Examples with LabelStack org.eclipse.nebula.widgets.nattable.layer.LabelStack used on opensource projects

Example 71 with LabelStack

use of org.eclipse.nebula.widgets.nattable.layer.LabelStack in project nebula.widgets.nattable by eclipse.

the class FixedSummaryRowLayer method getConfigLabelsByPosition.

@Override
public LabelStack getConfigLabelsByPosition(int columnPosition, int rowPosition) {
    if (!isBodyColumn(columnPosition)) {
        LabelStack labelStack = this.horizontalLayerDependency.getConfigLabelsByPosition(columnPosition, this.horizontalLayerDependency.getRowCount() - 1);
        labelStack.addLabelOnTop(SummaryRowLayer.DEFAULT_SUMMARY_ROW_CONFIG_LABEL);
        if (getConfigLabelAccumulator() != null) {
            getConfigLabelAccumulator().accumulateConfigLabels(labelStack, columnPosition, rowPosition);
        }
        return labelStack;
    }
    int columnIndex = LayerUtil.convertColumnPosition(this.horizontalLayerDependency, columnPosition, (IUniqueIndexLayer) this.underlyingLayer);
    return super.getConfigLabelsByPosition(columnIndex, rowPosition);
}

Example 72 with LabelStack

use of org.eclipse.nebula.widgets.nattable.layer.LabelStack in project nebula.widgets.nattable by eclipse.

the class SummaryRowLayer method getConfigLabelsByPosition.

@Override
public LabelStack getConfigLabelsByPosition(int columnPosition, int rowPosition) {
    if (isSummaryRowPosition(rowPosition)) {
        // create a new LabelStack that takes the config labels into account
        LabelStack labelStack = new LabelStack();
        if (getConfigLabelAccumulator() != null) {
            getConfigLabelAccumulator().accumulateConfigLabels(labelStack, columnPosition, rowPosition);
        }
        labelStack.addLabelOnTop(DEFAULT_SUMMARY_ROW_CONFIG_LABEL);
        labelStack.addLabelOnTop(DEFAULT_SUMMARY_COLUMN_CONFIG_LABEL_PREFIX + columnPosition);
        return labelStack;
    }
    return super.getConfigLabelsByPosition(columnPosition, rowPosition);
}

Example 73 with LabelStack

use of org.eclipse.nebula.widgets.nattable.layer.LabelStack in project nebula.widgets.nattable by eclipse.

the class CellLabelMouseEventMatcher method matches.

@Override
public boolean matches(NatTable natTable, MouseEvent event, LabelStack regionLabels) {
    NatEventData eventData = NatEventData.createInstanceFromEvent(event);
    LabelStack customLabels = natTable.getConfigLabelsByPosition(eventData.getColumnPosition(), eventData.getRowPosition());
    return super.matches(natTable, event, regionLabels) && customLabels.getLabels().contains(this.labelToMatch);
}

Example 74 with LabelStack

use of org.eclipse.nebula.widgets.nattable.layer.LabelStack in project nebula.widgets.nattable by eclipse.

the class DarkExample method postConstruct.

