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## com.google.gwt.user.cellview.client
Class CellList<T>

    java.lang.Object
      com.google.gwt.user.client.ui.UIObject
          com.google.gwt.user.client.ui.Widget
              com.google.gwt.user.client.ui.Composite
                  com.google.gwt.user.cellview.client.AbstractHasData<T>
                      com.google.gwt.user.cellview.client.CellList<T>

Type Parameters:
  `T` - the data type of list items

All Implemented Interfaces:
  HasAttachHandlers, HasHandlers, HasKeyboardPagingPolicy, HasKeyboardSelectionPolicy, EventListener, Focusable, HasVisibility, IsRenderable, IsWidget, HasCellPreviewHandlers<T>, HasData<T>, HasKeyProvider<T>, HasRows

Direct Known Subclasses:
  CellBrowser.BrowserCellList

    public class CellList<T>

extends AbstractHasData<T>

A single column list of cells.

### Examples

Trivial example

  >     public class CellListExample implements EntryPoint {

  >       /**
  >        * The list of data to display.
  >        */
  >       private static final List<String> DAYS = Arrays.asList("Sunday", "Monday",
  >           "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday");

  >       public void onModuleLoad() {
  >         // Create a cell to render each value.
  >         TextCell textCell = new TextCell();

  >         // Create a CellList that uses the cell.
  >         CellList<String> cellList = new CellList<String>(textCell);
  >         cellList.setKeyboardSelectionPolicy(KeyboardSelectionPolicy.ENABLED);

  >         // Add a selection model to handle user selection.
  >         final SingleSelectionModel<String> selectionModel = new SingleSelectionModel<String>();
  >         cellList.setSelectionModel(selectionModel);
  >         selectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
  >           public void onSelectionChange(SelectionChangeEvent event) {
  >             String selected = selectionModel.getSelectedObject();
  >             if (selected != null) {
  >               Window.alert("You selected: " + selected);
  >             }
  >           }
  >         });

  >         // Set the total row count. This isn't strictly necessary, but it affects
  >         // paging calculations, so its good habit to keep the row count up to date.
  >         cellList.setRowCount(DAYS.size(), true);

  >         // Push the data into the widget.
  >         cellList.setRowData(0, DAYS);

  >         // Add it to the root panel.
  >         RootPanel.get().add(cellList);
  >       }
  >     }

Handling user input with ValueUpdater

  >     public class CellListValueUpdaterExample implements EntryPoint {

  >       /**
  >        * The list of data to display.
  >        */
  >       private static final List<String> DAYS = Arrays.asList("Sunday", "Monday",
  >           "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday");

  >       public void onModuleLoad() {
  >         // Create a cell that will interact with a value updater.
  >         TextInputCell inputCell = new TextInputCell();

  >         // Create a CellList that uses the cell.
  >         CellList<String> cellList = new CellList<String>(inputCell);

  >         // Create a value updater that will be called when the value in a cell
  >         // changes.
  >         ValueUpdater<String> valueUpdater = new ValueUpdater<String>() {
  >           public void update(String newValue) {
  >             Window.alert("You typed: " + newValue);
  >           }
  >         };

  >         // Add the value updater to the cellList.
  >         cellList.setValueUpdater(valueUpdater);

  >         // Set the total row count. This isn't strictly necessary, but it affects
  >         // paging calculations, so its good habit to keep the row count up to date.
  >         cellList.setRowCount(DAYS.size(), true);

  >         // Push the data into the widget.
  >         cellList.setRowData(0, DAYS);

  >         // Add it to the root panel.
  >         RootPanel.get().add(cellList);
  >       }
  >     }

Pushing data with List Data Provider (backed by `List`)

  >     public class ListDataProviderExample implements EntryPoint {

  >       public void onModuleLoad() {
  >         // Create a CellList.
  >         CellList<String> cellList = new CellList<String>(new TextCell());

  >         // Create a list data provider.
  >         final ListDataProvider<String> dataProvider = new ListDataProvider<String>();

