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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * 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.

 *

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 */

/*

 * @test

 * @key headful

 * @bug 8077409

 * @summary Drawing deviates when validate() is invoked on java.awt.ScrollPane

 * @author mikhail.cherkasov@oracle.com

 * @run main bug8077409Test

 */

import java.awt.*;

import java.awt.event.*;

public class bug8077409Test extends Frame {

  ScrollPane pane;

  MyCanvas myCanvas;

  class MyCanvas extends Canvas {

    public Dimension getPreferredSize() {

      return new Dimension(400, 800);

    }

    public void paint(Graphics g) {

      g.setColor(Color.BLACK);

      g.drawLine(0, 0, 399, 0);

      g.setColor(Color.RED);

      g.drawLine(0, 1, 399, 1);

      g.setColor(Color.BLUE);

      g.drawLine(0, 2, 399, 2);

      g.setColor(Color.GREEN);

      g.drawLine(0, 3, 399, 3);

    }

  }

  public bug8077409Test() {

    super();

    setLayout(new BorderLayout());

    pane = new ScrollPane();

    myCanvas = new MyCanvas();

    pane.add(myCanvas);

    add(pane, BorderLayout.CENTER);

    setSize(320, 480);

  }

  @Override

  protected void processKeyEvent(KeyEvent e) {

    super.processKeyEvent(e);

  }

  public static void main(String[] args) throws AWTException, InterruptedException {

    final bug8077409Test obj = new bug8077409Test();

    obj.setVisible(true);

    Toolkit.getDefaultToolkit().addAWTEventListener(new AWTEventListener() {

      @Override

      public void eventDispatched(AWTEvent e) {

        KeyEvent keyEvent = (KeyEvent) e;

        if(keyEvent.getID() == KeyEvent.KEY_RELEASED) {

            if (keyEvent.getKeyCode() == KeyEvent.VK_1) {

              System.out.println(obj.pane.toString());

              System.out.println("obj.myCanvas.pos: " + obj.myCanvas.getBounds());

              System.out.println(obj.myCanvas.toString());

            }  else if (keyEvent.getKeyCode() == KeyEvent.VK_2) {

              obj.repaint();

           } else if (keyEvent.getKeyCode() == KeyEvent.VK_DOWN) {

              Point scrollPosition = obj.pane.getScrollPosition();

              scrollPosition.translate(0, 1);

              obj.pane.setScrollPosition(scrollPosition);

            } else if (keyEvent.getKeyCode() == KeyEvent.VK_UP) {

              Point scrollPosition = obj.pane.getScrollPosition();

              scrollPosition.translate(0, -1);

              obj.pane.setScrollPosition(scrollPosition);

            } else if (keyEvent.getKeyCode() == KeyEvent.VK_SPACE) {

              obj.pane.validate();

            }

          }

        }

    }, AWTEvent.KEY_EVENT_MASK);

      Point scrollPosition = obj.pane.getScrollPosition();

      scrollPosition.translate(0, 1);

      obj.pane.setScrollPosition(scrollPosition);

      int y = obj.pane.getComponent(0).getLocation().y;

      obj.pane.validate();

      if(y != obj.pane.getComponent(0).getLocation().y){

          throw new RuntimeException("Wrong position of component in ScrollPane");

      }

  }

}