private Table table;

	/**
	 * @param parent
	 *            parent
	 * @param style
	 *            style
	 * @param workbenchPartSite
	 *            getSite(), if not null
	 */
	public NodeOverviewComposite(final Composite parent, final int style,
			final IWorkbenchSite workbenchPartSite) {
		super(parent, style);
		partSite = workbenchPartSite;

		GridLayout layout = new GridLayout();
		setLayout(layout);
		createViewer(this);

		if (partSite != null) {
			makeActions();
			// Used for popup menu when right click on table.
			// hookContextMenu();
			contributeToActionBars();
		}

	}

	/**
	 * @param parent
	 *            parent composite for viewer.
	 */
	private void createViewer(final Composite parent) {
		viewer = new XSBTableViewer(this.getClass(), "nodeListTableViewer",
				parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL
						| SWT.FULL_SELECTION | SWT.BORDER);

		createColumns(parent, viewer);

		table = viewer.getTable();
		table.setHeaderVisible(true);
		table.setLinesVisible(true);
		createColumnsWeigthData(table);

		viewer.setContentProvider(new ArrayContentProvider());
		if (nodeModelProvider.getNodes().size() != 0) {
			viewer.setInput(nodeModelProvider.getNodes());
		}

		viewer.addSelectionChangedListener(new ISelectionChangedListener() {
			@Override
			public void selectionChanged(final SelectionChangedEvent event) {
				Table table = ((TableViewer) event.getSource()).getTable();
				Point pt = table.toControl(Display.getCurrent()
						.getCursorLocation());

				TableItem item = table.getItem(pt);
				if (item != null) {
					if (item.getBounds(EDIT_COLUMN_INDEX).contains(pt)) {
						// Place holder until we have an edit node dialog.
						showMessage(
								Messages.get().EditNodeDialog_dialog_title,
								NLS.bind(
										Messages.get().EditNodeDialog_dialog_message,
										item.getText(HOSTNAME_COLUMN_INDEX)));
					} else if (item.getBounds(DELETE_COLUMN_INDEX).contains(pt)) {
						XSBMessageDialog deleteNodeDialog = new XSBMessageDialog(
								parent.getShell(),
								Messages.get().DeleteNodeDialog_dialog_title,
								NLS.bind(
										Messages.get().DeleteNodeDialog_dialog_message,
										item.getText(HOSTNAME_COLUMN_INDEX)),
								MessageDialog.WARNING,
								new String[] {
										Messages.get().DeleteNodeDialog_btn_delete,
										Messages.get().DeleteNodeDialog_btn_cancel });
						int deleteReturnCode = deleteNodeDialog.open();
						// 0 if delete pressed, 1 is do no delete pressed.
						if (deleteReturnCode == 0) {
							deleteNode(event.getSelection());
						}

					}
				}

			}
		});

		if (partSite != null) {
			// Make the selection available to other views
			partSite.setSelectionProvider(viewer);
		}

		// Layout the viewer
		GridData gridData = new GridData(GridData.FILL_BOTH);
		viewer.getControl().setLayoutData(gridData);
	}

	/**
	 * This will create the columns for the table.
	 * 
	 * @param parent
	 *            parent composite for the table.
	 * @param viewer
	 *            table viewer for the columns.
	 */
	private void createColumns(final Composite parent, final TableViewer viewer) {

		// First column is for the node hostname.
		TableViewerColumn col = createTableViewerColumn(HOSTNAME_COLUMN_TITLE);
		col.setLabelProvider(new ColumnLabelProvider() {
			@Override
			public String getText(final Object element) {
				NodeDTO p = (NodeDTO) element;
				return p.getNodeAddress();
			}
		});

		// Second column is for the node type.
		col = createTableViewerColumn(NODE_TYPE_COLUMN_TITLE);
		col.setLabelProvider(new ColumnLabelProvider() {
			@Override
			public String getText(final Object element) {
				NodeDTO p = (NodeDTO) element;
				return E_NodeTypes.getTypeByInt(p.getType());
			}
		});

		// Third column is for the username.
		col = createTableViewerColumn(USERNAME_COLUMN_TITLE);
		col.setLabelProvider(new ColumnLabelProvider() {
			@Override
			public String getText(final Object element) {
				NodeDTO p = (NodeDTO) element;
				return p.getUserName();
			}
		});

		// Fourth column is for the edit icon.
		col = createTableViewerColumn(EDIT_COLUMN_TITLE);
		col.setLabelProvider(new ColumnLabelProvider() {
			@Override
			public Image getImage(final Object element) {
				return Activator.getDefault().getImageRegistry()
						.get(IImageKeys.ICON_EDIT);
			}

			@Override
			public String getText(final Object element) {
				return "";
			}
		});
		col.getColumn().setText("");
		col.getColumn().setMoveable(false);
		col.getColumn().setResizable(false);

		// Fifth column is for the delete icon.
		col = createTableViewerColumn(DELETE_COLUMN_TITLE);
		col.setLabelProvider(new ColumnLabelProvider() {
			@Override
			public Image getImage(final Object element) {
				return Activator.getDefault().getImageRegistry()
						.get(IImageKeys.ICON_TRASH);
			}

			@Override
			public String getText(final Object element) {
				return "";
			}
		});
		col.getColumn().setText("");
		col.getColumn().setMoveable(false);
		col.getColumn().setResizable(false);

