Example usage for javax.swing.table TableCellRenderer getTableCellRendererComponent

List of usage examples for javax.swing.table TableCellRenderer getTableCellRendererComponent

Introduction

In this page you can find the example usage for javax.swing.table TableCellRenderer getTableCellRendererComponent.

Prototype

Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus,
        int row, int column);

Source Link

Document

Returns the component used for drawing the cell.

Usage

From source file:org.ut.biolab.medsavant.client.view.genetics.variantinfo.VariantFrequencyAggregatePane.java

public void setVariantRecords(Set<VariantRecord> records) {
    innerPanel.removeAll();/*  w  w w .j a v  a  2 s.co  m*/
    //This function executes quickly, no need for waitPanel.
    //innerPanel.add(new WaitPanel("Loading DNA Ids..."));
    tableModel.setValues(records);
    aggregateTable = new AggregateTable(tableModel) {
        @Override
        //Necessary to enable buttons within the table.
        public boolean isCellEditable(int rowIndex, int colIndex) {
            return colIndex == buttonIndex;
        }

        //"Disables" selection within the aggregateTable.
        @Override
        public TableCellRenderer getCellRenderer(final int rowIndex, final int columnIndex) {
            final TableCellRenderer renderer = super.getCellRenderer(rowIndex, columnIndex);
            return new TableCellRenderer() {
                @Override
                public Component getTableCellRendererComponent(JTable jtable, final Object o, boolean bln,
                        boolean bln1, int i, int i1) {
                    return renderer.getTableCellRendererComponent(jtable, o, false, false, i, i1);
                }
            };
        }

        //This overridden method, together with the custom mouse listener on the 
        //AggregateTable header, disallows moving the first column, and columns
        //>= dnaIDIndex                    
        @Override
        protected AggregateTable.DraggingHandler createDraggingColumnPropertyChangeListener() {
            return new AggregateTable.DraggingHandler() {
                @Override
                public void columnMoved(TableColumnModelEvent e) {
                    if (fromColumnIndex == -1) {
                        fromColumnIndex = e.getFromIndex();
                    }
                    toColumnIndex = e.getToIndex();
                }

            };
        }
    };

    header = new AggregateTableHeader(aggregateTable);
    header.addMouseListener(new MouseAdapter() {
        //Disable moving the first column, or columns with index
        //>=dnaIDIndex
        @Override
        public void mouseReleased(MouseEvent e) {
            if (toColumnIndex != -1 && ((toColumnIndex == 0 || fromColumnIndex == 0)
                    || (toColumnIndex >= dnaIDIndex || fromColumnIndex >= dnaIDIndex))) {
                aggregateTable.moveColumn(toColumnIndex, fromColumnIndex);
                String msg = "This column cannot be moved.";
                DialogUtils.displayMessage(msg);
            } else {
                for (int columnHeaderIndex = 0; columnHeaderIndex < header.getColumnModel().getColumnCount()
                        - 2; columnHeaderIndex++) {
                    String columnTitle = (String) header.getColumnModel().getColumn(columnHeaderIndex)
                            .getHeaderValue();
                    aggregateColumns[columnHeaderIndex] = columnTitle;
                }
                reaggregate();
            }
            //aggregateTable.aggregate(this.aggregateColumns);
            fromColumnIndex = -1;
            toColumnIndex = -1;
            //expandAllButLast();
        }
    });

    header.setAutoFilterEnabled(false);
    header.setReorderingAllowed(true);
    header.setFont(TABLE_FONT_LARGE);
    aggregateTable.setTableHeader(header);
    aggregateTable.setAutoResizeMode(AggregateTable.AUTO_RESIZE_ALL_COLUMNS);
    aggregateTable.setFont(TABLE_FONT_LARGE);

    //Setup a custom "summary".  This is what calculates frequencies when cells are
    //collapsed
    PivotField f = aggregateTable.getAggregateTableModel().getField(BasicVariantColumns.DNA_ID.getAlias());
    f.setSummaryType(PivotConstants.SUMMARY_RESERVED_MAX + 1);
    aggregateTable.getAggregateTableModel().setSummaryCalculator(new SummaryCalculator() {
        private Set<String> collapsedDNAIDs = new HashSet<String>();
        private Values lastRowValues;
        private int valueCount = 0;
        private final int SUMMARY_FREQ = PivotConstants.SUMMARY_RESERVED_MAX + 1;

