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8187759: Background not refreshed when painting over a transparent JF…
…rame Reviewed-by: azvegint, abhiscxk, serb
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Tejesh R
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Feb 21, 2024
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test/jdk/javax/swing/JFrame/JFrameBackgroundRefreshTest.java
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/* | ||
* Copyright (c) 2023, 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. | ||
*/ | ||
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import java.awt.Color; | ||
import java.awt.Component; | ||
import java.awt.Font; | ||
import java.awt.Graphics; | ||
import java.awt.Graphics2D; | ||
import java.awt.MouseInfo; | ||
import java.awt.Point; | ||
import java.awt.Rectangle; | ||
import java.awt.Robot; | ||
import java.awt.event.MouseAdapter; | ||
import java.awt.event.MouseEvent; | ||
import java.awt.image.BufferedImage; | ||
import java.io.File; | ||
import java.io.IOException; | ||
import javax.imageio.ImageIO; | ||
import javax.swing.JFrame; | ||
import javax.swing.JLabel; | ||
import javax.swing.JPanel; | ||
import javax.swing.SwingUtilities; | ||
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/* | ||
* @test | ||
* @key headful | ||
* @bug 8187759 | ||
* @summary Test to check if JFrame background is refreshed in Linux. | ||
* @requires (os.family == "linux") | ||
* @run main JFrameBackgroundRefreshTest | ||
*/ | ||
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public class JFrameBackgroundRefreshTest { | ||
public static JFrame frame; | ||
private static final BufferedImage test = generateImage(); | ||
private static Point p = new Point(); | ||
private static Robot robot; | ||
private static JFrame whiteFrame; | ||
private static Point frameLocation; | ||
private static int frameCenterX, frameCenterY, awayX, awayY; | ||
private static int imageCenterX, imageCenterY; | ||
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public static void main(String[] args) throws Exception { | ||
try { | ||
SwingUtilities.invokeAndWait(() -> { | ||
try { | ||
JFrameBackgroundRefreshTest.initialize(); | ||
} catch (Exception e) { | ||
throw new RuntimeException(e); | ||
} | ||
}); | ||
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SwingUtilities.invokeAndWait(() -> { | ||
frameLocation = whiteFrame.getLocationOnScreen(); | ||
frameCenterX = frameLocation.x + whiteFrame.getWidth() / 2; | ||
frameCenterY = frameLocation.y + whiteFrame.getHeight() / 2; | ||
awayX = frameLocation.x + whiteFrame.getWidth() + 100; | ||
awayY = frameLocation.y + whiteFrame.getHeight() / 2; | ||
imageCenterX = p.x + test.getWidth() / 2; | ||
imageCenterY = p.y + test.getHeight() / 2; | ||
}); | ||
robot.delay(100); | ||
robot.waitForIdle(); | ||
robot.mouseMove(imageCenterX, imageCenterY); | ||
robot.delay(100); | ||
robot.waitForIdle(); | ||
moveMouseSlowly(frameCenterX, frameCenterY); | ||
robot.delay(1000); | ||
robot.waitForIdle(); | ||
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moveMouseSlowly(awayX, awayY); | ||
robot.delay(100); | ||
robot.waitForIdle(); | ||
Rectangle screenCaptureRect = new Rectangle(frameCenterX - 50, | ||
frameCenterY - 50, 100, 100); | ||
BufferedImage bufferedImage = robot.createScreenCapture(screenCaptureRect); | ||
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if (!compareImages(bufferedImage)) { | ||
try { | ||
ImageIO.write(bufferedImage, "png", | ||
new File("FailureImage.png")); | ||
} catch (IOException e) { | ||
e.printStackTrace(); | ||
} | ||