  >         // Add the cellList to the dataProvider.
  >         dataProvider.addDataDisplay(cellList);

  >         // Create a form to add values to the data provider.
  >         final TextBox valueBox = new TextBox();
  >         valueBox.setText("Enter new value");
  >         Button addButton = new Button("Add value", new ClickHandler() {
  >           public void onClick(ClickEvent event) {
  >             // Get the value from the text box.
  >             String newValue = valueBox.getText();

  >             // Get the underlying list from data dataProvider.
  >             List<String> list = dataProvider.getList();

  >             // Add the value to the list. The dataProvider will update the cellList.
  >             list.add(newValue);
  >           }
  >         });

  >         // Add the widgets to the root panel.
  >         VerticalPanel vPanel = new VerticalPanel();
  >         vPanel.add(valueBox);
  >         vPanel.add(addButton);
  >         vPanel.add(cellList);
  >         RootPanel.get().add(vPanel);
  >       }
  >     }

Pushing data asynchronously with Async Data Provider

  >     public class AsyncDataProviderExample implements EntryPoint {

  >       /**
  >        * A custom {@link AsyncDataProvider}.
  >        */
  >       private static class MyDataProvider extends AsyncDataProvider<String> {
  >         /**
  >          * {@link #onRangeChanged(HasData)} is called when the table requests a new
  >          * range of data. You can push data back to the displays using
  >          * {@link #updateRowData(int, List)}.
  >          */
  >         @Override
  >         protected void onRangeChanged(HasData<String> display) {
  >           // Get the new range.
  >           final Range range = display.getVisibleRange();

  >           /*
  >            * Query the data asynchronously. If you are using a database, you can
  >            * make an RPC call here. We'll use a Timer to simulate a delay.
  >            */
  >           new Timer() {
  >             @Override
  >             public void run() {
  >               // We are creating fake data. Normally, the data will come from a
  >               // server.
  >               int start = range.getStart();
  >               int length = range.getLength();
  >               List<String> newData = new ArrayList<String>();
  >               for (int i = start; i < start + length; i++) {
  >                 newData.add("Item " + i);
  >               }

  >               // Push the data to the displays. AsyncDataProvider will only update
  >               // displays that are within range of the data.
  >               updateRowData(start, newData);
  >             }
  >           }.schedule(3000);
  >         }
  >       }

  >       public void onModuleLoad() {
  >         // Create a CellList.
  >         CellList<String> cellList = new CellList<String>(new TextCell());

  >         // Create a data provider.
  >         MyDataProvider dataProvider = new MyDataProvider();

  >         // Add the cellList to the dataProvider.
  >         dataProvider.addDataDisplay(cellList);

  >         // Create paging controls.
  >         SimplePager pager = new SimplePager();
  >         pager.setDisplay(cellList);

  >         // Add the widgets to the root panel.
  >         VerticalPanel vPanel = new VerticalPanel();
  >         vPanel.add(pager);
  >         vPanel.add(cellList);
  >         RootPanel.get().add(vPanel);
  >       }
  >     }

Writing a custom data provider

  >     public class RangeChangeHandlerExample implements EntryPoint {

  >       @Override
  >       public void onModuleLoad() {
  >         // Create a CellList.
  >         final CellList<String> cellList = new CellList<String>(new TextCell());

  >         // Add a range change handler.
  >         cellList.addRangeChangeHandler(new RangeChangeEvent.Handler() {
  >           @Override
  >           public void onRangeChange(RangeChangeEvent event) {
  >             Range range = event.getNewRange();
  >             int start = range.getStart();
  >             int length = range.getLength();

  >             // Create the data to push into the view. At this point, you could send
  >             // an asynchronous RPC request to a server.
  >             List<String> data = new ArrayList<String>();
  >             for (int i = start; i < start + length; i++) {
  >               data.add("Item " + i);
  >             }

  >             // Push the data into the list.
  >             cellList.setRowData(start, data);
  >           }
  >         });