@PostConstruct
public void postConstruct(Composite parent) {
    Composite container = new Composite(parent, SWT.NONE);
    container.setLayout(new GridLayout());
    // create a new ConfigRegistry which will be needed for GlazedLists
    // handling
    final ConfigRegistry configRegistry = new ConfigRegistry();
    // property names of the ExtendedPersonWithAddress class
    String[] propertyNames = { "firstName", "lastName", "age", "money", "married", "gender", "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("age", "Age");
    propertyToLabelMap.put("money", "Money");
    propertyToLabelMap.put("married", "Married");
    propertyToLabelMap.put("gender", "Gender");
    propertyToLabelMap.put("birthday", "Birthday");
    final IColumnPropertyAccessor<ExtendedPersonWithAddress> columnPropertyAccessor = new ExtendedReflectiveColumnPropertyAccessor<>(propertyNames);
    // to enable the group by summary feature, the GroupByDataLayer needs to
    // know the ConfigRegistry
    final BodyLayerStack<ExtendedPersonWithAddress> bodyLayerStack = new BodyLayerStack<>(PersonService.getExtendedPersonsWithAddress(10), columnPropertyAccessor, configRegistry);
    bodyLayerStack.getBodyDataLayer().setConfigLabelAccumulator(new ColumnLabelAccumulator(bodyLayerStack.getBodyDataProvider()));
    // build the column header layer
    IDataProvider columnHeaderDataProvider = new DefaultColumnHeaderDataProvider(propertyNames, propertyToLabelMap);
    DataLayer columnHeaderDataLayer = new DefaultColumnHeaderDataLayer(columnHeaderDataProvider);
    ColumnHeaderLayer columnHeaderLayer = new ColumnHeaderLayer(columnHeaderDataLayer, bodyLayerStack, bodyLayerStack.getSelectionLayer());
    // add sorting
    SortHeaderLayer<ExtendedPersonWithAddress> sortHeaderLayer = new SortHeaderLayer<>(columnHeaderLayer, new GlazedListsSortModel<>(bodyLayerStack.getSortedList(), columnPropertyAccessor, configRegistry, columnHeaderDataLayer), false);
    // connect sortModel to GroupByDataLayer to support sorting by group by
    // summary values
    bodyLayerStack.getBodyDataLayer().initializeTreeComparator(sortHeaderLayer.getSortModel(), bodyLayerStack.getTreeLayer(), true);
    ColumnGroupHeaderLayer columnGroupHeaderLayer = new ColumnGroupHeaderLayer(sortHeaderLayer, bodyLayerStack.getSelectionLayer(), columnGroupModel);
    columnGroupHeaderLayer.setCalculateHeight(true);
    // add the filter row functionality
    final FilterRowHeaderComposite<ExtendedPersonWithAddress> filterRowHeaderLayer = new FilterRowHeaderComposite<>(new DefaultGlazedListsFilterStrategy<>(bodyLayerStack.getFilterList(), columnPropertyAccessor, configRegistry), columnGroupHeaderLayer, columnHeaderDataLayer.getDataProvider(), configRegistry);
    // Row header
    // Adding the specialized DefaultSummaryRowHeaderDataProvider to
    // indicate the summary row in the row header
    IDataProvider rowHeaderDataProvider = new DefaultSummaryRowHeaderDataProvider(bodyLayerStack.getBodyDataLayer().getDataProvider(), "\u2211");
    final DataLayer rowHeaderDataLayer = new DefaultRowHeaderDataLayer(rowHeaderDataProvider);
    // add a label to the row header summary row cell aswell, so it can be
    // styled differently too
    // in this case it will simply use the same styling as the summary row
    // in the body
    rowHeaderDataLayer.setConfigLabelAccumulator(new AbstractOverrider() {

        @Override
        public void accumulateConfigLabels(LabelStack configLabels, int columnPosition, int rowPosition) {
            if ((rowPosition + 1) == rowHeaderDataLayer.getRowCount()) {
                configLabels.addLabel(ROW_HEADER_SUMMARY_ROW);
                configLabels.addLabel(SummaryRowLayer.DEFAULT_SUMMARY_ROW_CONFIG_LABEL);
            }
        }

        @Override
        public Collection<String> getProvidedLabels() {
            // make the custom labels available for the CSS engine
            Collection<String> result = super.getProvidedLabels();
            result.add(ROW_HEADER_SUMMARY_ROW);
            result.add(SummaryRowLayer.DEFAULT_SUMMARY_ROW_CONFIG_LABEL);
            return result;
        }
    });
    ILayer rowHeaderLayer = new RowHeaderLayer(rowHeaderDataLayer, bodyLayerStack, bodyLayerStack.getSelectionLayer());
    // build the corner layer
    IDataProvider cornerDataProvider = new DefaultCornerDataProvider(columnHeaderDataProvider, rowHeaderDataProvider);
    DataLayer cornerDataLayer = new DataLayer(cornerDataProvider);
    ILayer cornerLayer = new CornerLayer(cornerDataLayer, rowHeaderLayer, filterRowHeaderLayer);
    // build the grid layer
    GridLayer gridLayer = new GridLayer(bodyLayerStack, filterRowHeaderLayer, rowHeaderLayer, cornerLayer);
    // set the group by header on top of the grid
    CompositeLayer compositeGridLayer = new CompositeLayer(1, 2);
    final GroupByHeaderLayer groupByHeaderLayer = new GroupByHeaderLayer(bodyLayerStack.getGroupByModel(), gridLayer, columnHeaderDataProvider);
    compositeGridLayer.setChildLayer(GroupByHeaderLayer.GROUP_BY_REGION, groupByHeaderLayer, 0, 0);
    compositeGridLayer.setChildLayer("Grid", gridLayer, 0, 1);
    // turn the auto configuration off as we want to add our header menu
    // configuration
    final NatTable natTable = new NatTable(container, compositeGridLayer, false);
    // as the autoconfiguration of the NatTable is turned off, we have to
    // add the DefaultNatTableStyleConfiguration and the ConfigRegistry
    // manually
    natTable.setConfigRegistry(configRegistry);
    natTable.addConfiguration(new DefaultNatTableStyleConfiguration());
    // add sorting configuration
    natTable.addConfiguration(new SingleClickSortConfiguration());
    sumMoneySummaryProvider = new SummationGroupBySummaryProvider<>(columnPropertyAccessor);
    avgMoneySummaryProvider = new AverageMoneyGroupBySummaryProvider();
    // add group by summary configuration
    natTable.addConfiguration(new AbstractRegistryConfiguration() {

