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* 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).
*
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* 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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*/
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.font.TextLayout;
import java.awt.image.BufferedImage;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.stream.IntStream;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextPane;
import javax.swing.SwingUtilities;
import javax.swing.WindowConstants;
import javax.swing.border.EmptyBorder;
/* @test
* @bug 8276849
* @summary Update the window icon on DPI scale factor changes
* @requires os.family == "windows"
* @run main/manual WindowIconUpdateOnDPIChangingTest
*/
public class WindowIconUpdateOnDPIChangingTest {
private static volatile boolean testResult = false;
private static final CountDownLatch countDownLatch = new CountDownLatch(1);
private static JFrame frame;
private static final String INSTRUCTIONS = "\n"
+ "INSTRUCTIONS:\n"
+ "Verify that the window icon is properly updated after changing the display DPI.
\n"
+ "\n"
+ "The test is applicable for OSes that allows to change the display DPI\n"
+ "without rebooting the system. Press PASS for other systems.
\n"
+ "\n"
+ ""
+ " - Set the display DPI scale factor to 100%
"
+ " - Check that the string \"16\" is painted in the window icon.
"
+ " - Set the display DPI scale factor to a different value,"
+ " or move the frame to another screen with a different DPI scale factor.
"
+ " - Check that the window icon is updated, it should display \"24\" on a screen"
+ " with a 150% DPI scaling, or \"32\" on a screen with a 200% DPI scaling."
+ "
If so, press PASS, otherwise press FAIL. "
+ "\n"
+ "\n"
+ "\n";
public static void main(String[] args) throws Exception {
SwingUtilities.invokeLater(WindowIconUpdateOnDPIChangingTest::createUI);
if (!countDownLatch.await(15, TimeUnit.MINUTES)) {
SwingUtilities.invokeAndWait(() -> frame.dispose());
throw new RuntimeException("Timed out!");
} else if (!testResult) {
throw new RuntimeException("Test fails!");
}
}
private static void createUI() {
frame = new JFrame("Window Icon Update Test");
frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
frame.setSize(640, 480);
frame.addWindowListener(new WindowAdapter() {
public void windowClosed(WindowEvent e) {
countDownLatch.countDown();
}
});
frame.getContentPane().setLayout(new BorderLayout());
frame.getContentPane().add(createInstrumentsPane(), BorderLayout.CENTER);
frame.getContentPane().add(createControlPanel(), BorderLayout.SOUTH);
frame.setIconImages(IntStream.rangeClosed(16, 32).mapToObj(size -> createIcon(size)).toList());
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private static JTextPane createInstrumentsPane() {
JTextPane instructionsPane = new JTextPane();
instructionsPane.setContentType("text/html");
instructionsPane.setText(INSTRUCTIONS);
instructionsPane.setEditable(false);
instructionsPane.setBorder(new EmptyBorder(10, 10, 10, 10));
return instructionsPane;
}
private static JPanel createControlPanel() {
JButton passButton = new JButton("Pass");
passButton.addActionListener(e -> testResult = true);
passButton.addActionListener(e -> frame.dispose());
JButton failButton = new JButton("Fail");
failButton.addActionListener(e -> frame.dispose());
JPanel controlPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
controlPanel.add(passButton);
controlPanel.add(failButton);
return controlPanel;
}
/**
* Creates an icon of the size specified. The size is drawn at the center of the icon.
*
* @param size the size of the icon
*/
private static Image createIcon(int size) {
BufferedImage image = new BufferedImage(size, size, BufferedImage.TYPE_INT_ARGB);
Graphics2D g = image.createGraphics();
g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
g.setColor(Color.WHITE);
g.fillRect(0, 0, size, size);
g.setFont(new Font("Dialog", Font.BOLD, 12));
g.setColor(Color.BLACK);
TextLayout layout = new TextLayout(String.valueOf(size), g.getFont(), g.getFontRenderContext());
int height = (int) layout.getBounds().getHeight();
int width = (int) layout.getBounds().getWidth();
layout.draw(g, (size - width) / 2f - 1, (size + height) / 2f);
return image;
}
}