        @Override
        public void addValue(PivotValueProvider dataModel, PivotField field, Values rowValues,
                Values columnValues, Object object) {
            //this gets called multiple times for all the cells that disappear when 
            //something is collapsed.  
            // row[0] is the value of the corresponding first column: e.g. a Cohort or Family. 
            // columnValues can be ignored (blank)
            // Object is the value of the item in the cell that disappeared. (i.e. those cells which are being summarized)
            // field.getName() is the column name corresponding to Object

            // Useful Debugging code:                      
            //if(field.getName().equals(BasicVariantColumns.DNA_ID.getAlias())){

            /*
             System.out.println("==========");
             System.out.println("Field : " + field.getName());
             System.out.println("Row values: ");
                    
             for (int i = 0; i < rowValues.getCount(); ++i) {
             System.out.println("\trow[" + i + "] = " + rowValues.getValueAt(i).getValue());
                    
             }
                    
             System.out.println("Column values: ");
             for (int i = 0; i < columnValues.getCount(); ++i) {
             System.out.println("\tcol[" + i + "] = " + columnValues.getValueAt(i).getValue());
             }
                    
             System.out.println("Object: ");
             System.out.println("\t" + object);
             System.out.println("==========");
             */

            // }
            if (field.getName().equals(BasicVariantColumns.DNA_ID.getAlias())) {
                collapsedDNAIDs.add((String) object);
                lastRowValues = rowValues;
            } else {
                lastRowValues = null;
            }
            valueCount++;
        }

        //Should never be called
        @Override
        public void addValue(Object o) {
            LOG.error("Unexpected method invocation in OtherIndividualsSubInspector (1)");
        }

        //Should never be called
        @Override
        public void addValue(IPivotDataModel ipdm, PivotField pf, int i, int i1, Object o) {
            LOG.error("Unexpected method invocation in OtherIndividualsSubInspector (2)");
        }

        //Should never be called
        @Override
        public void addValue(PivotValueProvider pvp, PivotField pf, Object o) {
            LOG.error("Unexpected method invocation in OtherIndividualsSubInspector (3)");
        }

        @Override
        public void clear() {
            collapsedDNAIDs.clear();
            valueCount = 0;
            lastRowValues = null;
        }

        @Override
        public Object getSummaryResult(int type) {
            //if null, then we're not in the DNAId column.  Return null
            //to show a blank in this cell
            if (lastRowValues == null) {
                return null;
            }

            int numIndividuals = getNumberOfIndividualsInGroup(lastRowValues.getValueAt(0));

            return new Frequency(collapsedDNAIDs.size(), numIndividuals);
        }

        private int getNumberOfIndividualsInGroup(Value v) {
            if (aggregateColumns[0].equals("Cohort")) {
                //LOG.debug("Getting number of individuals in group " + v.getValue());
                Set<String> dnaIds = cohortDNAIDMap.get((Cohort) v.getValue());
                //for (String id : dnaIds) {
                //LOG.debug("\tGot id " + id);
                //}
                return cohortDNAIDMap.get((Cohort) v.getValue()).size();
            } else if (aggregateColumns[0].equals(BasicPatientColumns.FAMILY_ID.getAlias())) {
                return familyIDdnaIDMap.get((String) v.getValue()).size();
            } else {
                LOG.error("Invalid first column");
                return -1;
            }
        }

        @Override
        public long getCount() {
            return valueCount;
        }

        @Override
        public int getNumberOfSummaries() {
            return 1;
        }

        @Override
        public String getSummaryName(Locale locale, int i) {
            return "Frequency";
        }

        @Override
        public int[] getAllowedSummaries(Class<?> type) {
            return new int[] { SUMMARY_FREQ };
        }

        @Override
        public int[] getAllowedSummaries(Class<?> type, ConverterContext cc) {
            return new int[] { SUMMARY_FREQ };
        }
    });