	}

	/**
	 * Sets the column weights.
	 * 
	 * @param table
	 *            table for the node list data.
	 */
	public void createColumnsWeigthData(Table table) {
		TableLayout layout = new TableLayout();
		layout.addColumnData(new ColumnWeightData(4, 100, true));
		layout.addColumnData(new ColumnWeightData(8, 100, true));
		layout.addColumnData(new ColumnWeightData(4, 100, true));
		layout.addColumnData(new ColumnWeightData(1, 30, false));
		layout.addColumnData(new ColumnWeightData(1, 30, false));
		table.setLayout(layout);

	}

	/**
	 * @param title
	 *            title of column.
	 * @return Table Viewer Column
	 */
	private TableViewerColumn createTableViewerColumn(final String title) {
		final TableViewerColumn viewerColumn = new TableViewerColumn(viewer,
				SWT.NONE);
		final TableColumn column = viewerColumn.getColumn();
		column.setText(title);
		// column.setWidth(bound);
		column.setResizable(true);
		column.setMoveable(true);
		column.setData(WidgetUtil.CUSTOM_WIDGET_ID,
				"Column_" + title.replaceAll(" ", ""));
		return viewerColumn;
	}

        /**
	 * Setup the action bars for menu and toobar.
	 */
	private void contributeToActionBars() {
		IActionBars bars = ((IViewSite) partSite).getActionBars();
		fillLocalPullDown(bars.getMenuManager());
		fillLocalToolBar(bars.getToolBarManager());
	}

	/**
	 * Adds the actions to the menu.
	 * 
	 * @param manager
	 *            menu manager
	 */
	private void fillLocalPullDown(final IMenuManager manager) {
		manager.add(addNodeAction);
	}

/**
	 * Adds the actions to the toolbar of the viewer..
	 * 
	 * @param manager
	 *            menu manager
	 */
	private void fillLocalToolBar(final IToolBarManager manager) {
		manager.add(addNodeAction);
	}

	/**
	 * Creates the actions. Currently only add node actions defined for viewer.
	 */
	private void makeActions() {
		addNodeAction = new Action() {
			public void run() {
				AddNodeDialog addNodeDialog = new AddNodeDialog(partSite
						.getWorkbenchWindow().getShell(),
						Messages.get().AddNodeDialog_dialog_title,
						nodeModelProvider);
				if (addNodeDialog.open() == Window.OK) {
					if (nodeModelProvider.getNodes().size() != 0) {
						viewer.setInput(nodeModelProvider.getNodes());
					}
					viewer.refresh();
					showMessage(
							Messages.get().MessageDialog_ConfirmAddNode_title,
							Messages.get().MessageDialog_ConfirmAddNode_message);
				}
			}
		};
		addNodeAction.setText("Add Node");
		addNodeAction.setToolTipText("Add Node");
		addNodeAction.setImageDescriptor(PlatformUI.getWorkbench()
				.getSharedImages()
				.getImageDescriptor(ISharedImages.IMG_OBJ_ADD));
	}

	/**
	 * Takes the selection from the tableviewer and casts to NodeDTO. Attempts
	 * to delete NodeDTO. The resets input of the tableviewer to the new list of
	 * nodes.
	 * 
	 * @param selection
	 *            node selected from the table viewer.
	 * @return true if node deleted. false otherwise.
	 */
	public final boolean deleteNode(final ISelection selection) {
		boolean nodeDeleted = false;

		if (selection != null && selection instanceof IStructuredSelection) {
			IStructuredSelection sel = (IStructuredSelection) selection;
			NodeDTO selectedNode = (NodeDTO) sel.iterator().next();

			nodeDeleted = nodeModelProvider.deleteNode(selectedNode
					.getNodeName());

			viewer.setInput(nodeModelProvider.getNodes());

			if (nodeDeleted) {
				showMessage(
						Messages.get().MessageDialog_ConfirmDeleteNode_title,
						NLS.bind(
								Messages.get().MessageDialog_ConfirmDeleteNode_message,
								selectedNode.getNodeAddress()));
			} else {
				showMessage(
						Messages.get().MessageDialog_ConfirmDeleteNode_title,
						NLS.bind(
								Messages.get().MessageDialog_ConfirmDeleteNode_failed_message,
								selectedNode.getNodeAddress()));
			}

		}

		return nodeDeleted;
	}

if (nodeDeleted) 
{
   // display message
   viewer.setSelection(StructuredSelection.EMPTY)
}
else
{
   // display message
}

// viewer.setInput(newInput);
viewer.refresh();

viewer.getControl().getDisplay().asycExec(new Runnable() {
   public void run() 
   {
      viewer.setSelection(StructuredSelection.EMPTY);
   }
});

if (nodeDeleted) {
    viewer.setSelection(StructuredSelection.EMPTY);
    showMessage(Messages.get().MessageDialog_ConfirmDeleteNode_title,
        NLS.bind(Messages.get().MessageDialog_ConfirmDeleteNode_message,
        selectedNode.getNodeAddress()));
    viewer.setInput(nodeModelProvider.getNodesFromDB());
}

if (nodeDeleted) {
    viewer.setSelection(StructuredSelection.EMPTY);
    viewer.setInput(nodeModelProvider.getNodesFromDB());
    showMessage(Messages.get().MessageDialog_ConfirmDeleteNode_title,
        NLS.bind(Messages.get().MessageDialog_ConfirmDeleteNode_message,
        selectedNode.getNodeAddress()));
    
}