void tableMouseDown(Event event) {
   if (isDisposed() || !isVisible()) return;
   Point pt = new Point(event.x, event.y);
   int lineWidth = table.getLinesVisible() ? table.getGridLineWidth() : 0;
   TableItem item = table.getItem(pt);
   if ((table.getStyle() & SWT.FULL_SELECTION) != 0) {
     if (item == null) return;
   } else {
     int start = item != null ? table.indexOf(item) : table.getTopIndex();
     int end = table.getItemCount();
     Rectangle clientRect = table.getClientArea();
     for (int i = start; i < end; i++) {
       TableItem nextItem = table.getItem(i);
       Rectangle rect = nextItem.getBounds(0);
       if (pt.y >= rect.y && pt.y < rect.y + rect.height + lineWidth) {
         item = nextItem;
         break;
       }
       if (rect.y > clientRect.y + clientRect.height) return;
     }
     if (item == null) return;
   }
   TableColumn newColumn = null;
   int columnCount = table.getColumnCount();
   if (columnCount == 0) {
     if ((table.getStyle() & SWT.FULL_SELECTION) == 0) {
       Rectangle rect = item.getBounds(0);
       rect.width += lineWidth;
       rect.height += lineWidth;
       if (!rect.contains(pt)) return;
     }
   } else {
     for (int i = 0; i < columnCount; i++) {
       Rectangle rect = item.getBounds(i);
       rect.width += lineWidth;
       rect.height += lineWidth;
       if (rect.contains(pt)) {
         newColumn = table.getColumn(i);
         break;
       }
     }
     if (newColumn == null) {
       if ((table.getStyle() & SWT.FULL_SELECTION) == 0) return;
       newColumn = table.getColumn(0);
     }
   }
   setRowColumn(item, newColumn, true);
   setFocus();
   return;
 }
 void keyDown(Event event) {
   if (row == null) return;
   switch (event.character) {
     case SWT.CR:
       notifyListeners(SWT.DefaultSelection, new Event());
       return;
   }
   int rowIndex = table.indexOf(row);
   int columnIndex = column == null ? 0 : table.indexOf(column);
   switch (event.keyCode) {
     case SWT.ARROW_UP:
       setRowColumn(Math.max(0, rowIndex - 1), columnIndex, true);
       break;
     case SWT.ARROW_DOWN:
       setRowColumn(Math.min(rowIndex + 1, table.getItemCount() - 1), columnIndex, true);
       break;
     case SWT.ARROW_LEFT:
     case SWT.ARROW_RIGHT:
       {
         int columnCount = table.getColumnCount();
         if (columnCount == 0) break;
         int[] order = table.getColumnOrder();
         int index = 0;
         while (index < order.length) {
           if (order[index] == columnIndex) break;
           index++;
         }
         if (index == order.length) index = 0;
         int leadKey = (getStyle() & SWT.RIGHT_TO_LEFT) != 0 ? SWT.ARROW_RIGHT : SWT.ARROW_LEFT;
         if (event.keyCode == leadKey) {
           setRowColumn(rowIndex, order[Math.max(0, index - 1)], true);
         } else {
           setRowColumn(rowIndex, order[Math.min(columnCount - 1, index + 1)], true);
         }
         break;
       }
     case SWT.HOME:
       setRowColumn(0, columnIndex, true);
       break;
     case SWT.END:
       {
         int i = table.getItemCount() - 1;
         setRowColumn(i, columnIndex, true);
         break;
       }
     case SWT.PAGE_UP:
       {
         int index = table.getTopIndex();
         if (index == rowIndex) {
           Rectangle rect = table.getClientArea();
           TableItem item = table.getItem(index);
           Rectangle itemRect = item.getBounds(0);
           rect.height -= itemRect.y;
           int height = table.getItemHeight();
           int page = Math.max(1, rect.height / height);
           index = Math.max(0, index - page + 1);
         }
         setRowColumn(index, columnIndex, true);
         break;
       }
     case SWT.PAGE_DOWN:
       {
         int index = table.getTopIndex();
         Rectangle rect = table.getClientArea();
         TableItem item = table.getItem(index);
         Rectangle itemRect = item.getBounds(0);
         rect.height -= itemRect.y;
         int height = table.getItemHeight();
         int page = Math.max(1, rect.height / height);
         int end = table.getItemCount() - 1;
         index = Math.min(end, index + page - 1);
         if (index == rowIndex) {
           index = Math.min(end, index + page - 1);
         }
         setRowColumn(index, columnIndex, true);
         break;
       }
   }
 }