public void showAtts() {
    if (ds == null) return;
    if (attTable == null) {
      // global attributes
      attTable =
          new BeanTable(AttributeBean.class, (PreferencesExt) prefs.node("AttributeBeans"), false);
      PopupMenu varPopup = new ucar.nc2.ui.widget.PopupMenu(attTable.getJTable(), "Options");
      varPopup.addAction(
          "Show Attribute",
          new AbstractAction() {
            public void actionPerformed(ActionEvent e) {
              AttributeBean bean = (AttributeBean) attTable.getSelectedBean();
              if (bean != null) {
                infoTA.setText(bean.att.toString());
                infoTA.gotoTop();
                infoWindow.show();
              }
            }
          });
      attWindow =
          new IndependentWindow("Global Attributes", BAMutil.getImage("netcdfUI"), attTable);
      attWindow.setBounds(
          (Rectangle) prefs.getBean("AttWindowBounds", new Rectangle(300, 100, 500, 800)));
    }

    List<AttributeBean> attlist = new ArrayList<>();
    for (Attribute att : ds.getGlobalAttributes()) {
      attlist.add(new AttributeBean(att));
    }
    attTable.setBeans(attlist);
    attWindow.show();
  }
  private void showDeclaration(BeanTableSorted from, boolean isNcml) {
    Variable v = getCurrentVariable(from);
    if (v == null) return;
    infoTA.clear();
    if (isNcml) {
      Formatter out = new Formatter();
      try {
        NCdumpW.writeNcMLVariable(v, out);
      } catch (IOException e) {
        e.printStackTrace();
      }
      infoTA.appendLine(out.toString());

    } else {
      infoTA.appendLine(v.toString());
    }

    if (Debug.isSet("Xdeveloper")) {
      infoTA.appendLine("\n");
      infoTA.appendLine("FULL NAME = " + v.getFullName());
      infoTA.appendLine("\n");
      infoTA.appendLine(v.toStringDebug());
    }
    infoTA.gotoTop();
    infoWindow.setTitle("Variable Info");
    infoWindow.show();
  }
  private void compareDataset(CompareDialog.Data data) {
    if (data.name == null) return;

    NetcdfFile compareFile = null;
    try {
      compareFile = NetcdfDataset.openFile(data.name, null);

      Formatter f = new Formatter();
      CompareNetcdf2 cn = new CompareNetcdf2(f, data.showCompare, data.showDetails, data.readData);
      if (data.howMuch == CompareDialog.HowMuch.All) cn.compare(ds, compareFile);
      else {
        NestedTable nested = nestedTableList.get(0);
        Variable org = getCurrentVariable(nested.table);
        if (org == null) return;
        Variable ov = compareFile.findVariable(org.getFullNameEscaped());
        if (ov != null) cn.compareVariable(org, ov);
      }

      infoTA.setText(f.toString());
      infoTA.gotoTop();
      infoWindow.setTitle("Compare");
      infoWindow.show();

    } catch (Throwable ioe) {
      ByteArrayOutputStream bos = new ByteArrayOutputStream(10000);
      ioe.printStackTrace(new PrintStream(bos));
      infoTA.setText(bos.toString());
      infoTA.gotoTop();
      infoWindow.show();

    } finally {
      if (compareFile != null)
        try {
          compareFile.close();
        } catch (Exception eek) {
        }
    }
  }
  private void dataTable(BeanTableSorted from) {
    VariableBean vb = (VariableBean) from.getSelectedBean();
    if (vb == null) return;
    Variable v = vb.vs;
    if (v instanceof Structure) {
      try {
        dataTable.setStructure((Structure) v);
      } catch (Exception ex) {
        ex.printStackTrace();
      }
    } else return;

    dataWindow.show();
  }
  private void dumpData(BeanTableSorted from) {
    Variable v = getCurrentVariable(from);
    if (v == null) return;

    dumpPane.clear();
    String spec;

    try {
      spec = ParsedSectionSpec.makeSectionSpecString(v, null);
      dumpPane.setContext(ds, spec);

    } catch (Exception ex) {
      StringWriter s = new StringWriter();
      ex.printStackTrace(new PrintWriter(s));
      dumpPane.setText(s.toString());
    }

    dumpWindow.show();
  }