  >         // Force the cellList to fire an initial range change event.
  >         cellList.setVisibleRangeAndClearData(new Range(0, 25), true);

  >         // Create paging controls.
  >         SimplePager pager = new SimplePager();
  >         pager.setDisplay(cellList);

  >         // Add the widgets to the root panel.
  >         VerticalPanel vPanel = new VerticalPanel();
  >         vPanel.add(pager);
  >         vPanel.add(cellList);
  >         RootPanel.get().add(vPanel);
  >       }
  >     }

Using a key provider to track objects as they change

  >     public class KeyProviderExample implements EntryPoint {

  >       /**
  >        * A simple data type that represents a contact.
  >        */
  >       private static class Contact {
  >         private static int nextId = 0;

  >         private final int id;
  >         private String name;

  >         public Contact(String name) {
  >           nextId++;
  >           this.id = nextId;
  >           this.name = name;
  >         }
  >       }

  >       /**
  >        * A custom {@link Cell} used to render a {@link Contact}.
  >        */
  >       private static class ContactCell extends AbstractCell<Contact> {
  >         @Override
  >         public void render(Context context, Contact value, SafeHtmlBuilder sb) {
  >           if (value != null) {
  >             sb.appendEscaped(value.name);
  >           }
  >         }
  >       }

  >       /**
  >        * The list of data to display.
  >        */
  >       private static final List<Contact> CONTACTS = Arrays.asList(new Contact(
  >           "John"), new Contact("Joe"), new Contact("Michael"),
  >           new Contact("Sarah"), new Contact("George"));

  >       public void onModuleLoad() {
  >         /*
  >          * Define a key provider for a Contact. We use the unique ID as the key,
  >          * which allows to maintain selection even if the name changes.
  >          */
  >         ProvidesKey<Contact> keyProvider = new ProvidesKey<Contact>() {
  >           public Object getKey(Contact item) {
  >             // Always do a null check.
  >             return (item == null) ? null : item.id;
  >           }
  >         };

  >         // Create a CellList using the keyProvider.
  >         CellList<Contact> cellList = new CellList<Contact>(new ContactCell(),
  >             keyProvider);

  >         // Push data into the CellList.
  >         cellList.setRowCount(CONTACTS.size(), true);
  >         cellList.setRowData(0, CONTACTS);

  >         // Add a selection model using the same keyProvider.
  >         SelectionModel<Contact> selectionModel = new SingleSelectionModel<Contact>(
  >             keyProvider);
  >         cellList.setSelectionModel(selectionModel);

  >         /*
  >          * Select a contact. The selectionModel will select based on the ID because
  >          * we used a keyProvider.
  >          */
  >         Contact sarah = CONTACTS.get(3);
  >         selectionModel.setSelected(sarah, true);

  >         // Modify the name of the contact.
  >         sarah.name = "Sara";

  >         /*
  >          * Redraw the CellList. Sarah/Sara will still be selected because we
  >          * identify her by ID. If we did not use a keyProvider, Sara would not be
  >          * selected.
  >          */
  >         cellList.redraw();

  >         // Add the widgets to the root panel.
  >         RootPanel.get().add(cellList);
  >       }
  >     }

Nested Class Summary
`static interface` | `CellList.Resources` A ClientBundle that provides images for this widget.
`static interface` | `CellList.Style` Styles used by this widget.
`(package private) static interface` | `CellList.Template`

Nested classes/interfaces inherited from class com.google.gwt.user.cellview.client.AbstractHasData
`AbstractHasData.DefaultKeyboardSelectionHandler<T>`

Nested classes/interfaces inherited from class com.google.gwt.user.client.ui.UIObject
`UIObject.DebugIdImpl, UIObject.DebugIdImplEnabled`

Nested classes/interfaces inherited from interface com.google.gwt.user.cellview.client.HasKeyboardPagingPolicy
`HasKeyboardPagingPolicy.KeyboardPagingPolicy`

