jdk-24/test/jdk/javax/swing/JComboBox/DisabledComboBoxFontTestAuto.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 * 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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/*
 * @test
 * @bug 7093691
 * @summary Tests if JComboBox has correct font color when disabled/enabled
 * @run main/othervm -Dsun.java2d.uiScale=1 DisabledComboBoxFontTestAuto
 */

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.nio.file.Path;

import javax.imageio.ImageIO;
import javax.swing.DefaultListCellRenderer;
import javax.swing.JComboBox;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

import static java.awt.image.BufferedImage.TYPE_INT_ARGB;

public class DisabledComboBoxFontTestAuto {
    private static JComboBox combo, combo2;
    private static BufferedImage enabledImage, disabledImage, enabledImage2, disabledImage2;
    private static Path testDir;
    private static String lafName;
    private static StringBuffer failingLafs;
    private static int COMBO_HEIGHT, COMBO_WIDTH, COMBO2_HEIGHT, COMBO2_WIDTH;

    private static void createCombo() {
        combo = new JComboBox();
        combo.addItem("Simple JComboBox");
        combo.setRenderer(new DefaultListCellRenderer());
        combo2 = new JComboBox();
        combo2.addItem("Simple JComboBox");
        COMBO_WIDTH = (int) combo.getPreferredSize().getWidth();
        COMBO_HEIGHT = (int) combo.getPreferredSize().getHeight();
        COMBO2_WIDTH = (int) combo2.getPreferredSize().getWidth();
        COMBO2_HEIGHT = (int) combo2.getPreferredSize().getHeight();
        combo.setSize(COMBO_WIDTH, COMBO_HEIGHT);
        combo2.setSize(COMBO2_WIDTH, COMBO2_HEIGHT);
    }

    private static void paintCombo() {
        combo.setEnabled(true);
        enabledImage = new BufferedImage(COMBO_WIDTH, COMBO_HEIGHT, TYPE_INT_ARGB);
        Graphics2D graphics2D = enabledImage.createGraphics();
        combo.paint(graphics2D);
        graphics2D.dispose();
        combo.setEnabled(false);
        disabledImage = new BufferedImage(COMBO_WIDTH, COMBO_HEIGHT, TYPE_INT_ARGB);
        graphics2D = disabledImage.createGraphics();
        combo.paint(graphics2D);
        graphics2D.dispose();
        combo2.setEnabled(true);
        enabledImage2 = new BufferedImage(COMBO2_WIDTH, COMBO2_HEIGHT, TYPE_INT_ARGB);
        graphics2D = enabledImage2.createGraphics();
        combo2.paint(graphics2D);
        graphics2D.dispose();
        combo2.setEnabled(false);
        disabledImage2 = new BufferedImage(COMBO2_WIDTH, COMBO2_HEIGHT, TYPE_INT_ARGB);
        graphics2D = disabledImage2.createGraphics();
        combo2.paint(graphics2D);
        graphics2D.dispose();
    }

    private static void testMethod() throws IOException {
        ImageIO.write(enabledImage, "png", new File(testDir
                + "/" + lafName + "Enabled.png"));
        ImageIO.write(disabledImage, "png", new File(testDir
                + "/" + lafName + "Disabled.png"));
        ImageIO.write(enabledImage2, "png", new File(testDir
                + "/" + lafName + "EnabledDLCR.png"));
        ImageIO.write(disabledImage2, "png", new File(testDir
                + "/" + lafName + "DisabledDLCR.png"));

        boolean isIdentical = true;
        Color eColor1, eColor2, dColor1, dColor2;

        // Use center line to compare RGB values
        int y = 10;
        for (int x = (enabledImage.getWidth() / 2) - 20;
             x < (enabledImage.getWidth() / 2) + 20; x++) {
            // Nimbus has a pixel offset in coordinates since Nimbus is 2px
            // smaller in width than other L&F's
            if (lafName.equals("Nimbus")) {
                eColor1 = new Color(enabledImage.getRGB(x + 1, y));
                eColor2 = new Color(enabledImage2.getRGB(x, y));
                dColor1 = new Color(disabledImage.getRGB(x + 1, y));
                dColor2 = new Color(disabledImage2.getRGB(x, y));
            } else {
                eColor1 = new Color(enabledImage.getRGB(x, y));
                eColor2 = new Color(enabledImage2.getRGB(x, y));
                dColor1 = new Color(disabledImage.getRGB(x, y));
                dColor2 = new Color(disabledImage2.getRGB(x, y));
            }
            if ((!isColorMatching(eColor1, eColor2)) || (!isColorMatching(dColor1, dColor2))) {
                isIdentical = false;
                break;
            }
        }

        if (isIdentical) {
            System.out.println("PASSED");
        } else {
            failingLafs.append(lafName + ", ");
        }
    }

    private static boolean isColorMatching(Color c1, Color c2) {
        if ((c1.getRed() != c2.getRed())
                || (c1.getBlue() != c2.getBlue())
                || (c1.getGreen() != c2.getGreen())) {

            System.out.println(lafName + " Enabled RGB failure: "
                    + c1.getRed() + ", "
                    + c1.getBlue() + ", "
                    + c1.getGreen() + " vs "
                    + c2.getRed() + ", "
                    + c2.getBlue() + ", "
                    + c2.getGreen());
            return false;
        }
        return true;
    }

    private static void setLookAndFeel(UIManager.LookAndFeelInfo laf) {
        try {
            UIManager.setLookAndFeel(laf.getClassName());
        } catch (UnsupportedLookAndFeelException ignored){
            System.out.println("Unsupported LookAndFeel: " + laf.getClassName());
        } catch (ClassNotFoundException | InstantiationException |
                IllegalAccessException e) {
            throw new RuntimeException(e);
        }
    }

    public static void main(String[] args) throws Exception {
        lafName = "null";
        failingLafs = new StringBuffer();
        testDir = Path.of(System.getProperty("test.classes", "."));
        for (UIManager.LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels()) {
            // Change Motif LAF name to avoid using slash in saved image file path
            lafName = laf.getName().equals("CDE/Motif") ? "Motif" : laf.getName();
            SwingUtilities.invokeAndWait(() -> setLookAndFeel(laf));
            SwingUtilities.invokeAndWait(DisabledComboBoxFontTestAuto::createCombo);
            SwingUtilities.invokeAndWait(DisabledComboBoxFontTestAuto::paintCombo);
            testMethod();
        }
        if (!failingLafs.isEmpty()) {
            // Remove trailing comma and whitespace
            failingLafs.setLength(failingLafs.length() - 2);
            throw new RuntimeException("FAIL - Enabled and disabled ComboBox " +
                    "does not match in these LAFs: " + failingLafs);
        }
    }
}