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 * 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

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 */

import java.awt.Component;

import java.awt.Dimension;

import java.awt.Rectangle;

import java.awt.Toolkit;

import javax.swing.JComponent;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JTabbedPane;

import javax.swing.JViewport;

import javax.swing.SwingUtilities;

import javax.swing.UIManager;

import javax.swing.plaf.metal.MetalLookAndFeel;

import sun.awt.SunToolkit;

/**

 * @test

 * @bug 7170310

 * @author Alexey Ivanov

 * @summary Selected tab should be scrolled into view.

 * @run main bug7170310

 */

public class bug7170310 {

    private static final int TABS_NUMBER = 3;

    private static volatile JTabbedPane tabbedPane;

    private static volatile int count = 1;

    private static volatile JFrame frame;

    private static volatile Exception exception = null;

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

        try {

            UIManager.setLookAndFeel(new MetalLookAndFeel());

            SwingUtilities.invokeAndWait(bug7170310::createAndShowUI);

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

            toolkit.realSync();

            for (int i = 0; i < TABS_NUMBER; i++) {

                SwingUtilities.invokeAndWait(bug7170310::addTab);

                toolkit.realSync();

            }

            SwingUtilities.invokeAndWait(bug7170310::check);

            if (exception != null) {

                System.out.println("Test failed: " + exception.getMessage());

                throw exception;

            } else {

                System.out.printf("Test passed");

            }

        } finally {

            frame.dispose();

        }

    }

    private static void createAndShowUI() {

        frame = new JFrame("bug7170310");

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setSize(200, 100);

        tabbedPane = new JTabbedPane();

        tabbedPane.addTab("Main Tab", new JPanel());

        tabbedPane.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);

        frame.getContentPane().add(tabbedPane);

        frame.setVisible(true);

    }

    private static void addTab() {

        tabbedPane.addTab("Added Tab " + count++, new JPanel());

        tabbedPane.setSelectedIndex(tabbedPane.getTabCount() - 1);

    }

    private static void check() {

        try {

            JViewport vp = null;

            for (Component c : tabbedPane.getComponents()) {

                if (c instanceof JViewport) {

                    vp = (JViewport) c;

                    break;

                }

            }

            JComponent v = (JComponent) vp.getView();

            Rectangle vr = vp.getViewRect();

            Dimension vs = v.getSize();

            // The tab view must be scrolled to the end so that the last tab is visible

            if (vs.width != (vr.x + vr.width)) {

                throw new RuntimeException("tabScroller.tabPanel view is positioned incorrectly: "

                        + vs.width + " vs " + (vr.x + vr.width));

            }

        } catch (Exception e) {

            exception = e;

        }

    }

}