public void show(Component invoker, int x, int y) {
   Object o = getTree().getClosestPathForLocation(x, y).getLastPathComponent();
   if (null != o) {
     node = (Node) o;
     if ((node instanceof AttrConfig) || (node instanceof Config)) {
       newAttribute.setEnabled(true);
       duplicate.setEnabled(true);
       delete.setEnabled(true);
     } else {
       newAttribute.setEnabled(false);
       duplicate.setEnabled(false);
       delete.setEnabled(false);
     }
     super.show(invoker, x, y);
   }
 }
    public void show(Component invoker, int x, int y) {
      ViperViewMediator mediator = getMediator();
      Point pnt = new Point(x, y);
      EnhancedTable tab = getTable();
      int row = tab.rowAtPoint(pnt);
      desc = getCurrentModel().getDescriptorAtRow(row);
      int col = tab.columnAtPoint(pnt);
      Object cellValue = tab.getValueAt(row, col);
      if (cellValue instanceof Attribute) {
        attr = (Attribute) cellValue;

        // hide the "Occlusions..." option when we're not dealing with a Textline object
        boolean isTextline = attr.getAttrConfig().getAttrType().endsWith("textline");
        occlusions.setVisible(isTextline);
        occSeparator.setVisible(isTextline);

        Instant now = mediator.getCurrentFrame();
        if (now == null) {
          mediator.getDisplayWRTManager().setAttribute(null, null);
          wrt.setEnabled(false);
          wrt.setSelected(false);
        } else {
          boolean isDwrt = attr == mediator.getDisplayWRTManager().getAttribute();
          boolean dwrtable =
              (attr.getAttrValueAtInstant(now) instanceof HasCentroid
                  && attr.getDescriptor().getValidRange().contains(now));
          wrt.setEnabled(dwrtable);
          wrt.setSelected(isDwrt);
        }
      } else {
        attr = null;
        wrt.setEnabled(false);
        wrt.setSelected(false);
      }
      if (null != desc) {
        PropagateInterpolateModule proper = getMediator().getPropagator();
        p.setSelected(proper.isPropagatingThis(desc));
        v.setSelected(mediator.isThisValidNow(desc));
        resetMarks();
        super.show(invoker, x, y);
      }
    }
  // Handle some of the common steps between creating the content
  // and object tables.
  public AbstractViperTable(TablePanel tp) {
    super();
    this.outerTablePanel = tp;
    setLayout(new BorderLayout());
    EnhancedTable table =
        new EnhancedTable() {
          public void changeSelection(
              int rowIndex, int columnIndex, boolean toggle, boolean extend) {
            ViperTableModel currModel = AbstractViperTable.this.getCurrentModel();
            columnIndex = convertColumnIndexToModel(columnIndex);
            AttrConfig ac = currModel.getAttributeForColumn(columnIndex);
            Descriptor d = currModel.getDescriptorAtRow(rowIndex);
            Node n = null;
            if (ac != null) {
              Attribute a = d.getAttribute(ac);
              n = a;
            } else if (currModel.getInternalColumn(columnIndex) == ViperTableModel.BY_ID) {
              n = d;
            }
            if (n != null) {
              if (extend) {
                mediator.getSelection().addNode(n);
              } else {
                mediator.getSelection().setTo(n);
              }
            }
          }

          public boolean isCellSelected(int row, int column) {
            ViperTableModel currModel = AbstractViperTable.this.getCurrentModel();
            column = convertColumnIndexToModel(column);
            AttrConfig ac = currModel.getAttributeForColumn(column);
            Descriptor d = currModel.getDescriptorAtRow(row);
            if (ac != null) {
              Attribute a = d.getAttribute(ac);
              return mediator.getSelection().isSelected(a);
            } else if (currModel.getInternalColumn(column) == ViperTableModel.BY_ID) {
              return mediator.getSelection().isSelected(d);
            }
            return false;
          }
        };
    table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
    table.resizeAllColumnsToNaturalWidth();
    table.setCellSelectionBackground(
        table.getSelectionBackground().brighter().brighter().brighter());
    table.setCellSelectionForeground(table.getForeground().darker());
    initAttributeTable(table);
    JScrollPane scrollPane = new JScrollPane(table);
    this.add(scrollPane);
    popup = new DescPropPopup();
    popup.setInvoker(getTable());
    getTable()
        .addMouseListener(
            new MouseAdapter() {
              public void mousePressed(MouseEvent e) {
                maybeShowPopup(e);
              }

              public void mouseReleased(MouseEvent e) {
                maybeShowPopup(e);
              }
            });
  }