/*

 * Copyright (c) 2018, 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.

 */

/*

 * @test

 * @key headful

 * @bug 8195738

 * @summary scroll position in ScrollPane is reset after calling validate()

 * @run main ScrollPaneValidateTest

 */

import java.awt.ScrollPane;

import java.awt.BorderLayout;

import java.awt.GridLayout;

import java.awt.Button;

import java.awt.Dimension;

import java.awt.Frame;

import java.awt.Panel;

import java.awt.Point;

import java.awt.Robot;

import java.awt.AWTException;

public class ScrollPaneValidateTest extends Frame {

  ScrollPane pane;

  public ScrollPaneValidateTest() {

    setBounds(300, 300, 300, 300);

    pane = new ScrollPane(ScrollPane.SCROLLBARS_NEVER);

    add(pane, BorderLayout.NORTH);

    pane.add(new InnerPanel());

  }

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

    Robot robot = new Robot();

    final ScrollPaneValidateTest obj = new ScrollPaneValidateTest();

    obj.setVisible(true);

    // set to some scroll position

    obj.pane.setScrollPosition(600, 200);

    // get the newly set position

    Point scrollPosition = obj.pane.getScrollPosition();

    // call validate multiple times

    obj.pane.validate();

    robot.delay(1000);

    obj.pane.validate();

    robot.delay(1000);

    // compare position after calling the validate function

    if(!scrollPosition.equals(obj.pane.getScrollPosition())) {

      obj.dispose();

      throw new RuntimeException("Scrolling position is changed in ScrollPane");

    }

    obj.dispose();

    return;

  }

  class InnerPanel extends Panel {

    public InnerPanel() {

      this.setLayout(new GridLayout(2, 4));

      for (int i = 1; i <= 8; i++) {

        this.add(new Button("Button" + i));

      }

    }

    public Dimension getPreferredSize() {

      return new Dimension(980, 200);

    }

  }

}