/*

 * 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

 * @key headful

 * @bug 8004298

 * @summary NPE in WindowsTreeUI.ensureRowsAreVisible

 * @author Alexander Scherbatiy

 * @library ../../regtesthelpers

 * @modules java.desktop/com.sun.java.swing.plaf.windows

 * @build Util

 * @run main bug8004298

 */

import java.awt.*;

import java.awt.event.InputEvent;

import javax.swing.*;

import javax.swing.tree.*;

import java.util.concurrent.Callable;

import com.sun.java.swing.plaf.windows.WindowsLookAndFeel;

import com.sun.java.swing.plaf.windows.WindowsTreeUI;

public class bug8004298 {

    private static JTree tree;

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

        Robot robot = new Robot();

        robot.setAutoDelay(50);

        try {

            UIManager.setLookAndFeel(new WindowsLookAndFeel());

        } catch (javax.swing.UnsupportedLookAndFeelException ulafe) {

            System.out.println(ulafe.getMessage());

            System.out.println("The test is considered PASSED");

            return;

        }

        SwingUtilities.invokeAndWait(new Runnable() {

            @Override

            public void run() {

                createAndShowGUI();

            }

        });

        robot.waitForIdle();

        Point point = Util.invokeOnEDT(new Callable<Point>() {

            @Override

            public Point call() throws Exception {

                Rectangle rect = tree.getRowBounds(2);

                Point p = new Point(rect.x + rect.width / 2, rect.y + rect.height / 2);

                SwingUtilities.convertPointToScreen(p, tree);

                return p;

            }

        });

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

        robot.mousePress(InputEvent.BUTTON1_MASK);

        robot.mouseRelease(InputEvent.BUTTON1_MASK);

        robot.mousePress(InputEvent.BUTTON1_MASK);

        robot.mouseRelease(InputEvent.BUTTON1_MASK);

        robot.waitForIdle();

    }

    private static void createAndShowGUI() {

        JFrame frame = new JFrame();

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");

        root.add(new DefaultMutableTreeNode("colors"));

        DefaultMutableTreeNode sports = new DefaultMutableTreeNode("sports");

        sports.add(new DefaultMutableTreeNode("basketball"));

        sports.add(new DefaultMutableTreeNode("football"));

        root.add(sports);

        tree = new JTree(root);

        tree.setUI(new NullReturningTreeUI());

        frame.getContentPane().add(tree);

        frame.pack();

        frame.setVisible(true);

    }

    private static final class NullReturningTreeUI extends WindowsTreeUI {

        @Override

        public Rectangle getPathBounds(JTree tree, TreePath path) {

            // the method can return null and callers have to be ready for

            // that. Simulate the case by returning null for unknown reason.

            if (path != null && path.toString().contains("football")) {

                return null;

            }

            return super.getPathBounds(tree, path);

        }

    }

}