Examples with ReflectiveColumnPropertyAccessor org.eclipse.nebula.widgets.nattable.data.ReflectiveColumnPropertyAccessor used on opensource projects

Example 36 with ReflectiveColumnPropertyAccessor

use of org.eclipse.nebula.widgets.nattable.data.ReflectiveColumnPropertyAccessor in project nebula.widgets.nattable by eclipse.

the class _5011_DataLayerExample method createExampleControl.

@Override
public Control createExampleControl(Composite parent) {
    parent.setLayout(new GridLayout());
    // property names of the Person class
    String[] propertyNames = { "firstName", "lastName", "gender", "married", "birthday" };
    IColumnPropertyAccessor<Person> columnPropertyAccessor = new ReflectiveColumnPropertyAccessor<>(propertyNames);
    IDataProvider bodyDataProvider = new ListDataProvider<>(PersonService.getPersons(10), columnPropertyAccessor);
    final DataLayer bodyDataLayer = new DataLayer(bodyDataProvider);
    // use different style bits to avoid rendering of inactive scrollbars
    // for small table
    // Note: The enabling/disabling and showing of the scrollbars is handled
    // by the ViewportLayer.
    // Without the ViewportLayer the scrollbars will always be visible with
    // the default
    // style bits of NatTable.
    final NatTable natTable = new NatTable(parent, SWT.NO_BACKGROUND | SWT.NO_REDRAW_RESIZE | SWT.DOUBLE_BUFFERED, bodyDataLayer);
    GridDataFactory.fillDefaults().grab(true, true).applyTo(natTable);
    Button b1 = new Button(parent, SWT.PUSH);
    b1.setText("Toggle column width");
    b1.addSelectionListener(new SelectionAdapter() {

        @Override
        public void widgetSelected(SelectionEvent e) {
            _5011_DataLayerExample.this.showDefaultColumnWidth = !_5011_DataLayerExample.this.showDefaultColumnWidth;
            if (_5011_DataLayerExample.this.showDefaultColumnWidth) {
                // reset to default
                bodyDataLayer.setColumnWidthByPosition(0, DataLayer.DEFAULT_COLUMN_WIDTH, false);
                bodyDataLayer.setColumnWidthByPosition(1, DataLayer.DEFAULT_COLUMN_WIDTH, false);
                bodyDataLayer.setColumnWidthByPosition(2, DataLayer.DEFAULT_COLUMN_WIDTH, false);
                bodyDataLayer.setColumnWidthByPosition(3, DataLayer.DEFAULT_COLUMN_WIDTH, false);
                // this one will trigger the refresh
                bodyDataLayer.setColumnWidthByPosition(4, DataLayer.DEFAULT_COLUMN_WIDTH, true);
            } else {
                bodyDataLayer.setColumnWidthByPosition(0, 70, false);
                bodyDataLayer.setColumnWidthByPosition(1, 70, false);
                bodyDataLayer.setColumnWidthByPosition(2, 50, false);
                bodyDataLayer.setColumnWidthByPosition(3, 30, false);
                // this one will trigger the refresh
                bodyDataLayer.setColumnWidthByPosition(4, 200, true);
            }
        }
    });
    Button b2 = new Button(parent, SWT.PUSH);
    b2.setText("Toggle row height");
    b2.addSelectionListener(new SelectionAdapter() {

        @Override
        public void widgetSelected(SelectionEvent e) {
            _5011_DataLayerExample.this.showDefaultRowHeight = !_5011_DataLayerExample.this.showDefaultRowHeight;
            if (_5011_DataLayerExample.this.showDefaultRowHeight) {
                // reset to default
                bodyDataLayer.setDefaultRowHeight(DataLayer.DEFAULT_ROW_HEIGHT);
            } else {
                bodyDataLayer.setDefaultRowHeight(50);
            }
            // repaint the table, as setting the default height is not
            // triggering a refresh automatically
            // this is because setting the default usually should be done
            // prior rendering
            natTable.refresh(false);
        }
    });
    return natTable;
}

Example 37 with ReflectiveColumnPropertyAccessor

use of org.eclipse.nebula.widgets.nattable.data.ReflectiveColumnPropertyAccessor in project nebula.widgets.nattable by eclipse.

the class _5052_RowSelectionExample method createExampleControl.

