/*
 * Copyright (c) 2016, 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.
 */

import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.image.BaseMultiResolutionImage;
import java.awt.image.BufferedImage;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.SwingUtilities;

/* @test
 * @bug 8147440 8147016
 * @summary HiDPI (Windows): Swing components have incorrect sizes after
 *          changing display resolution
 * @author Alexander Scherbatiy
 * @run applet/manual=yesno WindowResizingOnDPIChangingTest.html
 */
public class WindowResizingOnDPIChangingTest extends JApplet {

    @Override
    public void init() {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                JButton button = new JButton("Show Window");
                button.addActionListener((e) -> {

                    int x = 100;
                    int y = 200;
                    int w = 300;
                    int h = 400;

                    final BaseMultiResolutionImage mriImage
                            = new BaseMultiResolutionImage(
                                    new BufferedImage[]{
                                        getImage(1, Color.GREEN, w, h),
                                        getImage(2, Color.BLUE, w, h)});

                    final Frame frame = new Frame("Display DPI changing test") {

                        @Override
                        public void paint(Graphics g) {
                            super.paint(g);
                            g.drawImage(mriImage, 0, 0, null);
                        }
                    };
                    frame.setBounds(x, y, w, h);
                    frame.addWindowListener(new WindowAdapter() {

                        @Override
                        public void windowClosing(WindowEvent e) {
                            frame.dispose();
                        }
                    });
                    frame.setVisible(true);
                });
                getContentPane().setLayout(new FlowLayout());
                getContentPane().add(button);
            }
        });
    }

    private static BufferedImage getImage(int scale, Color c, int w, int h) {

        int sw = scale * w;
        int sh = scale * h;

        BufferedImage image = new BufferedImage(
                sw, sh, BufferedImage.TYPE_INT_RGB);
        Graphics g = image.getGraphics();
        g.setColor(c);
        g.fillRect(0, 0, sw, sh);

        g.setColor(Color.WHITE);
        Font f = g.getFont();
        g.setFont(new Font(f.getName(), Font.BOLD, scale * 48));
        g.drawString(String.format("scale: %dx", scale), sw / 6, sh / 2);
        return image;
    }
}