private TableColumn createColumn(
     final Table table, String text, int alignment, SelectionListener listener) {
   final TableColumn column = new TableColumn(table, SWT.NONE);
   column.setWidth(70);
   column.setText(text);
   column.setMoveable(true);
   column.setAlignment(alignment);
   column.addSelectionListener(listener);
   return column;
 }
  @Override
  public void createPartControl(Composite parent) {
    final IActionBars actionBars = getViewSite().getActionBars();
    IToolBarManager toolbar = actionBars.getToolBarManager();
    mSymbolEntryText = new TextContributionItem(""); // $NON-NLS-1$
    toolbar.add(mSymbolEntryText);
    toolbar.add(new AddSymbolAction(mSymbolEntryText, this));

    final Table table =
        new Table(parent, SWT.MULTI | SWT.FULL_SELECTION | SWT.V_SCROLL | SWT.BORDER);
    table.setHeaderVisible(true);
    mViewer = new TableViewer(table);
    GridDataFactory.defaultsFor(table).applyTo(table);

    final MarketDataItemComparator comparator = new MarketDataItemComparator();
    mViewer.setComparator(comparator);

    SelectionListener listener =
        new SelectionAdapter() {
          @Override
          public void widgetSelected(SelectionEvent e) {
            // determine new sort column and direction
            TableColumn sortColumn = table.getSortColumn();
            TableColumn currentColumn = (TableColumn) e.widget;
            final int index = table.indexOf(currentColumn);
            int dir = table.getSortDirection();
            if (sortColumn == currentColumn) {
              dir = dir == SWT.UP ? SWT.DOWN : SWT.UP;
            } else {
              table.setSortColumn(currentColumn);
              dir = SWT.UP;
            }
            table.setSortDirection(dir);
            comparator.setSort(dir == SWT.UP ? 1 : -1);
            comparator.setIndex(index);
            mViewer.refresh();
          }
        };

    // create columns, using FIXFieldLocalizer to preserve backwards
    // compatibility
    TableViewerColumn symbolColumn =
        new TableViewerColumn(
            mViewer,
            createColumn(
                table,
                FIXFieldLocalizer.getLocalizedFIXFieldName(Symbol.class.getSimpleName()),
                SWT.LEFT,
                listener));
    symbolColumn.setEditingSupport(new SymbolEditingSupport());
    createColumn(
        table,
        FIXFieldLocalizer.getLocalizedFIXFieldName(LastPx.class.getSimpleName()),
        SWT.RIGHT,
        listener);
    createColumn(
        table,
        FIXFieldLocalizer.getLocalizedFIXFieldName(LastQty.class.getSimpleName()),
        SWT.RIGHT,
        listener);
    createColumn(
        table,
        FIXFieldLocalizer.getLocalizedFIXFieldName(BidSize.class.getSimpleName()),
        SWT.RIGHT,
        listener);
    createColumn(
        table,
        FIXFieldLocalizer.getLocalizedFIXFieldName(BidPx.class.getSimpleName()),
        SWT.RIGHT,
        listener);
    createColumn(
        table,
        FIXFieldLocalizer.getLocalizedFIXFieldName(OfferPx.class.getSimpleName()),
        SWT.RIGHT,
        listener);
    createColumn(
        table,
        FIXFieldLocalizer.getLocalizedFIXFieldName(OfferSize.class.getSimpleName()),
        SWT.RIGHT,
        listener);

    // restore table state if it exists
    if (mViewState != null) {
      ColumnState.restore(table, mViewState);
      for (TableColumn column : table.getColumns()) {
        if (column.getWidth() == 0) {
          column.setResizable(false);
        }
      }
    }

    registerContextMenu();
    getSite().setSelectionProvider(mViewer);

    ObservableListContentProvider content = new ObservableListContentProvider();
    mViewer.setContentProvider(content);
    IObservableSet domain = content.getKnownElements();
    IObservableMap[] maps =
        new IObservableMap[] {
          BeansObservables.observeMap(domain, MarketDataViewItem.class, "symbol"), // $NON-NLS-1$
          createCompositeMap(
              domain, "latestTick", MDPackage.Literals.MD_LATEST_TICK__PRICE), // $NON-NLS-1$
          createCompositeMap(
              domain, "latestTick", MDPackage.Literals.MD_LATEST_TICK__SIZE), // $NON-NLS-1$
          createCompositeMap(
              domain, "topOfBook", MDPackage.Literals.MD_TOP_OF_BOOK__BID_SIZE), // $NON-NLS-1$
          createCompositeMap(
              domain, "topOfBook", MDPackage.Literals.MD_TOP_OF_BOOK__BID_PRICE), // $NON-NLS-1$
          createCompositeMap(
              domain, "topOfBook", MDPackage.Literals.MD_TOP_OF_BOOK__ASK_PRICE), // $NON-NLS-1$
          createCompositeMap(
              domain, "topOfBook", MDPackage.Literals.MD_TOP_OF_BOOK__ASK_SIZE) // $NON-NLS-1$
        };
    mViewer.setLabelProvider(new ObservableMapLabelProvider(maps));
    mViewer.setUseHashlookup(true);
    mItems = WritableList.withElementType(MarketDataViewItem.class);
    mViewer.setInput(mItems);
  }