    //Sets up the context menu for clicking column headers.  This will probably not be used
    //frequently.  Limit the available operations to collapsing, expanding, and grouping.
    TableHeaderPopupMenuInstaller installer = new TableHeaderPopupMenuInstaller(aggregateTable);
    installer.addTableHeaderPopupMenuCustomizer(new AggregateTablePopupMenuCustomizer() {
        @Override
        public void customizePopupMenu(JTableHeader header, JPopupMenu popup, int clickingColumn) {
            super.customizePopupMenu(header, popup, clickingColumn);
            for (int i = 0; i < popup.getComponentCount(); i++) {
                String menuItemName = popup.getComponent(i).getName();
                if (!(CONTEXT_MENU_COLLAPSE.equals(menuItemName)
                        || CONTEXT_MENU_COLLAPSE_ALL.equals(menuItemName)
                        || CONTEXT_MENU_EXPAND.equals(menuItemName)
                        || CONTEXT_MENU_EXPAND_ALL.equals(menuItemName)
                        || CONTEXT_MENU_GROUP.equals(menuItemName)
                        || CONTEXT_MENU_UNGROUP.equals(menuItemName))) {

                    popup.remove(popup.getComponent(i));

                }
            }
        }
    });

    aggregateTable.getAggregateTableModel().setSummaryMode(true);

    aggregateTable.aggregate(aggregateColumns);
    aggregateTable.setShowContextMenu(false);

    expandAllButLast();
    setupButtonColumn();

    JScrollPane jsp = new JScrollPane(aggregateTable);
    jsp.setPreferredSize(PREFERRED_SIZE);

    JPanel bp = new JPanel();

    bp.setLayout(new BoxLayout(bp, BoxLayout.X_AXIS));
    JButton closeButton = new JButton(IconFactory.getInstance().getIcon(IconFactory.StandardIcon.CLOSE));
    closeButton.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent ae) {
            unsplitScreen();
        }
    });
    bp.add(Box.createHorizontalGlue());
    bp.add(title);
    bp.add(Box.createHorizontalGlue());
    bp.add(closeButton);
    innerPanel.add(bp);
    innerPanel.add(jsp);
    reaggregate();
    innerPanel.revalidate();
    innerPanel.repaint();
}

From source file:org.wandora.application.gui.OccurrenceTableSingleType.java

/** Creates a new instance of OccurrenceTableSingleType */
public OccurrenceTableSingleType(Topic topic, Topic type, Options options, Wandora wandora)
        throws TopicMapException {
    this.wandora = wandora;
    this.topic = topic;
    TopicMap tm = wandora.getTopicMap();

    try {/*from   ww  w  .jav a 2 s.c  o m*/
        Options opts = options;
        if (opts == null)
            opts = wandora.getOptions();
        if (opts != null) {
            tableType = opts.get(VIEW_OPTIONS_KEY);
            if (tableType == null || tableType.length() == 0)
                tableType = VIEW_SCHEMA;

            defaultRowHeight = opts.getInt(ROW_HEIGHT_OPTIONS_KEY);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

    this.type = type;

    HashSet<Topic> langSet = new LinkedHashSet();
    if (VIEW_USED.equalsIgnoreCase(tableType) || VIEW_USED_AND_SCHEMA.equalsIgnoreCase(tableType)) {
        Hashtable<Topic, String> occs = null;
        Topic langTopic = null;
        occs = topic.getData(type);
        for (Enumeration<Topic> keys = occs.keys(); keys.hasMoreElements();) {
            langTopic = keys.nextElement();
            langSet.add(langTopic);
        }
    }
    if (VIEW_SCHEMA.equalsIgnoreCase(tableType) || VIEW_USED_AND_SCHEMA.equalsIgnoreCase(tableType)) {
        Collection<Topic> langTopics = tm.getTopicsOfType(LANGUAGE_SI);
        langSet.addAll(langTopics);
    }

    langs = langSet.toArray(new Topic[langSet.size()]);
    data = new String[langs.length];
    originalData = new String[langs.length];
    colors = new Color[langs.length];

    for (int j = 0; j < langs.length; j++) {
        if (langs[j] != null) {
            data[j] = topic.getData(type, langs[j]);
            if (data[j] == null)
                data[j] = "";
            originalData[j] = data[j];
            colors[j] = wandora.topicHilights.getOccurrenceColor(topic, type, langs[j]);
        }
    }

    dataModel = new DataTableModel();
    sorter = new TableRowSorter(dataModel);

    final TableCellRenderer oldRenderer = this.getTableHeader().getDefaultRenderer();

    this.getTableHeader().setPreferredSize(new Dimension(100, 23));
    this.getTableHeader().setDefaultRenderer(new TableCellRenderer() {
        @Override
        public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
                boolean hasFocus, int row, int column) {
            Component c = oldRenderer.getTableCellRendererComponent(table, value, isSelected, hasFocus, row,
                    column);
            return c;
        }
    });

    this.setAutoCreateColumnsFromModel(false);

