Thread: Gradient Translucent Window

hey there guys...
I've been working on this code for the past 2 days and just seems like i cant get it to work.

import java.awt.*;
import javax.swing.*;
 
public class test extends JFrame {
    public test() {
        super("GradientTranslucentWindow");
 
        setBackground(new Color(0,0,0,0));
        setSize(new Dimension(300,200));
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
        JPanel panel = new JPanel() {
            @Override
            protected void paintComponent(Graphics g) {
                if (g instanceof Graphics2D) {
                    final int R = 240;
                    final int G = 240;
                    final int B = 240;
 
                    Paint p = new GradientPaint(0.0f, 0.0f, new Color(R, G, B, 0),
                            					0.0f, getHeight(), new Color(R, G, B, 255), true);
                    Graphics2D g2d = (Graphics2D)g;
                    g2d.setPaint(p);
                    g2d.fillRect(0, 0, getWidth(), getHeight());
                }
            }
        };
        setContentPane(panel);
        setLayout(new GridBagLayout());
        add(new JButton("I am a Button"));
    }
 
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
            	test t = new test();
                t.setVisible(true);
            }
        });
    }
}

please can someone help... i need some sleep.

just seems like i cant get it to work.

What is not working about it? Does it compile? Are there exceptions? Does it misbehave?

Sorry, should have specify that. Think its the lack of sleep...
But pulling a third day without sleep i finally sort it out.

when compiled, one should see a gradient transparent effect from right to left on a JPanel placed on a JForm, without effecting other components and the JFrame as Undecorated.

 
import java.awt.*;
import javax.swing.*;
 
public class Test extends JFrame{
 
	private JPanel  Panel1;
	private JButton Button1;
 
	Test() {		
		Panel1 = new JPanel() { 
			public void paintComponent(Graphics grh) {
				int H = this.getHeight();
				int W = this.getWidth();
 
				Paint p = new GradientPaint(0.0f, 0.0f, new Color(240, 240, 240, 0),
											0, H, new Color(0, 0, 240, 255));
 
				Graphics2D g2d = (Graphics2D) grh;
		        g2d.setPaint(p);
		        g2d.fillRect(0, 0, W, H);
			}
		};
 
		Button1 = new JButton("Click me");
		Button1.setBounds(30, 30, 200, 200);
 
		Panel1.setOpaque(false);
		Panel1.setDoubleBuffered(false);
		Panel1.setBackground(new Color(240, 240, 240, 128));	
		Panel1.add(Button1);
		this.getContentPane().add(Panel1);
 
		this.setUndecorated(true);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setSize(400, 400);
		this.setLocationRelativeTo(null);
		this.setVisible(true);
	}
 
	public static void main(String[] args) {
		Test t = new Test();
		com.sun.awt.AWTUtilities.setWindowOpaque(t, false);
	}
 
}

Thanks for having a look and trying...
at least i can go sleep now...