@Override
public Control createExampleControl(Composite parent) {
    // property names of the Person class
    String[] propertyNames = { "firstName", "lastName", "gender", "married", "birthday" };
    // mapping from property to label, needed for column header labels
    Map<String, String> propertyToLabelMap = new HashMap<>();
    propertyToLabelMap.put("firstName", "Firstname");
    propertyToLabelMap.put("lastName", "Lastname");
    propertyToLabelMap.put("gender", "Gender");
    propertyToLabelMap.put("married", "Married");
    propertyToLabelMap.put("birthday", "Birthday");
    IColumnPropertyAccessor<Person> columnPropertyAccessor = new ReflectiveColumnPropertyAccessor<>(propertyNames);
    final List<Person> data = PersonService.getPersons(10);
    // create the body layer stack
    IRowDataProvider<Person> bodyDataProvider = new ListDataProvider<>(data, columnPropertyAccessor);
    final DataLayer bodyDataLayer = new DataLayer(bodyDataProvider);
    // create a SelectionLayer without using the default configuration
    // this enables us to add the row selection configuration cleanly
    // afterwards
    final SelectionLayer selectionLayer = new SelectionLayer(bodyDataLayer, false);
    ViewportLayer viewportLayer = new ViewportLayer(selectionLayer);
    // use a RowSelectionModel that will perform row selections and is able
    // to identify a row via unique ID
    selectionLayer.setSelectionModel(new RowSelectionModel<>(selectionLayer, bodyDataProvider, new IRowIdAccessor<Person>() {

        @Override
        public Serializable getRowId(Person rowObject) {
            return rowObject.getId();
        }
    }));
    // register the DefaultRowSelectionLayerConfiguration that contains the
    // default styling and functionality bindings (search, tick update)
    // and different configurations for a move command handler that always
    // moves by a row and row only selection bindings
    selectionLayer.addConfiguration(new DefaultRowSelectionLayerConfiguration());
    // create the column header layer stack
    IDataProvider columnHeaderDataProvider = new DefaultColumnHeaderDataProvider(propertyNames, propertyToLabelMap);
    ILayer columnHeaderLayer = new ColumnHeaderLayer(new DataLayer(columnHeaderDataProvider), viewportLayer, selectionLayer);
    // create the row header layer stack
    IDataProvider rowHeaderDataProvider = new DefaultRowHeaderDataProvider(bodyDataProvider);
    ILayer rowHeaderLayer = new RowHeaderLayer(new DefaultRowHeaderDataLayer(new DefaultRowHeaderDataProvider(bodyDataProvider)), viewportLayer, selectionLayer);
    // create the corner layer stack
    ILayer cornerLayer = new CornerLayer(new DataLayer(new DefaultCornerDataProvider(columnHeaderDataProvider, rowHeaderDataProvider)), rowHeaderLayer, columnHeaderLayer);
    // create the grid layer composed with the prior created layer stacks
    GridLayer gridLayer = new GridLayer(viewportLayer, columnHeaderLayer, rowHeaderLayer, cornerLayer);
    return new NatTable(parent, gridLayer);
}

Example 38 with ReflectiveColumnPropertyAccessor

use of org.eclipse.nebula.widgets.nattable.data.ReflectiveColumnPropertyAccessor in project nebula.widgets.nattable by eclipse.

the class _5054_SelectionProviderExample method createExampleControl.

@Override
public Control createExampleControl(Composite parent) {
    Composite panel = new Composite(parent, SWT.NONE);
    panel.setLayout(new GridLayout(2, true));
    // property names of the Person class
    String[] propertyNames = { "lastName", "firstName" };
    // mapping from property to label, needed for column header labels
    Map<String, String> propertyToLabelMap = new HashMap<>();
    propertyToLabelMap.put("lastName", "Lastname");
    propertyToLabelMap.put("firstName", "Firstname");
    IColumnPropertyAccessor<Person> columnPropertyAccessor = new ReflectiveColumnPropertyAccessor<>(propertyNames);
    IRowIdAccessor<Person> rowIdAccessor = new IRowIdAccessor<Person>() {

