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/*
 * @test
 * @bug 4196987
 * @summary Test Metal L&F JTree expander icons transparency.
 * @library /java/awt/regtesthelpers
 * @build PassFailJFrame
 * @run main/manual bug4196987
 */

import java.awt.Color;
import java.awt.GridLayout;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTree;
import javax.swing.UIManager;

public class bug4196987 {
    static final String INSTRUCTIONS = """
        If the background of tree icons are red, the test PASSES.
        Otherwise the test FAILS.
    """;

    public static void main(String[] args) throws Exception {
        UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
        PassFailJFrame.builder()
                .title("bug4196987 Test Instructions")
                .instructions(INSTRUCTIONS)
                .columns(40)
                .testUI(bug4196987::createUI)
                .build()
                .awaitAndCheck();
    }

    static JFrame createUI() {
        JFrame f = new JFrame("JTree Icon Transparency Test");
        JPanel p = new JPanel();
        p.setBackground(Color.red);
        p.setLayout(new GridLayout(1, 1));
        JTree t = new JTree();
        t.setOpaque(false);
        p.add(t);
        f.add(p);
        f.setSize(200, 200);
        return f;
    }
}