/**
  * Returns a rectangle describing the receiver's size and location relative to its parent.
  *
  * @return the receiver's bounding rectangle
  * @exception SWTException
  *     <ul>
  *       <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  *       <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
  *     </ul>
  *
  * @since 1.3
  */
 public Rectangle getBounds() {
   checkWidget();
   Rectangle result = new Rectangle(0, 0, 0, 0);
   int index = parent.indexOf(this);
   if (index != -1) {
     int selectionIndex = parent.getSelectionIndex();
     boolean selected = index == selectionIndex;
     Rectangle padding = parent.getItemPadding(selected);
     String text = getText();
     if (text != null) {
       Point extent = Graphics.stringExtent(parent.getFont(), text);
       result.width = extent.x;
       result.height = extent.y;
     }
     Image image = getImage();
     if (image != null) {
       Rectangle imageSize = image.getBounds();
       result.width += imageSize.width + IMAGE_TEXT_SPACING;
       result.height = Math.max(result.height, imageSize.height);
     }
     result.width += 2 * ITEM_BORDER + padding.width;
     result.height += ITEM_BORDER + padding.height;
     if (selected) {
       result.height += SELECTED_ITEM_BORDER;
     }
     if (selectionIndex != -1) {
       if (index + 1 == selectionIndex || index - 1 == selectionIndex) {
         result.width -= ITEM_BORDER;
       }
     }
     if (isBarTop()) {
       if (index != selectionIndex) {
         result.y += SELECTED_ITEM_BORDER;
       }
     } else {
       result.y = parent.getBounds().height - 2 * parent.getBorderWidth() - result.height;
       if (index != selectionIndex) {
         result.y -= SELECTED_ITEM_BORDER;
       }
     }
     if (index > 0) {
       TabItem leftItem = parent.getItem(index - 1);
       Rectangle leftItemBounds = leftItem.getBounds();
       result.x = leftItemBounds.x + leftItemBounds.width + TABS_SPACING;
       if (index == selectionIndex || index - 1 == selectionIndex) {
         result.x -= TABS_SPACING;
       }
     }
   }
   return result;
 }
 /**
  * Returns the tab item at the given point in the receiver or null if no such item exists. The
  * point is in the coordinate system of the receiver.
  *
  * @param point the point used to locate the item
  * @return the tab item at the given point, or null if the point is not in a tab item
  * @exception IllegalArgumentException
  *     <ul>
  *       <li>ERROR_NULL_ARGUMENT - if the point is null
  *     </ul>
  *
  * @exception SWTException
  *     <ul>
  *       <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  *       <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
  *     </ul>
  *
  * @since 3.4
  */
 public TabItem getItem(Point point) {
   checkWidget();
   if (point == null) error(SWT.ERROR_NULL_ARGUMENT);
   long /*int*/ list = OS.gtk_container_get_children(handle);
   if (list == 0) return null;
   int itemCount = OS.g_list_length(list);
   OS.g_list_free(list);
   for (int i = 0; i < itemCount; i++) {
     TabItem item = items[i];
     Rectangle rect = item.getBounds();
     if (rect.contains(point)) return item;
   }
   return null;
 }