        @Override
        public Serializable getRowId(Person rowObject) {
            return rowObject.getId();
        }
    };
    // create the first table
    // create the body layer stack
    final IRowDataProvider<Person> firstBodyDataProvider = new ListDataProvider<>(getSimpsonsList(), columnPropertyAccessor);
    final DataLayer firstBodyDataLayer = new DataLayer(firstBodyDataProvider);
    final SelectionLayer firstSelectionLayer = new SelectionLayer(firstBodyDataLayer);
    ViewportLayer firstViewportLayer = new ViewportLayer(firstSelectionLayer);
    // use a RowSelectionModel that will perform row selections and is able
    // to identify a row via unique ID
    firstSelectionLayer.setSelectionModel(new RowSelectionModel<>(firstSelectionLayer, firstBodyDataProvider, rowIdAccessor));
    // create the column header layer stack
    IDataProvider columnHeaderDataProvider = new DefaultColumnHeaderDataProvider(propertyNames, propertyToLabelMap);
    DataLayer firstColumnHeaderDataLayer = new DataLayer(columnHeaderDataProvider);
    ColumnHeaderLayer firstColumnHeaderLayer = new ColumnHeaderLayer(firstColumnHeaderDataLayer, firstViewportLayer, firstSelectionLayer);
    // register custom label styling to indicate if the table is active
    firstColumnHeaderDataLayer.setConfigLabelAccumulator(new IConfigLabelAccumulator() {

        @Override
        public void accumulateConfigLabels(LabelStack configLabels, int columnPosition, int rowPosition) {
            if (_5054_SelectionProviderExample.this.isFirstSelectionProvider) {
                configLabels.addLabelOnTop(ACTIVE_LABEL);
            }
        }
    });
    // set the region labels to make default configurations work, e.g.
    // selection
    CompositeLayer firstCompositeLayer = new CompositeLayer(1, 2);
    firstCompositeLayer.setChildLayer(GridRegion.COLUMN_HEADER, firstColumnHeaderLayer, 0, 0);
    firstCompositeLayer.setChildLayer(GridRegion.BODY, firstViewportLayer, 0, 1);
    final NatTable firstNatTable = new NatTable(panel, firstCompositeLayer, false);
    firstNatTable.addConfiguration(new DefaultNatTableStyleConfiguration());
    firstNatTable.addConfiguration(new ActiveTableStyleConfiguration());
    firstNatTable.configure();
    // set the modern theme
    firstNatTable.setTheme(new ModernNatTableThemeConfiguration());
    // add overlay painter for full borders
    firstNatTable.addOverlayPainter(new NatTableBorderOverlayPainter());
    // create the second table
    // create the body layer stack
    final IRowDataProvider<Person> secondBodyDataProvider = new ListDataProvider<>(getFlandersList(), columnPropertyAccessor);
    final DataLayer secondBodyDataLayer = new DataLayer(secondBodyDataProvider);
    final SelectionLayer secondSelectionLayer = new SelectionLayer(secondBodyDataLayer);
    ViewportLayer secondViewportLayer = new ViewportLayer(secondSelectionLayer);
    // use a RowSelectionModel that will perform row selections and is able
    // to identify a row via unique ID
    secondSelectionLayer.setSelectionModel(new RowSelectionModel<>(secondSelectionLayer, secondBodyDataProvider, rowIdAccessor));
    // create the column header layer stack
    DataLayer secondColumnHeaderDataLayer = new DataLayer(columnHeaderDataProvider);
    ILayer secondColumnHeaderLayer = new ColumnHeaderLayer(secondColumnHeaderDataLayer, secondViewportLayer, secondSelectionLayer);
    // register custom label styling to indicate if the table is active
    secondColumnHeaderDataLayer.setConfigLabelAccumulator(new IConfigLabelAccumulator() {

        @Override
        public void accumulateConfigLabels(LabelStack configLabels, int columnPosition, int rowPosition) {
            if (!_5054_SelectionProviderExample.this.isFirstSelectionProvider) {
                configLabels.addLabelOnTop(ACTIVE_LABEL);
            }
        }
    });
    // set the region labels to make default configurations work, e.g.
    // selection
    CompositeLayer secondCompositeLayer = new CompositeLayer(1, 2);
    secondCompositeLayer.setChildLayer(GridRegion.COLUMN_HEADER, secondColumnHeaderLayer, 0, 0);
    secondCompositeLayer.setChildLayer(GridRegion.BODY, secondViewportLayer, 0, 1);
    final NatTable secondNatTable = new NatTable(panel, secondCompositeLayer, false);
    secondNatTable.addConfiguration(new DefaultNatTableStyleConfiguration());
    secondNatTable.addConfiguration(new ActiveTableStyleConfiguration());
    secondNatTable.configure();
    // set the modern theme
    secondNatTable.setTheme(new ModernNatTableThemeConfiguration());
    // add overlay painter for full borders
    secondNatTable.addOverlayPainter(new NatTableBorderOverlayPainter());
    // set ISelectionProvider
    final RowSelectionProvider<Person> selectionProvider = new RowSelectionProvider<>(firstSelectionLayer, firstBodyDataProvider);
    // add a listener to the selection provider, in an Eclipse application
    // you would do this e.g. getSite().getPage().addSelectionListener()
    selectionProvider.addSelectionChangedListener(new ISelectionChangedListener() {