Nested classes/interfaces inherited from interface com.google.gwt.user.cellview.client.HasKeyboardSelectionPolicy
`HasKeyboardSelectionPolicy.KeyboardSelectionPolicy`

Field Summary

Fields inherited from class com.google.gwt.user.cellview.client.AbstractHasData
`isFocused`

Fields inherited from class com.google.gwt.user.client.ui.UIObject
`DEBUG_ID_PREFIX`

Constructor Summary
`CellList(Cell<T> cell)` Construct a new `CellList`.
`CellList(Cell<T> cell, CellList.Resources resources)` Construct a new `CellList` with the specified `CellList.Resources`.
`CellList(Cell<T> cell, CellList.Resources resources, ProvidesKey<T> keyProvider)` Construct a new `CellList` with the specified `CellList.Resources` and `key provider`.
`CellList(Cell<T> cell, ProvidesKey<T> keyProvider)` Construct a new `CellList` with the specified `key provider`.

Method Summary
`protected boolean` | `dependsOnSelection()` Check whether or not the cells in the view depend on the selection state.
`protected void` | `doAttachChildren()` If a widget contains one or more child widgets that are not in the logical widget hierarchy (the child is physically connected only on the DOM level), it must override this method and call `Widget.onAttach()` for each of its child widgets.
`protected void` | `doDetachChildren()` If a widget contains one or more child widgets that are not in the logical widget hierarchy (the child is physically connected only on the DOM level), it must override this method and call `Widget.onDetach()` for each of its child widgets.
`protected void` | `fireEventToCell(Cell.Context context, Event event, Element parent, T value)` Fire an event to the cell.
`protected Cell<T>` | `getCell()` Return the cell used to render each item.
`protected Element` | `getCellParent(Element item)` Get the parent element that wraps the cell from the list item.
`protected Element` | `getChildContainer()` Return the element that holds the rendered cells.
`SafeHtml` | `getEmptyListMessage()` Deprecated. as of GWT 2.3, use `getEmptyListWidget()` instead
`Widget` | `getEmptyListWidget()` Get the widget displayed when the list has no rows.
`protected Element` | `getKeyboardSelectedElement()` Get the element that has keyboard selection.
`Widget` | `getLoadingIndicator()` Get the widget displayed when the data is loading.
`Element` | `getRowElement(int indexOnPage)` Get the `Element` for the specified index.
`protected boolean` | `isKeyboardNavigationSuppressed()` Check if keyboard navigation is being suppressed, such as when the user is editing a cell.
`protected void` | `onBrowserEvent2(Event event)` Called after `AbstractHasData.onBrowserEvent(Event)` completes.
`protected void` | `onLoadingStateChanged(LoadingStateChangeEvent.LoadingState state)` Called when the loading state changes.
`protected void` | `renderRowValues(SafeHtmlBuilder sb, java.util.List<T> values, int start, SelectionModel<? super T> selectionModel)` Render all row values into the specified `SafeHtmlBuilder`.
`protected boolean` | `resetFocusOnCell()` Reset focus on the currently focused cell.
`void` | `setEmptyListMessage(SafeHtml html)` Deprecated. as of GWT 2.3, use `setEmptyListWidget(com.google.gwt.user.client.ui.Widget)` instead
`void` | `setEmptyListWidget(Widget widget)` Set the widget to display when the list has no rows.
`protected void` | `setKeyboardSelected(int index, boolean selected, boolean stealFocus)` Update an element to reflect its keyboard selected state.
`void` | `setLoadingIndicator(Widget widget)` Set the widget to display when the data is loading.
`protected void` | `setSelected(Element elem, boolean selected)` Deprecated. this method is never called by AbstractHasData, render the selected styles in `renderRowValues(SafeHtmlBuilder, List, int, SelectionModel)`
`void` | `setValueUpdater(ValueUpdater<T> valueUpdater)` Set the value updater to use when cells modify items.

