Hi,

I've developed an applet which enables multiple file uploads via http
using HttpClient 3.0. During the upload process, I would like to
display a non-modal dialog box with some text and an animation
(basically a message - "uploading" -  and an animated GIF). As soon as
upload is over, the dialog box should disappear.

To achieve this, I use a JDialog, and within it, a JPanel containing 2
JLabels: one for the text message and the other for the GIF image. My
problem is I get a grey area, the size of my dialog, with no controls
whatsoever inside, when I try to display the dialog!

I would be grateful if someone could help me resolve this issue. Please
see code below:

-------- my dialog class --------

public class TransferProgressDialog extends javax.swing.JDialog{

   private javax.swing.JLabel caption;
   private javax.swing.JLabel progressImg;
   private javax.swing.JPanel progressAnimJPanel;
   private java.awt.Component component;

   private int posX, posY;

   public TransferProgressDialog(java.awt.Component component, String
folderName){
       initComponents();
       this.component = component;
       this.setLocationRelativeTo(component);
       caption.setText("Uploading " + folderName);
   }

   public void showDialog(){
       this.setVisible(true);
       component.setEnabled(false);
   }

   public void hideDialog(){
       this.hide();
       component.setEnabled(true);
   }

   private void dialogMousePressed(java.awt.event.MouseEvent evt) {
       posX = evt.getX();
       posY = evt.getY();
   }

   private void dialogMouseDragged(java.awt.event.MouseEvent evt) {
       int deltaX = evt.getX() - posX;
       int deltaY = evt.getY() - posY;

       java.awt.Point pt = this.getLocation();
       this.setLocation(pt.x + deltaX, pt.y + deltaY);
   }

   private void initComponents(){
       java.awt.GridBagConstraints gridBagConstraints;

       progressAnimJPanel = new javax.swing.JPanel();
       caption = new javax.swing.JLabel();
       progressImg = new javax.swing.JLabel();

       progressAnimJPanel.setLayout(new java.awt.GridBagLayout());

       progressAnimJPanel.setBorder(new
javax.swing.border.BevelBorder(javax.swing.border.BevelBorder.RAISED));

       caption.setFont(new java.awt.Font("Tahoma", 1, 10));
       gridBagConstraints = new java.awt.GridBagConstraints();
       gridBagConstraints.ipady = 7;
       progressAnimJPanel.add(caption, gridBagConstraints);

       progressImg.setIcon(new
javax.swing.ImageIcon("./loading.gif"));
       gridBagConstraints = new java.awt.GridBagConstraints();
       gridBagConstraints.gridx = 0;
       gridBagConstraints.gridy = 1;
       gridBagConstraints.ipady = 7;
       progressAnimJPanel.add(progressImg, gridBagConstraints);

       this.addMouseListener(new java.awt.event.MouseAdapter() {
           public void mousePressed(java.awt.event.MouseEvent evt) {
               dialogMousePressed(evt);
           }
       });

       addMouseMotionListener(new java.awt.event.MouseMotionAdapter()
{
           public void mouseDragged(java.awt.event.MouseEvent evt) {
               dialogMouseDragged(evt);
           }
       });

       this.setContentPane(progressAnimJPanel);
       this.setSize(140, 80);
       this.setUndecorated(true);
       this.setAlwaysOnTop(true);
   }

}

-------- end dialog class --------

-------- sample code where I make use of the dialog --------

   public static boolean uploadFolder(File folder, String targetUrl,
java.awt.Component component){
       boolean success = true;

       PostMethod filePost = new PostMethod(targetUrl);

filePost.getParams().setBooleanParameter(HttpMethodParams.USE_EXPECT_CONTINUE,
false);

       TransferProgressDialog d = new
TransferProgressDialog(component, folder.getName());

       try{
           d.showDialog();

           File[] files = folder.listFiles();
           int numFiles = files.length;

           Part[] parts = new Part[numFiles + 1];
           parts[0] = new StringPart("folder_name", folder.getName());

           for(int i=0; i<numFiles; i++){
               parts[i+1] = new FilePart(files[i].getName(),
files[i]);
           }

           filePost.setRequestEntity(new MultipartRequestEntity(parts,
filePost.getParams()));

           HttpClient client = new HttpClient();

client.getHttpConnectionManager().getParams().setConnectionTimeout(5000);

           int status = client.executeMethod(filePost);
           if(status != HttpStatus.SC_OK){
               success = false;
           }
       }catch(Exception ex){
           success = false;
           ex.printStackTrace();
       }finally{
           filePost.releaseConnection();
           d.hideDialog();
           return success;
       }

   }

-------- end sample code --------