Jframe default look and feel

Hi,

I want to develop a transparent jframe. In that case I am using fallowing code example. But the problem is I want to remove the title bar of the jframe. To transparent the jframe, it needs default look and feel as true. So my question is, how can remove the title bar of jframe when it's with default look and feel mode?

import java.awt.*;
import javax.swing.*;
import static java.awt.GraphicsDevice.WindowTranslucency.*;

public class GradientTranslucentWindowDemo extends JFrame {
    public GradientTranslucentWindowDemo() {
        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) {
        // Determine what the GraphicsDevice can support.
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsDevice gd = ge.getDefaultScreenDevice();
        boolean isPerPixelTranslucencySupported = gd.isWindowTranslucencySupported(PERPIXEL_TRANSLUCENT);

//If translucent windows aren't supported, exit.
        if (!isPerPixelTranslucencySupported) {
            System.out.println("Per-pixel translucency is not supported");
            System.exit(0);
        }

JFrame.setDefaultLookAndFeelDecorated(true);

// Create the GUI on the event-dispatching thread
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                GradientTranslucentWindowDemo gtw = new GradientTranslucentWindowDemo();

// Display the window.
                gtw.setVisible(true);
            }
        });
    }
}

Thank you.

Check setUndecorated in the API:

Disables or enables decorations for
this frame. This method can only be
called while the frame is not
displayable.

setUndecorated()
use a JWindow()

Hi,

Thank you all for the reply's. I tried with the setUndecorated as true. But it's not working. K i will try with the JWindow. Any other solutions??

Thank you.

dushantha Rathnayake wrote:I tried with the setUndecorated as true. But it's not working.

SSCCE or it didn't happen. setUndecorated(true) always works as documented.

dushantha Rathnayake wrote:I tried with the setUndecorated as true. But it's not working.

I have used it couple of times, and it always worked. As the API says, make sure you invoke it before you actually display your frame. Can we see some of the code you are working with, please?

Hi,

I mean if I set setDefaultLookAndFeel as true and set setUndecoration as true but it's not working. Actually want to do transparent the background frame without its content. After transparent the frame I can put a JLabel and set image icon. so the UI will be the image. Please see the image fallowing.

Thank you.

another issue to remove empty space, use LayoutManagers and call pack() before JFrame#setVisible(true)

dushantha Rathnayake wrote:I mean if I set setDefaultLookAndFeel as true and set setUndecoration as true but it's not working.

Darryl Burke wrote:SSCCE or it didn't happen. setUndecorated(true) always works as documented.

I will ask the same question I asked a week ago - can we see the code you are now working with?

it seems the
JFrame.setDefaultLookAndFeelDecorated(true);
overrides
setUndecorated(true);

in place of setUndecorated(true);
add these lines

getLayeredPane().remove(getLayeredPane().getComponent(1));//removes titlebar
getRootPane().setBorder(null);//removes border

works OK in java 1.6, but future releases ??

Hi,

Ok guys. I'm going to post the real code.

import java.awt.Color;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.GridLayout;
import java.awt.Rectangle;
import java.awt.GraphicsDevice.WindowTranslucency;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class Terminal extends JFrame implements ButtonClickDitector{

private static final long serialVersionUID = 1L;
	private JPanel jContentPane = null;
	private JLabel jLabel = null;
	
	public Terminal() {
		super();
		setBackground(new Color(0,0,0,0));
		initialize();
	}

private void initialize() {
		this.setSize(434, 695);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setContentPane(getJContentPane());
		this.setTitle("JFrame");
		this.setUndecorated(true);
		this.getLayeredPane().remove(getLayeredPane().getComponent(1));//removes titlebar 
		this.getRootPane().setBorder(null);//removes border 
	}

private JPanel getJContentPane() {
		if (jContentPane == null) {
			jLabel = new JLabel();
			jLabel.setBounds(new Rectangle(0, -10, 434, 674));
			jLabel.setIcon(new ImageIcon(getClass().getResource("/com/afcs/orik/resource/background.png")));
			jLabel.setText("JLabel");
			jContentPane = new JPanel();
			jContentPane.setLayout(null);
			jContentPane.add(jLabel, null);
			jContentPane.setOpaque(false);
		}
		return jContentPane;
	}

public static void main(String args[]){
		GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
                GraphicsDevice gd = ge.getDefaultScreenDevice();
                boolean isPerPixelTranslucencySupported = gd.isWindowTranslucencySupported(WindowTranslucency.TRANSLUCENT);

if (!isPerPixelTranslucencySupported) {
                     System.out.println("Per-pixel translucency is not supported");
                     System.exit(0);
                }
        
		JFrame.setDefaultLookAndFeelDecorated(true);
		Terminal terminal=new Terminal();
		terminal.setVisible(true);
	}

}

Thank you.

Earlier you said, and I quote from that post:

dushantha Rathnayake wrote:if I set setDefaultLookAndFeel as true and set setUndecoration as true

Now it's

dushantha Rathnayake wrote: JFrame.setDefaultLookAndFeelDecorated(true);

Do you see what you didn't tell us?

Michael's advice notwithstanding, why on earth would you even want to setDefaultLookAndFeelDecorated(true) when you what you want is an undecorated JFrame?

Darryl Burke wrote for why on earth would you even want to setDefaultLookAndFeelDecorated(true) when you what you want is an undecorated JFrame?

right counterproductive, great minds thinks alike !!!

Hi,

Ok guys, If I done any wrong, Please sorry for that. Actually I want to get the fallowing UI. Please help me to develop it.

Thank you.