        @Override
        public void configureRegistry(IConfigRegistry configRegistry) {
            configRegistry.registerConfigAttribute(GroupByConfigAttributes.GROUP_BY_SUMMARY_PROVIDER, sumMoneySummaryProvider, DisplayMode.NORMAL, GroupByDataLayer.GROUP_BY_COLUMN_PREFIX + 3);
            configRegistry.registerConfigAttribute(GroupByConfigAttributes.GROUP_BY_SUMMARY_PROVIDER, new AverageAgeGroupBySummaryProvider(), DisplayMode.NORMAL, GroupByDataLayer.GROUP_BY_COLUMN_PREFIX + 2);
            configRegistry.registerConfigAttribute(GroupByConfigAttributes.GROUP_BY_CHILD_COUNT_PATTERN, "[{0}] - ({1})");
            configRegistry.registerConfigAttribute(GroupByConfigAttributes.GROUP_BY_HINT, "Drag columns here");
            // Note: GroupBy hint styling needs to be done programmatically
            // for now because we don't want to introduce a dependency
            // from CSS to GlazedLists. In a future version of NatTable the
            // basic GroupBy configurations will be moved to core
            // to make it possible to generate general configurations
            // without such a dependency.
            Style hintStyle = new Style();
            hintStyle.setAttributeValue(CellStyleAttributes.FONT, GUIHelper.getFont(new FontData("Arial", 10, SWT.ITALIC)));
            hintStyle.setAttributeValue(CellStyleAttributes.BACKGROUND_COLOR, GUIHelper.COLOR_BLACK);
            hintStyle.setAttributeValue(CellStyleAttributes.FOREGROUND_COLOR, GUIHelper.COLOR_WIDGET_DARK_SHADOW);
            configRegistry.registerConfigAttribute(GroupByConfigAttributes.GROUP_BY_HINT_STYLE, hintStyle);
            configRegistry.registerConfigAttribute(GroupByConfigAttributes.GROUP_BY_HEADER_BACKGROUND_COLOR, GUIHelper.COLOR_BLACK);
            configRegistry.registerConfigAttribute(SummaryRowConfigAttributes.SUMMARY_PROVIDER, new SummationSummaryProvider(bodyLayerStack.bodyDataProvider, false), DisplayMode.NORMAL, SummaryRowLayer.DEFAULT_SUMMARY_COLUMN_CONFIG_LABEL_PREFIX + 3);
            configRegistry.registerConfigAttribute(SummaryRowConfigAttributes.SUMMARY_PROVIDER, new AverageAgeSummaryProvider(bodyLayerStack.bodyDataProvider), DisplayMode.NORMAL, SummaryRowLayer.DEFAULT_SUMMARY_COLUMN_CONFIG_LABEL_PREFIX + 2);
            configRegistry.registerConfigAttribute(CellConfigAttributes.DISPLAY_CONVERTER, new SummaryDisplayConverter(new DefaultDoubleDisplayConverter()), DisplayMode.NORMAL, SummaryRowLayer.DEFAULT_SUMMARY_COLUMN_CONFIG_LABEL_PREFIX + 3);
        }
    });
    // add group by header configuration
    natTable.addConfiguration(new GroupByHeaderMenuConfiguration(natTable, groupByHeaderLayer));
    natTable.addConfiguration(new AbstractHeaderMenuConfiguration(natTable) {

        @Override
        protected PopupMenuBuilder createColumnHeaderMenu(NatTable natTable) {
            return super.createColumnHeaderMenu(natTable).withHideColumnMenuItem().withShowAllColumnsMenuItem().withColumnChooserMenuItem().withCreateColumnGroupsMenuItem().withUngroupColumnsMenuItem().withAutoResizeSelectedColumnsMenuItem().withColumnRenameDialog().withClearAllFilters().withStateManagerMenuItemProvider().withInspectLabelsMenuItem();
        }

        @Override
        protected PopupMenuBuilder createCornerMenu(NatTable natTable) {
            return super.createCornerMenu(natTable).withShowAllColumnsMenuItem().withStateManagerMenuItemProvider();
        }
    });
    natTable.addConfiguration(new DebugMenuConfiguration(natTable));
    natTable.configure();
    natTable.registerCommandHandler(new DisplayPersistenceDialogCommandHandler(natTable));
    DisplayColumnChooserCommandHandler columnChooserCommandHandler = new DisplayColumnChooserCommandHandler(bodyLayerStack.getSelectionLayer(), bodyLayerStack.getColumnHideShowLayer(), columnHeaderLayer, columnHeaderDataLayer, null, null);
    natTable.registerCommandHandler(columnChooserCommandHandler);
    GridDataFactory.fillDefaults().grab(true, true).applyTo(natTable);
    Composite buttonPanel = new Composite(container, SWT.NONE);
    buttonPanel.setLayout(new RowLayout());
    GridDataFactory.fillDefaults().grab(true, false).applyTo(buttonPanel);
    Button toggleHeaderButton = new Button(buttonPanel, SWT.PUSH);
    toggleHeaderButton.setText("Toggle Group By Header");
    toggleHeaderButton.addSelectionListener(new SelectionAdapter() {