        @Override
        public void selectionChanged(SelectionChangedEvent event) {
            log("Selection changed:");
            IStructuredSelection selection = (IStructuredSelection) event.getSelection();
            @SuppressWarnings("rawtypes") Iterator it = selection.iterator();
            while (it.hasNext()) {
                Person selected = (Person) it.next();
                log("  " + selected.getFirstName() + " " + selected.getLastName());
            }
        }
    });
    // layout widgets
    GridDataFactory.fillDefaults().grab(true, true).applyTo(firstNatTable);
    GridDataFactory.fillDefaults().grab(true, true).applyTo(secondNatTable);
    // add a region for buttons
    Composite buttonArea = new Composite(panel, SWT.NONE);
    buttonArea.setLayout(new RowLayout());
    GridDataFactory.fillDefaults().grab(true, false).span(2, 1).applyTo(buttonArea);
    // create a button to enable selection provider change
    Button button = new Button(buttonArea, SWT.PUSH);
    button.setText("Change selection provider");
    button.addSelectionListener(new SelectionAdapter() {

        @Override
        public void widgetSelected(SelectionEvent e) {
            _5054_SelectionProviderExample.this.isFirstSelectionProvider = !_5054_SelectionProviderExample.this.isFirstSelectionProvider;
            if (_5054_SelectionProviderExample.this.isFirstSelectionProvider) {
                selectionProvider.updateSelectionProvider(firstSelectionLayer, firstBodyDataProvider);
            } else {
                selectionProvider.updateSelectionProvider(secondSelectionLayer, secondBodyDataProvider);
            }
            // refresh both tables to update the active rendering in the
            // column header/ this is not necessary for updating the
            // selection provider
            firstNatTable.doCommand(new VisualRefreshCommand());
            secondNatTable.doCommand(new VisualRefreshCommand());
        }
    });
    // add a log area to the example to show the log entries
    Text output = setupTextArea(panel);
    GridDataFactory.fillDefaults().grab(true, true).span(2, 1).applyTo(output);
    return panel;
}

Example 39 with ReflectiveColumnPropertyAccessor

use of org.eclipse.nebula.widgets.nattable.data.ReflectiveColumnPropertyAccessor in project nebula.widgets.nattable by eclipse.

the class _307_ChangeDataProviderExample method createExampleControl.