Methods inherited from class com.google.gwt.user.cellview.client.AbstractHasData
`addCellPreviewHandler, addLoadingStateChangeHandler, addRangeChangeHandler, addRowCountChangeHandler, addValueChangeHandler, adopt, cellConsumesEventType, checkRowBounds, convertToElements, convertToElements, doAttach, doDetach, getAccessKey, getChildElement, getDisplayedItem, getDisplayedItems, getKeyboardPagingPolicy, getKeyboardSelectedRow, getKeyboardSelectionPolicy, getKeyProvider, getPageSize, getPageStart, getPresenter, getRowContainer, getRowCount, getSelectionModel, getTabIndex, getValueKey, getVisibleItem, getVisibleItemCount, getVisibleItems, getVisibleRange, isRowCountExact, isRowWithinBounds, onBlur, onBrowserEvent, onFocus, onUnload, redraw, redrawRow, replaceAllChildren, replaceAllChildren, replaceChildren, replaceChildren, setAccessKey, setFocus, setFocusable, setKeyboardPagingPolicy, setKeyboardSelectedRow, setKeyboardSelectedRow, setKeyboardSelectionHandler, setKeyboardSelectionPolicy, setPageSize, setPageStart, setRowCount, setRowCount, setRowData, setRowData, setSelectionModel, setSelectionModel, setTabIndex, setVisibleRange, setVisibleRange, setVisibleRangeAndClearData, showOrHide`

Methods inherited from class com.google.gwt.user.client.ui.Composite
`claimElement, getWidget, initializeClaimedElement, initWidget, isAttached, onAttach, onDetach, render, render, resolvePotentialElement, setWidget`

Methods inherited from class com.google.gwt.user.client.ui.Widget
`addAttachHandler, addBitlessDomHandler, addDomHandler, addHandler, asWidget, asWidgetOrNull, createHandlerManager, delegateEvent, fireEvent, getHandlerCount, getLayoutData, getParent, isOrWasAttached, onLoad, removeFromParent, setLayoutData, sinkEvents, unsinkEvents`

Methods inherited from class com.google.gwt.user.client.ui.UIObject
`addStyleDependentName, addStyleName, ensureDebugId, ensureDebugId, ensureDebugId, getAbsoluteLeft, getAbsoluteTop, getElement, getOffsetHeight, getOffsetWidth, getStyleElement, getStyleName, getStyleName, getStylePrimaryName, getStylePrimaryName, getTitle, isVisible, isVisible, onEnsureDebugId, removeStyleDependentName, removeStyleName, setElement, setElement, setHeight, setPixelSize, setSize, setStyleDependentName, setStyleName, setStyleName, setStyleName, setStyleName, setStylePrimaryName, setStylePrimaryName, setTitle, setVisible, setVisible, setWidth, sinkBitlessEvent, toString`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Methods inherited from interface com.google.gwt.event.shared.HasHandlers
`fireEvent`

Constructor Detail

### CellList

    public CellList(Cell<T> cell)

  Construct a new `CellList`.

  Parameters:
    `cell` - the cell used to render each item

### CellList

    public CellList(Cell<T> cell,
                    CellList.Resources resources)

  Construct a new `CellList` with the specified `CellList.Resources`.

  Parameters:
    `cell` - the cell used to render each item
    `resources` - the resources used for this widget

### CellList

    public CellList(Cell<T> cell,
                    ProvidesKey<T> keyProvider)

  Construct a new `CellList` with the specified `key provider`.

  Parameters:
    `cell` - the cell used to render each item
    `keyProvider` - an instance of ProvidesKey, or null if the record object should act as its own key

### CellList

    public CellList(Cell<T> cell,
                    CellList.Resources resources,
                    ProvidesKey<T> keyProvider)

  Construct a new `CellList` with the specified `CellList.Resources` and `key provider`.

