ScrollOut.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
  @test
  @key headful
  @bug 7036733
  @summary Regression : NullPointerException when scrolling horizontally on AWT List
  @author Andrei Dmitriev area=awt-list
  @library ../../regtesthelpers
  @build Util
  @run main ScrollOut
*/

import java.awt.*;
import java.awt.event.*;
import test.java.awt.regtesthelpers.Util;

public class ScrollOut
{
    public static final void main(String args[])
    {
        final Frame frame = new Frame();
        final List list = new List();
        Robot robot = null;

        for (int i = 0; i < 5; i++){
            list.add("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
        }

        frame.add(list);

        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);


        try{
            robot = new Robot();
        }catch(AWTException e){
            throw new RuntimeException(e);
        }
        robot.waitForIdle();

        //Drag from center to the outside on left
        Point from = new Point(list.getLocationOnScreen().x + list.getWidth()/2,
                               list.getLocationOnScreen().y + list.getHeight()/2);
        Point to = new Point(list.getLocationOnScreen().x - 30,
                             from.y);

        robot.waitForIdle();
        Util.drag(robot, from, to, InputEvent.BUTTON1_MASK);

        robot.waitForIdle();

        //Drag from center to the outside on up
        to = new Point(from.x,
                       list.getLocationOnScreen().y - 50);

        robot.waitForIdle();
        Util.drag(robot, from, to, InputEvent.BUTTON1_MASK);

    }//End  init()
}