| /* |
| * Copyright (c) 2016, 2017, 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.Image; |
| import java.awt.Robot; |
| import java.awt.Rectangle; |
| import java.awt.Color; |
| import java.awt.Point; |
| import java.awt.Dimension; |
| import java.awt.GradientPaint; |
| import java.awt.Graphics2D; |
| import java.awt.BorderLayout; |
| import java.awt.image.BufferedImage; |
| import java.awt.image.MultiResolutionImage; |
| import java.util.List; |
| import javax.swing.JButton; |
| import javax.swing.JFrame; |
| import javax.swing.JPanel; |
| import javax.swing.SwingUtilities; |
| import javax.swing.UIManager; |
| import javax.swing.plaf.metal.MetalLookAndFeel; |
| |
| /* |
| * @test |
| * @bug 8163193 8165213 |
| * @key headful |
| * @summary Metal L&F gradient is lighter on HiDPI display |
| * @run main/othervm -Dsun.java2d.uiScale=2 ButtonGradientTest |
| */ |
| public class ButtonGradientTest { |
| private static JFrame frame; |
| private static JButton button; |
| private static List<Image> images; |
| private static Robot robot; |
| |
| public static void main(String[] args) throws Exception { |
| try { |
| robot = new Robot(); |
| testGradient(); |
| } finally { |
| SwingUtilities.invokeAndWait(() -> { |
| if (frame != null) { |
| frame.dispose(); |
| } |
| }); |
| } |
| } |
| |
| private static void testGradient() throws Exception { |
| // Create and show the GUI |
| SwingUtilities.invokeAndWait(ButtonGradientTest::createAndShowGUI); |
| robot.waitForIdle(); |
| robot.delay(500); |
| |
| Rectangle rect = getButtonBounds(); |
| List<?> gradient = (List) UIManager.get("Button.gradient"); |
| float ratio = ((Number) gradient.get(0)).floatValue(); |
| Color c1 = (Color) gradient.get(2); |
| Color c2 = (Color) gradient.get(3); |
| int mid = (int) (ratio * rect.height); |
| // Get the expected gradient color |
| Color gradientColor = getGradientColor(rect.width, mid, c1, c2); |
| |
| // Get color from robot captured hidpi image of the button |
| getImageFromRobot(); |
| int x = rect.x + rect.width / 2; |
| int y = rect.y + mid / 2; |
| Color buttonColor = new Color(((BufferedImage)(images.get(1))).getRGB( |
| (int)(x), (int)(y))); |
| |
| if (!similarColors(buttonColor, gradientColor)) { |
| throw new RuntimeException("Button gradient is changed!"); |
| } |
| } |
| |
| private static void createAndShowGUI() { |
| |
| try { |
| UIManager.setLookAndFeel(new MetalLookAndFeel()); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| |
| frame = new JFrame(); |
| frame.setSize(300, 300); |
| frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); |
| |
| JPanel panel = new JPanel(new BorderLayout()); |
| button = new JButton(""); |
| panel.add(button); |
| frame.getContentPane().add(panel); |
| frame.setVisible(true); |
| } |
| |
| private static void getImageFromRobot() { |
| try { |
| Point butLoc = button.getLocationOnScreen(); |
| Dimension butSize = button.getSize(); |
| MultiResolutionImage multiResolutionImage = |
| robot.createMultiResolutionScreenCapture( |
| new Rectangle((int)butLoc.getX(), |
| (int)butLoc.getY(), (int)butSize.getWidth(), |
| (int)butSize.getHeight())); |
| images = multiResolutionImage.getResolutionVariants(); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| |
| if(images.size() < 2) { |
| throw new RuntimeException("HiDpi Image not captured - " + |
| "Check is this HiDpi display system?"); |
| } |
| } |
| |
| private static Rectangle getButtonBounds() throws Exception { |
| Rectangle[] rectangles = new Rectangle[1]; |
| SwingUtilities.invokeAndWait(() -> { |
| rectangles[0] = button.getBounds(); |
| rectangles[0].setLocation(button.getLocationOnScreen()); |
| }); |
| return rectangles[0]; |
| } |
| |
| private static Color getGradientColor(int w, int h, Color c1, Color c2) { |
| GradientPaint gradient = new GradientPaint(0, 0, c1, 0, h, c2, |
| true); |
| BufferedImage img = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB); |
| Graphics2D g = img.createGraphics(); |
| g.setPaint(gradient); |
| g.fillRect(0, 0, w, h); |
| g.dispose(); |
| return new Color(img.getRGB(w / 2, h / 2)); |
| } |
| |
| private static boolean similarColors(Color c1, Color c2) { |
| return similar(c1.getRed(), c2.getRed()) |
| && similar(c1.getGreen(), c2.getGreen()) |
| && similar(c1.getBlue(), c2.getBlue()); |
| } |
| |
| private static boolean similar(int i1, int i2) { |
| return Math.abs(i2 - i1) < 6; |
| } |
| } |