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 * Copyright (c) 2015, 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
  @bug 8142861
  @summary Check if multiresolution image behaves properly on HiDPI + non-HiDPI display pair.
  @author a.stepanov
  @run applet/manual=yesno MultiDisplayTest.html
*/


import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;


public class MultiDisplayTest extends Applet {

    private static final int W = 200;
    private static final int H = 200;



    public void init() { this.setLayout(new BorderLayout()); }

    public void start() {

        Button b = new Button("Start");

        b.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {

                ParentFrame p = new ParentFrame();
                new ChildDialog(p);
            }
        });

        add(b, BorderLayout.CENTER);

        validate();
        setVisible(true);
    }



    private static void generateImagePair(String name, Color c) {

        String name1x = name + ".png", name2x = name + "@2x.png";

        try {
            if (!new File(name1x).exists()) { generateImage(name1x, 1, c); }
            if (!new File(name2x).exists()) { generateImage(name2x, 2, c); }
        } catch (Exception dummy) {
            System.err.println("cannot create images for " + name);
            System.exit(1);
        }
    }

    private static void generateImage(String name, int scale, Color c) throws IOException {

        BufferedImage image = new BufferedImage(scale * W, scale * H, BufferedImage.TYPE_INT_RGB);
        Graphics g = image.getGraphics();
        g.setColor(c);
        g.fillRect(0, 0, scale * W, scale * H);

        g.setColor(Color.WHITE);
        Font f = g.getFont();
        g.setFont(new Font(f.getName(), Font.BOLD, scale * 48));
        g.drawChars((scale + "X").toCharArray(), 0, 2, scale * W / 2, scale * H / 2);

        ImageIO.write(image, "png", new File(name));
    }

    private static class ParentFrame extends Frame {

        private final String parentName = "parent";

        public ParentFrame() {
            EventQueue.invokeLater(this::CreateUI);
        }

        private void CreateUI() {

            generateImagePair(parentName, Color.BLACK);

            addWindowListener(new WindowAdapter() {
                @Override
                public void windowClosing(WindowEvent e) { dispose(); }
            });
            setSize(W, H);
            setLocation(50, 50);
            setTitle(parentName);
            setResizable(false);
            setVisible(true);
        }

        @Override
        public void paint(Graphics gr) {

            Graphics2D g = (Graphics2D) gr;
            if (g != null) {
                Image img = Toolkit.getDefaultToolkit().getImage(
                        new File(parentName + ".png").getAbsolutePath());
                g.drawImage(img, 0, 0, this);
            }
        }
    }

    private static class ChildDialog extends Dialog {

        private final String childName  = "child";

        public ChildDialog(Frame f) {
            super(f);
            EventQueue.invokeLater(this::CreateUI);
        }

        private void CreateUI() {

            generateImagePair(childName, Color.BLUE);

            addWindowListener(new WindowAdapter() {
                @Override
                public void windowClosing(WindowEvent e) { dispose(); }
            });
            setSize(W, H);
            setTitle(childName);
            setResizable(false);
            setModal(true);
            setVisible(true);
        }

        @Override
        public void paint(Graphics gr) {

            Graphics2D g = (Graphics2D) gr;
            if (g != null) {
                Image img = Toolkit.getDefaultToolkit().getImage(
                        new File(childName + ".png").getAbsolutePath());
                g.drawImage(img, 0, 0, this);
            }
        }
    }
}