throw new RuntimeException("Test Failed!"); | ||
} | ||
System.out.println("Test Passed!"); | ||
} finally { | ||
SwingUtilities.invokeAndWait(() -> { | ||
if (frame != null) { | ||
frame.dispose(); | ||
} | ||
if (whiteFrame != null) { | ||
whiteFrame.dispose(); | ||
} | ||
}); | ||
} | ||
} | ||
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private static void moveMouseSlowly( int targetX, int targetY) { | ||
Point currentMousePos = MouseInfo.getPointerInfo().getLocation(); | ||
int currentX = currentMousePos.x; | ||
int currentY = currentMousePos.y; | ||
int deltaX = targetX - currentX; | ||
int deltaY = targetY - currentY; | ||
int steps = 50; | ||
double stepX = (double) deltaX / steps; | ||
double stepY = (double) deltaY / steps; | ||
for (int i = 1; i <= steps; i++) { | ||
int nextX = currentX + (int) Math.round(i * stepX); | ||
int nextY = currentY + (int) Math.round(i * stepY); | ||
robot.mouseMove(nextX, nextY); | ||
robot.delay(10); | ||
} | ||
robot.mouseMove(targetX, targetY); | ||
} | ||
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private static boolean compareImages(BufferedImage bufferedImage) { | ||
int sampleRGB = bufferedImage.getRGB(0,0); | ||
for (int x = 0; x < bufferedImage.getWidth(); x++) { | ||
for (int y = 0; y < bufferedImage.getHeight(); y++) { | ||
if (bufferedImage.getRGB(x, y) != sampleRGB) { | ||
return false; | ||
} | ||
} | ||
} | ||
return true; | ||
} | ||
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public static void initialize() throws Exception { | ||
frame = new JFrame("JFrame Background refresh test"); | ||
whiteFrame = new JFrame("White Frame"); | ||
robot = new Robot(); | ||
whiteFrame.setSize(200, 200); | ||
whiteFrame.setBackground(Color.WHITE); | ||
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); | ||
frame.setUndecorated(true); | ||
frame.setExtendedState(JFrame.MAXIMIZED_BOTH); | ||
frame.setBackground(new Color(0, 0, 0, 0)); | ||
frame.setContentPane(new TranslucentPane()); | ||
frame.addMouseMotionListener(new MouseDragListener()); | ||
whiteFrame.setLocationRelativeTo(null); | ||
whiteFrame.setVisible(true); | ||
frame.setVisible(true); | ||
frame.setAlwaysOnTop(true); | ||
} | ||
private static class MouseDragListener extends MouseAdapter { | ||
@Override | ||
public void mouseMoved(MouseEvent e) { | ||
p = e.getPoint(); | ||
frame.repaint(); | ||
} | ||
} | ||
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/** Capture an image of any component **/ | ||
private static BufferedImage getImage(Component c) { | ||
if (c == null) { | ||
return null; | ||
} | ||
BufferedImage image = new BufferedImage(c.getWidth(), | ||
c.getHeight(), BufferedImage.TYPE_INT_ARGB); | ||
Graphics2D g = image.createGraphics(); | ||
c.printAll(g); | ||
g.dispose(); | ||
return image; | ||
} | ||
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/** Generates a dummy image to be painted on the frame **/ | ||
private static BufferedImage generateImage() { | ||
JLabel label = new JLabel("test"); | ||
label.setFont(new Font("Arial", Font.BOLD, 24)); | ||
label.setSize(label.getPreferredSize()); | ||
return getImage(label); | ||
} | ||
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public static class TranslucentPane extends JPanel { | ||
public TranslucentPane() { | ||
setOpaque(false); | ||
} | ||
@Override | ||
protected void paintComponent(Graphics g) { | ||
super.paintComponent(g); | ||
Graphics2D g2d = (Graphics2D) g.create(); | ||
g2d.setColor(new Color(0,0,0,0)); | ||
g2d.fillRect(0, 0, getWidth(), getHeight()); | ||
g2d.drawImage(test, p.x, p.y, this); | ||
g2d.dispose(); | ||
} | ||
} | ||
} |