    TableColumn column = new TableColumn(0, 40, new TopicCellRenderer(), new TopicCellEditor());
    this.addColumn(column);
    column = new TableColumn(1, 400, new DataCellRenderer(), new DataCellEditor());
    this.addColumn(column);
    this.setTableHeader(this.getTableHeader());

    this.setModel(dataModel);
    this.setRowSorter(sorter);
    sorter.setSortsOnUpdates(true);

    updateRowHeights();

    popupStruct = WandoraMenuManager.getOccurrenceTableMenu(this, options);
    JPopupMenu popup = UIBox.makePopupMenu(popupStruct, wandora);
    this.setComponentPopupMenu(popup);
    this.addMouseListener(this);

    this.setColumnSelectionAllowed(false);
    this.setRowSelectionAllowed(false);
    this.setDragEnabled(true);
    this.setTransferHandler(new OccurrencesTableTransferHandler());
    this.setDropMode(DropMode.ON);
    this.createDefaultTableSelectionModel();
}

From source file:org.yccheok.jstock.gui.JTableUtilities.java

public static void makeTableColumnWidthFit(JTable jTable, int col, int margin, boolean locking) {
    // strategy - get max width for cells in column and
    // make that the preferred width
    TableColumnModel columnModel = jTable.getColumnModel();
    int maxwidth = 0;

    for (int row = 0; row < jTable.getRowCount(); row++) {
        TableCellRenderer rend = jTable.getCellRenderer(row, col);
        Object value = jTable.getValueAt(row, col);
        Component comp = rend.getTableCellRendererComponent(jTable, value, false, false, row, col);

        maxwidth = Math.max(comp.getPreferredSize().width + margin, maxwidth);
    } // for row/*from w w w  . j  a v  a  2s  . co  m*/

    TableColumn column = columnModel.getColumn(col);
    TableCellRenderer headerRenderer = column.getHeaderRenderer();
    if (headerRenderer == null) {
        headerRenderer = jTable.getTableHeader().getDefaultRenderer();
    }
    Object headerValue = column.getHeaderValue();
    Component headerComp = headerRenderer.getTableCellRendererComponent(jTable, headerValue, false, false, 0,
            col);

    maxwidth = Math.max(maxwidth, headerComp.getPreferredSize().width + margin);
    column.setPreferredWidth(maxwidth);
    if (locking) {
        // User will not able to adjust the width manually.
        column.setMinWidth(maxwidth);
        column.setMaxWidth(maxwidth);
    }
}

From source file:org.yccheok.jstock.gui.PortfolioManagementJPanel.java

private void initTreeTableDefaultRenderer(JXTreeTable treeTable) {
    final TableCellRenderer doubleOldTableCellRenderer = treeTable.getDefaultRenderer(Double.class);

    treeTable.setDefaultRenderer(Double.class, new DefaultTableCellRenderer() {
        @Override//from  ww  w  .j  a va 2s  .co  m
        public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
                boolean hasFocus, int row, int column) {
            final Component c = doubleOldTableCellRenderer.getTableCellRendererComponent(table, value,
                    isSelected, hasFocus, row, column);
            final String UNITS = GUIBundle.getString("PortfolioManagementJPanel_Units");
            // Do not manipulate display for "Units". We do not want 100
            // "units" displayed as 100.00 "units".
            if (false == UNITS.equals(table.getColumnName(column))) {
                if (value != null) {
                    if (c instanceof JLabel) {
                        // Re-define the displayed value.

