Transparent Window In Java Back With A BANG

Here is another version of code for Transparent Window in Java seems to be better than any of the previous version and has a blur effect to emulate the Vista look.Here is the code:

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

import java.awt.image.*;



public class TransparentBackground extends JComponent

implements ComponentListener, WindowFocusListener, Runnable {

private JFrame _frame;

private BufferedImage _background;

private long _lastUpdate = 0;

private boolean _refreshRequested = true;



private Robot _robot;

private Rectangle _screenRect;



private ConvolveOp _blurOp;

public TransparentBackground(JFrame frame) {

_frame = frame;



try {

_robot = new Robot();

} catch (AWTException e) {

e.printStackTrace();

return;

}



Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();

_screenRect = new Rectangle(dim.width, dim.height);



float[] my_kernel = {

0.10f, 0.10f, 0.10f,

0.10f, 0.20f, 0.10f,

0.10f, 0.10f, 0.10f};

_blurOp = new ConvolveOp(new Kernel(3, 3, my_kernel));



updateBackground();

_frame.addComponentListener(this);

_frame.addWindowFocusListener(this);

new Thread(this).start();

}


protected void updateBackground() {

_background = _robot.createScreenCapture(_screenRect);

}



protected void refresh() {

if (_frame.isVisible() && this.isVisible()) {

repaint();

_refreshRequested = true;

_lastUpdate = System.currentTimeMillis();

}

}


protected void paintComponent(Graphics g) {

Graphics2D g2 = (Graphics2D) g;



Point pos = this.getLocationOnScreen();



BufferedImage buf = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_RGB);

buf.getGraphics().drawImage(_background, -pos.x, -pos.y, null);



Image img = _blurOp.filter(buf, null);

g2.drawImage(img, 0, 0, null);



g2.setColor(new Color(255, 255, 255, 192));

g2.fillRect(0, 0, getWidth(), getHeight());

}

public void componentHidden(ComponentEvent e) {
refresh();
}



public void componentMoved(ComponentEvent e) {

repaint();

}



public void componentResized(ComponentEvent e) {

repaint();

}



public void componentShown(ComponentEvent e) {

repaint();

}

public void windowGainedFocus(WindowEvent e) {

refresh();

}



public void windowLostFocus(WindowEvent e) {

refresh();

}

public void run() {

try {

while (true) {

Thread.sleep(100);

long now = System.currentTimeMillis();

if (_refreshRequested && ((now - _lastUpdate) > 1000)) {

if (_frame.isVisible()) {

Point location = _frame.getLocation();

_frame.setLocation(-_frame.getWidth(), -_frame.getHeight());

updateBackground();

_frame.setLocation(location);

refresh();

}

_lastUpdate = now;

_refreshRequested = false;

}

}

} catch (InterruptedException e) {

e.printStackTrace();

}

}



public static void main(String[] args) {

JFrame frame = new JFrame("Transparent Window");

TransparentBackground bg = new TransparentBackground(frame);



frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);



frame.getContentPane().add(bg);

frame.pack();

frame.setSize(200, 200);

frame.setLocation(500, 500);

frame.setVisible(true);

}

}


For Mac Users you need to simply write the following

import java.swing.*;
.......
public class TransparentBackground{

.......//code here
.......//code here
.......//code here
.......//code here

 frame.setBackground(new Color(0, 0, 0, 0));
}