        @Override
        public void widgetSelected(SelectionEvent e) {
            groupByHeaderLayer.setVisible(!groupByHeaderLayer.isVisible());
        }
    });
    Button toggleFilterButton = new Button(buttonPanel, SWT.PUSH);
    toggleFilterButton.setText("Toggle Filter Row");
    toggleFilterButton.addSelectionListener(new SelectionAdapter() {

        @Override
        public void widgetSelected(SelectionEvent e) {
            filterRowHeaderLayer.setFilterRowVisible(!filterRowHeaderLayer.isFilterRowVisible());
        }
    });
    Button collapseAllButton = new Button(buttonPanel, SWT.PUSH);
    collapseAllButton.setText("Collapse All");
    collapseAllButton.addSelectionListener(new SelectionAdapter() {

        @Override
        public void widgetSelected(SelectionEvent e) {
            natTable.doCommand(new TreeCollapseAllCommand());
        }
    });
    Button expandAllButton = new Button(buttonPanel, SWT.PUSH);
    expandAllButton.setText("Expand All");
    expandAllButton.addSelectionListener(new SelectionAdapter() {

        @Override
        public void widgetSelected(SelectionEvent e) {
            natTable.doCommand(new TreeExpandAllCommand());
        }
    });
    Button toggleMoneySummaryButton = new Button(buttonPanel, SWT.PUSH);
    toggleMoneySummaryButton.setText("Toggle Money Group Summary (SUM/AVG)");
    toggleMoneySummaryButton.addSelectionListener(new SelectionAdapter() {

        @Override
        public void widgetSelected(SelectionEvent e) {
            // clear the group by summary cache so the new summary
            // calculation gets triggered
            bodyLayerStack.getBodyDataLayer().clearCache();
            useMoneySum = !useMoneySum;
            if (useMoneySum) {
                configRegistry.registerConfigAttribute(GroupByConfigAttributes.GROUP_BY_SUMMARY_PROVIDER, sumMoneySummaryProvider, DisplayMode.NORMAL, GroupByDataLayer.GROUP_BY_COLUMN_PREFIX + 3);
            } else {
                configRegistry.registerConfigAttribute(GroupByConfigAttributes.GROUP_BY_SUMMARY_PROVIDER, avgMoneySummaryProvider, DisplayMode.NORMAL, GroupByDataLayer.GROUP_BY_COLUMN_PREFIX + 3);
            }
            natTable.doCommand(new VisualRefreshCommand());
        }
    });
    // this button adds data to the grid
    // try to group by last name, sort by last name desc and then add
    // dynamic data for verification
    Button addDynamicDataButton = new Button(buttonPanel, SWT.PUSH);
    addDynamicDataButton.setText("Add Data");
    addDynamicDataButton.addSelectionListener(new SelectionAdapter() {

        @Override
        public void widgetSelected(SelectionEvent e) {
            Address address = new Address();
            address.setStreet("Some Street");
            address.setHousenumber(42);
            address.setPostalCode(12345);
            address.setCity("In the clouds");
            Person person = new Person(42, "Ralph", "Wiggum", Gender.MALE, false, new Date());
            ExtendedPersonWithAddress entry = new ExtendedPersonWithAddress(person, address, "0000", "The little Ralphy", PersonService.createRandomMoneyAmount(), new ArrayList<String>(), new ArrayList<String>());
            bodyLayerStack.getEventList().add(entry);
            person = new Person(42, "Clancy", "Wiggum", Gender.MALE, true, new Date());
            entry = new ExtendedPersonWithAddress(person, address, "XXXL", "It is Chief Wiggum", PersonService.createRandomMoneyAmount(), new ArrayList<String>(), new ArrayList<String>());
            bodyLayerStack.getEventList().add(entry);
            person = new Person(42, "Sarah", "Wiggum", Gender.FEMALE, true, new Date());
            entry = new ExtendedPersonWithAddress(person, address, "mommy", "Little Ralphy's mother", PersonService.createRandomMoneyAmount(), new ArrayList<String>(), new ArrayList<String>());
            bodyLayerStack.getEventList().add(entry);
        }
    });
    natTable.setData("org.eclipse.e4.ui.css.CssClassName", "dark");
    showSourceLinks(container, getClass().getName());
}

Example 75 with LabelStack

use of org.eclipse.nebula.widgets.nattable.layer.LabelStack 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;
}