hi !

I repost my question cause my last post doesn't appear anymore on the group.
Last time, I put two images for example. Maybe it is why my message does
not appear. So this time, take two images with transparent background or
let me your email adress so I can send you the right images I use.

My problem :

I still have a little problem with my transparent window. I put a piece of
code to understand :
- I put a JLabel in a "transparent" window (don't look at the transparency,
it's not perfect but it's enought to understand the mechanism)
- I put a MouseListener on the JLabel : when mouse enters, the image
changes.

My problem is that the image changes but it is painted with a grey opaque
background (default window background). BUT, but, if you exist and
re-enter, the image is painted correctly, with the "ransparent" background.

I can't manage to solve this little problem.

Here is my code :

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class TransparentWindow extends JWindow implements
MouseMotionListener, FocusListener {

JPanel contentPane;
ImageIcon img1 = new ImageIcon("package.png");  // put the right path
ImageIcon img2 = new ImageIcon("email.png");
JLabel label1 = new JLabel(img1);
 
Image     img,tim;
Graphics  tig;
Point     mp;
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();

public TransparentWindow() {

// window (475x100), centered and top screen
setBounds((int)(d.getWidth()-475)/2,0,475,100);

// captures the screen to make the "transparent" background
capture();

// add label
contentPane = (JPanel) getContentPane();
contentPane.setLayout(new FlowLayout(FlowLayout.CENTER,15,15));
contentPane.add(label1);

// add the MouseListener that changes the image
label1.addMouseListener(new MouseAdapter() {
 public void mouseEntered(MouseEvent e){
 label1.setIcon(img2);
 paint(getGraphics());
 }
});

// add listeners for transparency    
addMouseMotionListener(this);
addFocusListener(this);

setVisible(true);

}

// Listeners for transparency

     public void focusGained(FocusEvent fe)
     {
     Point p = getLocation();
     setLocation(11111,0);
     capture();
     setLocation(p);
     }      
           
     public void focusLost(FocusEvent fe)
     {
     }
     
     public void capture()
     {
        try {
        Robot r    = new Robot();
        Rectangle rect = new Rectangle(0,0,d.width,d.height);
        img = r.createScreenCapture(rect);
        } catch(AWTException awe) {
          System.out.println("robot excepton occurred");
          }
      }
       
      public void mouseDragged(MouseEvent m)
      {
      Point p = m.getPoint();
      int x = getX()+p.x-mp.x;
      int y = getY()+p.y-mp.y;
      setLocation(x,y);
      Graphics g = getGraphics();
      paint(g);
      }
       
      public void mouseMoved(MouseEvent m)
      {
      mp = m.getPoint();
      }

// paint        
  public void paint(Graphics g)
  {
     // Creates an off-screen image (double-buffering)
     if (tim == null)
     {
     tim = createImage(getWidth(),getHeight());
     tig = tim.getGraphics();
     }
     
     // paints the screen capture then the grey semi transparent rectangle  
     tig.drawImage(img,0,0,getWidth(),getHeight(),
          getX(),getY(),getX()+getWidth(),getY()+getHeight(),null);
     tig.setColor(new Color(0,0,0,128));
     tig.fillRoundRect(0,0,getWidth(),getHeight(),100,120);
     
     g.drawImage(tim,0,0,null);
     
     // paints the label with the "transparent" background
     Rectangle rect2 = label1.getBounds();
     Graphics lg = g.create(rect2.x, rect2.y, rect2.width, rect2.height);
     label1.paint(lg);
  }
       
  public void update(Graphics g)
  {
     this.paint(g);
  }
       

// Main
 public static void main (String[] args)  
 {
   new TransparentWindow();
 }

}

Thanks for your help

--
Arnaud