How to have a box layout on a JDialog, with an image set as background

Hi,
I need to have a JDialog in which there is a background image set (I already did this part, but only with the default layout). I further need to add text to the lower part of the JDialog. (For this, I guess I need to have a box layout.). I am not able to do so, because if I do so, I wont be able to set image background to the entire JDialog. Please help me out with how to solve this issue?
Thanks,
Joby

Hi jduprez,
Thanks for the reply. I checked Rob Camick's blog. It gives a nice way to add an image to a panel (*master panel*) and to use it.
I still have my problem open. The above solution gives panel that I can add to my JDialog. But on the bottom half of the image (as you said, BorderLayout.South), I need to add another structured set of components using a Border Layout again.!, ie, one more panel with a BorderLayout. So when I add
this panel, to the master panel containing the image, then the image gets cut off, at that point. I tried using component.setOpaque(false) on my sub-panel, still it does not work. Any idea, how to achieve this...?
Following is the code I have adapted.
public class BackgroundPanel extends JPanel
 public static final int SCALED = 0;
 public static final int TILED = 1;
 public static final int ACTUAL = 2;
 private Paint painter;
 private Image image;
 private int style = SCALED;
 private float alignmentX = 0.5f;
 private float alignmentY = 0.5f;
 private boolean isTransparentAdd = true;
 public static void main(String[] args) {
 Image img = getImage("D:/imgs/Snowdrop.jpg");
 BackgroundPanel panel = new BackgroundPanel(img);
 JDialog dlg = new JDialog();
 dlg.setLayout(new BorderLayout());
 dlg.add(panel);
 panel.setTransparentAdd(true);
 Panel nPanel = new Panel();
 nPanel.setLayout(new BorderLayout());
 JLabel label = new JLabel();
 //label.set
 label.setText("<html>HI This is another line </html>");
 nPanel.add(label, BorderLayout.NORTH);
 panel.add(nPanel/*label*/,BorderLayout.SOUTH);
 dlg.setSize(600, 500);
 dlg.setVisible(true);
 private static Image getImage(String fileName){
 File file = new File(fileName);
 Image image = null;
 try{
 image = ImageIO.read(file);
 catch(IOException ioe){
 /*JOptionPane.showMessageDialog(dlg, "Error in loading image file",
 "Error", JOptionPane.ERROR_MESSAGE, null);*/
 return image;
 * Set image as the background with the SCALED style
 public BackgroundPanel(Image image)
 this(image, SCALED);
 * Set image as the background with the specified style
 public BackgroundPanel(Image image, int style)
 this(image,style,-1,-1);
 * Set image as the backround with the specified style and alignment
 public BackgroundPanel(Image image, int style, float alignmentX, float alignmentY)
 setImage( image );
 setStyle( style );
 if (alignmentX > 0){
 setImageAlignmentX( alignmentX );
 if (alignmentY > 0){
 setImageAlignmentY( alignmentY );
 setLayout( new BorderLayout() );
 * Use the Paint interface to paint a background
 public BackgroundPanel(Paint painter)
 setPaint( painter );
 setLayout( new BorderLayout() );
 * Set the image used as the background
 public void setImage(Image image)
 this.image = image;
 repaint();
 * Set the style used to paint the background image
 public void setStyle(int style)
 this.style = style;
 repaint();
 * Set the Paint object used to paint the background
 public void setPaint(Paint painter)
 this.painter = painter;
 repaint();
 * Specify the horizontal alignment of the image when using ACTUAL style
 public void setImageAlignmentX(float alignmentX)
 this.alignmentX = alignmentX > 1.0f ? 1.0f : alignmentX < 0.0f ? 0.0f : alignmentX;
 repaint();
 * Specify the horizontal alignment of the image when using ACTUAL style
 public void setImageAlignmentY(float alignmentY)
 this.alignmentY = alignmentY > 1.0f ? 1.0f : alignmentY < 0.0f ? 0.0f : alignmentY;
 repaint();
 * Override method so we can make the component transparent
 public void add(JComponent component)
 add(component, null);
 * Override method so we can make the component transparent
 public void add(JComponent component, Object constraints)
 if (isTransparentAdd)
 makeComponentTransparent(component);
 super.add(component, constraints);
 * Controls whether components added to this panel should automatically
 * be made transparent. That is, setOpaque(false) will be invoked.
 * The default is set to true.
 public void setTransparentAdd(boolean isTransparentAdd)
 this.isTransparentAdd = isTransparentAdd;
 * Try to make the component transparent.
 * For components that use renderers, like JTable, you will also need to
 * change the renderer to be transparent. An easy way to do this it to
 * set the background of the table to a Color using an alpha value of 0.
 private void makeComponentTransparent(JComponent component)
 component.setOpaque( false );
 if (component instanceof JScrollPane)
 JScrollPane scrollPane = (JScrollPane)component;
 JViewport viewport = scrollPane.getViewport();
 viewport.setOpaque( false );
 Component c = viewport.getView();
 if (c instanceof JComponent)
 ((JComponent)c).setOpaque( false );
 * Add custom painting
 protected void paintComponent(Graphics g)
 super.paintComponent(g);
 // Invoke the painter for the background
 if (painter != null)
 Dimension d = getSize();
 Graphics2D g2 = (Graphics2D) g;
 g2.setPaint(painter);
 g2.fill( new Rectangle(0, 0, d.width, d.height) );
 // Draw the image
 if (image == null ) return;
 switch (style)
 case SCALED :
 drawScaled(g);
 break;
 case TILED :
 drawTiled(g);
 break;
 case ACTUAL :
 drawActual(g);
 break;
 default:
 drawScaled(g);
 * Custom painting code for drawing a SCALED image as the background
 private void drawScaled(Graphics g)
 Dimension d = getSize();
 g.drawImage(image, 0, 0, d.width, d.height, null);
 * Custom painting code for drawing TILED images as the background
 private void drawTiled(Graphics g)
 Dimension d = getSize();
 int width = image.getWidth( null );
 int height = image.getHeight( null );
 for (int x = 0; x < d.width; x += width)
 for (int y = 0; y < d.height; y += height)
 g.drawImage( image, x, y, null, null );
 * Custom painting code for drawing the ACTUAL image as the background.
 * The image is positioned in the panel based on the horizontal and
 * vertical alignments specified.
 private void drawActual(Graphics g)
 Dimension d = getSize();
 Insets insets = getInsets();
 int width = d.width - insets.left - insets.right;
 int height = d.height - insets.top - insets.left;
 float x = (width - image.getWidth(null)) * alignmentX;
 float y = (height - image.getHeight(null)) * alignmentY;
 g.drawImage(image, (int)x + insets.left, (int)y + insets.top, this);
}Thanks,
Joby

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