eclipse dialog area widget size

Question

I open a dialog via button click and want that the dialog is opened in the fully horizontal size as needed by the text without scrolling.

   protected Control createDialogArea(Composite parent) {
      Composite comp = (Composite) super.createDialogArea(parent);
      Font font = parent.getFont();
      Group group = new Group(comp, SWT.NONE);
      GridLayout topLayout = new GridLayout();
      group.setLayout(topLayout);
      GridData gd = new GridData(GridData.FILL, SWT.FILL, true, true);
      gd.heightHint = convertHeightInCharsToPixels(15);
      gd.widthHint = convertWidthInCharsToPixels(50);
      group.setLayoutData(gd);
      group.setFont(font);

      fText = new Text(group, SWT.MULTI | SWT.WRAP | SWT.BORDER | SWT.V_SCROLL);
      gd = new GridData(GridData.FILL_BOTH);
      gd.heightHint = convertHeightInCharsToPixels(10);
      gd.widthHint = convertWidthInCharsToPixels(60);
      fText .setLayoutData(gd);

      fText .setText(text);
      fText .setEditable(false);

      return comp;
   }