Nimbus - override color for TableHeader

Question

I would like to redefine the background color of the headers in JTableusing Nimbus L & F. I am effectively “doing” Nimbus L & F, i.e. I make small adjustments.

Everything I try to do seems to have no effect.

Here's the SSCCS :

public class MyTest {

    public static void main(String[] args) {
        new MyTest();
    }

    public MyTest() {
        try {
            UIManager.setLookAndFeel("javax.swing.plaf.nimbus.NimbusLookAndFeel");
        } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
            Logger.getLogger(MyTest.class.getName()).log(Level.SEVERE, null, ex);
        }

        UIManager.put("TableHeader.background", Color.RED);

        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                JFrame frame = new JFrame("Test");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setLayout(new BorderLayout());
                frame.add(new TestPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class TestPane extends JPanel {

        public TestPane() {
            DefaultTableModel model = new DefaultTableModel(
                    new Object[][]{
                        {"hhvt ", "er sdf", "sfdg"},
                        {"hyshg ", "dh sdf", "jer"}
                    },
                    new Object[]{"Col A", "Col B", "Col C"}
            );
            JTable table = new JTable(model);

            setLayout(new BorderLayout());
            add(new JScrollPane(table));
        }

    }

}

Here is the result:

I am well aware that Nimbus is Synth L & F, so it uses Painter for anything. I bet I could override some Painterin UIManager, but I don't want to repeat Painter from scratch. The artists in Nimbus are pretty advanced, they use gradients and what you have. I would like to take advantage of this. This is just the color I would like to change.

Answer 1

, .

Painter s. , , , , , . Painter. , , . Nimbus Painters . . !

Nimbus . XML skin.laf ( JDK), XML . Painter s. , TableHeaderRendererPainter (, ) . , .

, NimbusLookAndFeel. .

skin.laf , . nimbusBlueGrey, . nimbusBlueGrey, Nimbus, . - . - , .

, (.. , , ..). . , - .

, NimbusLookAndFeel. , "" . , , Painter, NimbusLookAndFeel . Painter , , .

public class MyTest {

    public static void main(String[] args) throws UnsupportedLookAndFeelException {
        new MyTest();
    }

    public MyTest() throws UnsupportedLookAndFeelException {

        // Start dummy instance of L&F
        NimbusLookAndFeel nimbusTmp = new NimbusLookAndFeel();
        Object nimbusBlueGreyOrg = UIManager.get("nimbusBlueGrey");  // original value
        UIManager.put("nimbusBlueGrey", Color.RED);   // the color we want
        try {
            UIManager.setLookAndFeel(nimbusTmp);
        } catch (UnsupportedLookAndFeelException ex) {
            Logger.getLogger(MyTest.class.getName()).log(Level.SEVERE, null, ex);
        }
        Object painter = UIManager.get("TableHeader:\"TableHeader.renderer\"[Enabled].backgroundPainter");

        // We've got what we came for. Now unload the dummy.
        UIManager.getLookAndFeel().uninitialize(); // important to avoid UIDefaults change listeners firing
        UIManager.put("nimbusBlueGrey", nimbusBlueGreyOrg);  // revert

        // Load the L&F for real. 
        UIManager.setLookAndFeel(new NimbusLookAndFeel());

        // Swap in the value we saved previously
        UIManager.put("TableHeader:\"TableHeader.renderer\"[Enabled].backgroundPainter", painter);

        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                JFrame frame = new JFrame("Test");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setLayout(new BorderLayout());
                frame.add(new TestPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);

            }
        });
    }

    public class TestPane extends JPanel {

        public TestPane() {
            DefaultTableModel model = new DefaultTableModel(
                    new Object[][]{
                        {"hhvt ", "er sdf", "sfdg"},
                        {"hyshg ", "dh sdf", "jer"}},
                    new Object[]{"Col A", "Col B", "Col C"}
            );
            JTable table = new JTable(model);    
            setLayout(new BorderLayout());
            add(new JScrollPane(table));
        }

    }

}

, . - ?