                        // Ugly hacking.
                        if (value instanceof DoubleWrapper) {
                            DoubleWrapper v = (DoubleWrapper) value;
                            ((JLabel) c).setText(
                                    org.yccheok.jstock.portfolio.Utils.toCurrency(v.decimalPlace, v.value));
                        } else if (value instanceof DoubleWithCurrency) {
                            DoubleWithCurrency v = (DoubleWithCurrency) value;
                            Currency currency = v.currency();
                            String content = org.yccheok.jstock.portfolio.Utils.toCurrency(v.decimalPlace(),
                                    v.Double());
                            if (currency == null) {
                                ((JLabel) c).setText(content);
                            } else {
                                String prefix = currency.toString();
                                if (Currency.GBX.equals(prefix)) {
                                    // Special handling.
                                    prefix = Currency.GBP;
                                } else if (Currency.ZAC.equals(prefix)) {
                                    // Special handling.
                                    prefix = Currency.ZAR;
                                }

                                ((JLabel) c).setText(prefix + " " + content);
                            }
                        } else {
                            ((JLabel) c).setText(
                                    org.yccheok.jstock.portfolio.Utils.toCurrency(DecimalPlace.Four, value));
                        }
                    }
                }
            } else {
                if (value != null) {
                    if (c instanceof JLabel) {
                        ((JLabel) c).setText(org.yccheok.jstock.portfolio.Utils.toUnits(value));
                    }
                }
            }
            return c;
        }
    });

    treeTable.setDefaultRenderer(SimpleDate.class, new DefaultTableCellRenderer() {
        @Override
        public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
                boolean hasFocus, int row, int column) {
            final Component c = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row,
                    column);
            if (value != null) {
                if (c instanceof JLabel) {
                    DateFormat dateFormat = DateFormat.getDateInstance();
                    SimpleDate simpleDate = (SimpleDate) value;
                    ((JLabel) c).setText(dateFormat.format(simpleDate.getTime()));
                }
            }
            return c;
        }
    });
}

From source file:plugins.ImageRectificationPanel.java

public final void createGui() {
    this.removeAll();

    if (imageGCPsXCoords == null) {
        return;/* w  w  w.  j av  a2 s  .c  o m*/
    }
    int i;
    int newN = 0;
    for (i = 0; i < imageGCPsXCoords.length; i++) {
        if (useGCP[i]) {
            newN++;
        }
    }
    double[] X1 = new double[newN];
    double[] Y1 = new double[newN];
    double[] X2 = new double[newN];
    double[] Y2 = new double[newN];

    int j = 0;
    for (i = 0; i < imageGCPsXCoords.length; i++) {
        if (useGCP[i]) {
            X1[j] = imageGCPsXCoords[i];
            Y1[j] = imageGCPsYCoords[i];
            X2[j] = mapGCPsXCoords[i];
            Y2[j] = mapGCPsYCoords[i];
            j++;
        }
    }

    calculateEquations(X1, Y1, X2, Y2);

    // gui stuff
    this.setLayout(new BorderLayout());

    DecimalFormat df = new DecimalFormat("###,###,##0.000");

    JPanel buttonPane = new JPanel();
    buttonPane.setLayout(new BoxLayout(buttonPane, BoxLayout.X_AXIS));
    JButton btnOK = createButton(bundle.getString("OK"), bundle.getString("OK"), "ok");
    JButton btnExit = createButton(bundle.getString("Close"), bundle.getString("Close"), "close");
    //JButton btnRefresh = createButton("Cancel", "Cancel");

    buttonPane.add(Box.createHorizontalStrut(10));
    buttonPane.add(btnOK);
    buttonPane.add(Box.createHorizontalStrut(5));
    //buttonPane.add(btnRefresh);
    buttonPane.add(Box.createHorizontalStrut(5));
    buttonPane.add(btnExit);
    buttonPane.add(Box.createHorizontalGlue());

    progressBar = new JProgressBar(0, 100);
    buttonPane.add(progressBar);
    buttonPane.add(Box.createHorizontalStrut(5));
    cancel = new JLabel(bundle.getString("Cancel"));
    cancel.setForeground(Color.BLUE.darker());
    cancel.addMouseListener(this);
    buttonPane.add(cancel);
    buttonPane.add(Box.createHorizontalStrut(10));

    this.add(buttonPane, BorderLayout.SOUTH);

    Box mainBox = Box.createVerticalBox();
    mainBox.add(Box.createVerticalStrut(10));