@Override
public Control createExampleControl(Composite parent) {
    // set the GridLayout because the FillLayout seems to introduce a
    // scrollbar rendering issue on changing the content
    parent.setLayout(new GridLayout());
    // property names of the Person class
    String[] personPropertyNames = { "firstName", "lastName", "gender", "married", "birthday" };
    // mapping from property to label, needed for column header labels
    Map<String, String> personPropertyToLabelMap = new HashMap<>();
    personPropertyToLabelMap.put("firstName", "Firstname");
    personPropertyToLabelMap.put("lastName", "Lastname");
    personPropertyToLabelMap.put("gender", "Gender");
    personPropertyToLabelMap.put("married", "Married");
    personPropertyToLabelMap.put("birthday", "Birthday");
    this.personBodyDataProvider = new ListDataProvider<>(PersonService.getPersons(10), new ReflectiveColumnPropertyAccessor<Person>(personPropertyNames));
    this.personColumnHeaderDataProvider = new DefaultColumnHeaderDataProvider(personPropertyNames, personPropertyToLabelMap);
    this.personRowHeaderDataProvider = new DefaultRowHeaderDataProvider(this.personBodyDataProvider);
    // property names of the Address class
    String[] addressPropertyNames = { "street", "housenumber", "postalCode", "city" };
    // mapping from property to label, needed for column header labels
    Map<String, String> addressPropertyToLabelMap = new HashMap<>();
    addressPropertyToLabelMap.put("street", "Street");
    addressPropertyToLabelMap.put("housenumber", "Housenumber");
    addressPropertyToLabelMap.put("postalCode", "Postal Code");
    addressPropertyToLabelMap.put("city", "City");
    this.addressBodyDataProvider = new ListDataProvider<>(PersonService.getAddress(20), new ReflectiveColumnPropertyAccessor<>(addressPropertyNames));
    this.addressColumnHeaderDataProvider = new DefaultColumnHeaderDataProvider(addressPropertyNames, addressPropertyToLabelMap);
    this.addressRowHeaderDataProvider = new DefaultRowHeaderDataProvider(this.addressBodyDataProvider);
    Composite panel = new Composite(parent, SWT.NONE);
    panel.setLayout(new GridLayout());
    GridDataFactory.fillDefaults().grab(true, true).applyTo(panel);
    Composite gridPanel = new Composite(panel, SWT.NONE);
    gridPanel.setLayout(new GridLayout());
    GridDataFactory.fillDefaults().grab(true, true).applyTo(gridPanel);
    Composite buttonPanel = new Composite(panel, SWT.NONE);
    buttonPanel.setLayout(new GridLayout());
    GridDataFactory.fillDefaults().grab(true, true).applyTo(buttonPanel);
    ConfigRegistry configRegistry = new ConfigRegistry();
    // create the body layer stack
    DataLayer bodyDataLayer = new DataLayer(this.personBodyDataProvider);
    bodyDataLayer.setConfigLabelAccumulator(this.personAccumulator);
    DefaultBodyLayerStack bodyLayerStack = new DefaultBodyLayerStack(bodyDataLayer);
    // create the column header layer stack
    DataLayer columnHeaderDataLayer = new DataLayer(this.personColumnHeaderDataProvider);
    ILayer columnHeaderLayer = new ColumnHeaderLayer(columnHeaderDataLayer, bodyLayerStack.getViewportLayer(), bodyLayerStack.getSelectionLayer());
    // create the row header layer stack
    DataLayer rowHeaderDataLayer = new DefaultRowHeaderDataLayer(this.personRowHeaderDataProvider);
    ILayer rowHeaderLayer = new RowHeaderLayer(rowHeaderDataLayer, bodyLayerStack.getViewportLayer(), bodyLayerStack.getSelectionLayer());
    // create the corner layer stack
    ILayer cornerLayer = new CornerLayer(new DataLayer(new DefaultCornerDataProvider(this.personColumnHeaderDataProvider, this.personRowHeaderDataProvider)), rowHeaderLayer, columnHeaderLayer);
    // create the grid layer composed with the prior created layer stacks
    GridLayer gridLayer = new GridLayer(bodyLayerStack, columnHeaderLayer, rowHeaderLayer, cornerLayer);
    final NatTable natTable = new NatTable(gridPanel, gridLayer, false);
    natTable.setConfigRegistry(configRegistry);
    natTable.addConfiguration(new DefaultNatTableStyleConfiguration());
    natTable.addConfiguration(new HeaderMenuConfiguration(natTable));
    natTable.addConfiguration(new SingleClickSortConfiguration());
    natTable.addConfiguration(new AbstractRegistryConfiguration() {

        @Override
        public void configureRegistry(IConfigRegistry configRegistry) {
            configRegistry.registerConfigAttribute(CellConfigAttributes.CELL_PAINTER, new CheckBoxPainter(), DisplayMode.NORMAL, "MARRIED");
            configRegistry.registerConfigAttribute(CellConfigAttributes.DISPLAY_CONVERTER, new DefaultDateDisplayConverter("yyyy-MM-dd"), DisplayMode.NORMAL, "DATE");
        }
    });
    natTable.configure();
    GridDataFactory.fillDefaults().grab(true, true).applyTo(natTable);
    Button showPersonsButton = new Button(buttonPanel, SWT.PUSH);
    showPersonsButton.setText("Show Persons");
    showPersonsButton.addSelectionListener(new SelectionAdapter() {

        @Override
        public void widgetSelected(SelectionEvent e) {
            bodyDataLayer.setDataProvider(_307_ChangeDataProviderExample.this.personBodyDataProvider);
            columnHeaderDataLayer.setDataProvider(_307_ChangeDataProviderExample.this.personColumnHeaderDataProvider);
            rowHeaderDataLayer.setDataProvider(_307_ChangeDataProviderExample.this.personRowHeaderDataProvider);
            bodyDataLayer.setConfigLabelAccumulator(_307_ChangeDataProviderExample.this.personAccumulator);
            natTable.doCommand(new RowHeightResetCommand(false));
            natTable.doCommand(new ColumnWidthResetCommand(false));
            natTable.refresh();
            natTable.getHorizontalBar().setVisible(false);
            natTable.getVerticalBar().setVisible(false);
        }
    });
    Button showAddressButton = new Button(buttonPanel, SWT.PUSH);
    showAddressButton.setText("Show Address");
    showAddressButton.addSelectionListener(new SelectionAdapter() {

