        robot.waitForIdle();

        SwingUtilities.invokeAndWait(() -> {

            Point locationOnScreen = scrollPane.getLocationOnScreen();

            point = new Point(

                    locationOnScreen.x + scrollPane.getWidth() / 2,

                    locationOnScreen.y + scrollPane.getHeight() / 2);

        });

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

        robot.waitForIdle();

        // vertical scroll bar is enabled

        initScrollPane(true, false);

        robot.waitForIdle();

        robot.mouseWheel(delta);

        robot.waitForIdle();

        checkScrollPane(true);

        // vertical scroll bar is enabled + shift

        initScrollPane(true, false);

        robot.waitForIdle();

        robot.keyPress(KeyEvent.VK_SHIFT);

        robot.mouseWheel(delta);

        robot.keyRelease(KeyEvent.VK_SHIFT);

        robot.waitForIdle();

        checkScrollPane(true);

        // horizontal scroll bar is enabled

        initScrollPane(false, true);

        robot.waitForIdle();

        robot.mouseWheel(delta);

        robot.waitForIdle();

        checkScrollPane(false);

        // horizontal scroll bar is enabled + shift

        initScrollPane(false, true);

        robot.waitForIdle();

        robot.keyPress(KeyEvent.VK_SHIFT);

        robot.mouseWheel(delta);

        robot.keyRelease(KeyEvent.VK_SHIFT);

        robot.waitForIdle();

        checkScrollPane(false);

        // both scroll bars are enabled

        initScrollPane(true, true);

        robot.waitForIdle();

        robot.mouseWheel(delta);

        robot.waitForIdle();

        checkScrollPane(true);

        // both scroll bars are enabled + shift

        initScrollPane(true, true);

        robot.waitForIdle();

        robot.keyPress(KeyEvent.VK_SHIFT);

        robot.mouseWheel(delta);

        robot.keyRelease(KeyEvent.VK_SHIFT);

        robot.waitForIdle();

        checkScrollPane(false);

    }

    static void initScrollPane(boolean vVisible, boolean hVisible) throws Exception {

        SwingUtilities.invokeAndWait(() -> {

            scrollPane.getVerticalScrollBar().setValue(0);

            scrollPane.getHorizontalScrollBar().setValue(0);

            textArea.setRows(vVisible ? 100 : 1);

            textArea.setColumns(hVisible ? 100 : 1);

            scrollPane.getVerticalScrollBar().setVisible(vVisible);

            scrollPane.getHorizontalScrollBar().setVisible(hVisible);

        });

    }

    static void checkScrollPane(boolean verticalScrolled) throws Exception {

        SwingUtilities.invokeAndWait(() -> {

            if (verticalScrolled) {

                if (scrollPane.getVerticalScrollBar().getValue() == 0

                        || scrollPane.getHorizontalScrollBar().getValue() != 0) {

                    throw new RuntimeException("Wrong vertical scrolling!");

                }

            } else {

                if (scrollPane.getVerticalScrollBar().getValue() != 0

                        || scrollPane.getHorizontalScrollBar().getValue() == 0) {

                    throw new RuntimeException("Wrong horizontal scrolling!");

                }

            }

        });

    }

    static void createAndShowGUI() {

        JFrame frame = new JFrame();

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setSize(300, 300);

        textArea = new JTextArea("Hello World!");

        scrollPane = new JScrollPane(textArea);

        JPanel panel = new JPanel(new BorderLayout());

        panel.add(scrollPane, BorderLayout.CENTER);

        frame.getContentPane().add(panel);

        frame.setVisible(true);

    }

}