    Box box1 = Box.createHorizontalBox();
    box1.add(Box.createHorizontalStrut(10));
    box1.add(new JLabel(bundle.getString("PolynomialOrder") + ": "));
    SpinnerModel model = new SpinnerNumberModel(polyOrder, //initial value
            1, //min
            5, //max
            1); //step

    polyOrderSpinner = new JSpinner(model);
    polyOrderSpinner.setPreferredSize(new Dimension(15, polyOrderSpinner.getPreferredSize().height));
    polyOrderSpinner.addChangeListener(this);

    JSpinner.DefaultEditor editor = (JSpinner.DefaultEditor) polyOrderSpinner.getEditor();
    editor.getTextField().setEnabled(true);
    editor.getTextField().setEditable(false);

    box1.add(polyOrderSpinner);
    box1.add(Box.createHorizontalGlue());
    JLabel label = new JLabel("RMSE: " + df.format(overallRMSE));
    box1.add(label);
    box1.add(Box.createHorizontalStrut(10));
    mainBox.add(box1);

    mainBox.add(Box.createVerticalStrut(10));

    // Create columns names
    int numPoints = imageGCPsXCoords.length;
    Object dataValues[][] = new Object[numPoints][7];
    j = 0;
    for (i = 0; i < numPoints; i++) {
        dataValues[i][0] = i + 1;
        dataValues[i][1] = df.format(imageGCPsXCoords[i]);
        dataValues[i][2] = df.format(imageGCPsYCoords[i]);
        dataValues[i][3] = df.format(mapGCPsXCoords[i]);
        dataValues[i][4] = df.format(mapGCPsYCoords[i]);
        if (useGCP[i]) {
            dataValues[i][5] = df.format(residualsXY[j]);
            j++;
        } else {
            dataValues[i][5] = null;
        }
        dataValues[i][6] = useGCP[i];
    }

    String columnNames[] = { "GCP", bundle.getString("Image") + " X", bundle.getString("Image") + " Y",
            bundle.getString("Map") + " X", bundle.getString("Map") + " Y", messages.getString("Error"),
            "Use" };

    DefaultTableModel tableModel = new DefaultTableModel(dataValues, columnNames);

    dataTable = new JTable(tableModel) {
        private static final long serialVersionUID = 1L;

        @Override
        public Class getColumnClass(int column) {
            switch (column) {
            case 0:
                return Integer.class;
            case 1:
                return String.class; //Double.class;
            case 2:
                return String.class; //Double.class;
            case 3:
                return String.class; //Double.class;
            case 4:
                return String.class; //Double.class;
            case 5:
                return String.class; //Double.class;
            case 6:
                return Boolean.class;
            default:
                return String.class; //Double.class;
            }
        }

        @Override
        public Component prepareRenderer(TableCellRenderer renderer, int index_row, int index_col) {
            Component comp = super.prepareRenderer(renderer, index_row, index_col);
            //even index, selected or not selected

            if (index_row % 2 == 0) {
                comp.setBackground(Color.WHITE);
                comp.setForeground(Color.BLACK);
            } else {
                comp.setBackground(new Color(225, 245, 255)); //new Color(210, 230, 255));
                comp.setForeground(Color.BLACK);
            }
            if (isCellSelected(index_row, index_col)) {
                comp.setForeground(Color.RED);
            }
            return comp;
        }
    };

    tableModel.addTableModelListener(this);

    TableCellRenderer rend = dataTable.getTableHeader().getDefaultRenderer();
    TableColumnModel tcm = dataTable.getColumnModel();
    //for (int j = 0; j < tcm.getColumnCount(); j += 1) {
    TableColumn tc = tcm.getColumn(0);
    TableCellRenderer rendCol = tc.getHeaderRenderer(); // likely null  
    if (rendCol == null) {
        rendCol = rend;
    }
    Component c = rendCol.getTableCellRendererComponent(dataTable, tc.getHeaderValue(), false, false, 0, 0);
    tc.setPreferredWidth(35);

    tc = tcm.getColumn(6);
    rendCol = tc.getHeaderRenderer(); // likely null  
    if (rendCol == null) {
        rendCol = rend;
    }
    c = rendCol.getTableCellRendererComponent(dataTable, tc.getHeaderValue(), false, false, 0, 6);
    tc.setPreferredWidth(35);

    JScrollPane scroll = new JScrollPane(dataTable);
    mainBox.add(scroll);

    this.add(mainBox, BorderLayout.CENTER);

    this.validate();
}