        @Override
        public void widgetSelected(SelectionEvent e) {
            bodyDataLayer.setDataProvider(_307_ChangeDataProviderExample.this.addressBodyDataProvider);
            columnHeaderDataLayer.setDataProvider(_307_ChangeDataProviderExample.this.addressColumnHeaderDataProvider);
            rowHeaderDataLayer.setDataProvider(_307_ChangeDataProviderExample.this.addressRowHeaderDataProvider);
            bodyDataLayer.setConfigLabelAccumulator(null);
            natTable.doCommand(new RowHeightResetCommand(false));
            natTable.doCommand(new ColumnWidthResetCommand(false));
            natTable.refresh();
        }
    });
    return panel;
}

Example 40 with ReflectiveColumnPropertyAccessor

use of org.eclipse.nebula.widgets.nattable.data.ReflectiveColumnPropertyAccessor in project nebula.widgets.nattable by eclipse.

the class _5123_SummaryRowPositionExample method createExampleControl.

@Override
public Control createExampleControl(Composite parent) {
    Composite panel = new Composite(parent, SWT.NONE);
    GridLayout layout = new GridLayout();
    layout.verticalSpacing = 20;
    panel.setLayout(layout);
    // property names of the NumberValues class
    String[] propertyNames = { "columnOneNumber", "columnTwoNumber", "columnThreeNumber", "columnFourNumber", "columnFiveNumber" };
    IColumnPropertyAccessor<NumberValues> cpa = new ReflectiveColumnPropertyAccessor<>(propertyNames);
    IDataProvider dataProvider = new ListDataProvider<>(createNumberValueList(), cpa);
    ConfigRegistry configRegistry = new ConfigRegistry();
    // Summary row fixed on top
    DataLayer dataLayer = new DataLayer(dataProvider);
    ViewportLayer viewportLayer = new ViewportLayer(dataLayer);
    // Plug in the SummaryRowLayer
    FixedSummaryRowLayer summaryRowLayer = new FixedSummaryRowLayer(dataLayer, viewportLayer, configRegistry, false);
    summaryRowLayer.setHorizontalCompositeDependency(false);
    CompositeLayer composite = new CompositeLayer(1, 2);
    composite.setChildLayer("SUMMARY", summaryRowLayer, 0, 0);
    composite.setChildLayer(GridRegion.BODY, viewportLayer, 0, 1);
    NatTable natTable = new NatTable(panel, composite, false);
    GridDataFactory.fillDefaults().grab(true, true).applyTo(natTable);
    // Configure custom summary formula for a column
    natTable.addConfiguration(new ExampleSummaryRowConfiguration(dataProvider));
    natTable.addConfiguration(new DefaultNatTableStyleConfiguration());
    natTable.setConfigRegistry(configRegistry);
    natTable.configure();
    // Summary row fixed at the bottom
    dataLayer = new DataLayer(dataProvider);
    // IMPORTANT:
    // since the summary row layer is to the bottom of the viewport layer
    // we need to configure a GridLineCellLayerPainter that clips the top
    // cell. This means the body data layer is clipped at the bottom since
    // the painter is used globally
    dataLayer.setLayerPainter(new GridLineCellLayerPainter(false, true));
    viewportLayer = new ViewportLayer(dataLayer);
    // Plug in the SummaryRowLayer
    summaryRowLayer = new FixedSummaryRowLayer(dataLayer, viewportLayer, configRegistry, false);
    summaryRowLayer.setHorizontalCompositeDependency(false);
    composite = new CompositeLayer(1, 2);
    composite.setChildLayer(GridRegion.BODY, viewportLayer, 0, 0);
    composite.setChildLayer("SUMMARY", summaryRowLayer, 0, 1);
    natTable = new NatTable(panel, composite, false);
    GridDataFactory.fillDefaults().grab(true, true).applyTo(natTable);
    // Configure custom summary formula for a column
    natTable.addConfiguration(new ExampleSummaryRowConfiguration(dataProvider));
    natTable.addConfiguration(new DefaultNatTableStyleConfiguration());
    natTable.setConfigRegistry(configRegistry);
    natTable.configure();
    return panel;
}