  Parameters:
    `cell` - the cell used to render each item
    `resources` - the resources used for this widget
    `keyProvider` - an instance of ProvidesKey, or null if the record object should act as its own key

Method Detail

### getEmptyListMessage

    @Deprecated
    public SafeHtml getEmptyListMessage()

  Deprecated. as of GWT 2.3, use `getEmptyListWidget()` instead

  Get the message that is displayed when there is no data.

  Returns:
    the empty message
  See Also:
    `setEmptyListMessage(SafeHtml)`

### getEmptyListWidget

    public Widget getEmptyListWidget()

  Get the widget displayed when the list has no rows.

  Returns:
    the empty list widget

### getLoadingIndicator

    public Widget getLoadingIndicator()

  Get the widget displayed when the data is loading.

  Returns:
    the loading indicator

### getRowElement

    public Element getRowElement(int indexOnPage)

  Get the `Element` for the specified index. If the element has not been created, null is returned.

  Parameters:
    `indexOnPage` - the index on the page
  Returns:
    the element, or null if it doesn't exists
  Throws:
    `java.lang.IndexOutOfBoundsException` - if the index is outside of the current page

### setEmptyListMessage

    @Deprecated
    public void setEmptyListMessage(SafeHtml html)

  Deprecated. as of GWT 2.3, use `setEmptyListWidget(com.google.gwt.user.client.ui.Widget)` instead

  Set the message to display when there is no data.

  Parameters:
    `html` - the message to display when there are no results
  See Also:
    `getEmptyListMessage()`

### setEmptyListWidget

    public void setEmptyListWidget(Widget widget)

  Set the widget to display when the list has no rows.

  Parameters:
    `widget` - the empty data widget

### setLoadingIndicator

    public void setLoadingIndicator(Widget widget)

  Set the widget to display when the data is loading.

  Parameters:
    `widget` - the loading indicator

### setValueUpdater

    public void setValueUpdater(ValueUpdater<T> valueUpdater)

  Set the value updater to use when cells modify items.

  Parameters:
    `valueUpdater` - the `ValueUpdater`

### dependsOnSelection

    protected boolean dependsOnSelection()

  Description copied from class: `AbstractHasData`
  Check whether or not the cells in the view depend on the selection state.

  Specified by:
    `dependsOnSelection` in class `AbstractHasData<T>`
  Returns:
    true if cells depend on selection, false if not

### doAttachChildren

    protected void doAttachChildren()

  Description copied from class: `Widget`
  If a widget contains one or more child widgets that are not in the logical widget hierarchy (the child is physically connected only on the DOM level), it must override this method and call `Widget.onAttach()` for each of its child widgets.

  Overrides:
    `doAttachChildren` in class `Widget`
  See Also:
    `Widget.onAttach()`

### doDetachChildren

    protected void doDetachChildren()

  Description copied from class: `Widget`
  If a widget contains one or more child widgets that are not in the logical widget hierarchy (the child is physically connected only on the DOM level), it must override this method and call `Widget.onDetach()` for each of its child widgets.

  Overrides:
    `doDetachChildren` in class `Widget`
  See Also:
    `Widget.onDetach()`

### fireEventToCell

    protected void fireEventToCell(Cell.Context context,
                                   Event event,
                                   Element parent,
                                   T value)

  Fire an event to the cell.

  Parameters:
    `context` - the `Cell.Context` of the cell
    `event` - the event that was fired
    `parent` - the parent of the cell
    `value` - the value of the cell

### getCell

    protected Cell<T> getCell()

  Return the cell used to render each item.

### getCellParent

    protected Element getCellParent(Element item)

  Get the parent element that wraps the cell from the list item. Override this method if you add structure to the element.

  Parameters:
    `item` - the row element that wraps the list item
  Returns:
    the parent element of the cell

### getChildContainer

    protected Element getChildContainer()

  Description copied from class: `AbstractHasData`
  Return the element that holds the rendered cells.

  Specified by:
    `getChildContainer` in class `AbstractHasData<T>`
  Returns:
    the container `Element`

### getKeyboardSelectedElement

    protected Element getKeyboardSelectedElement()

  Description copied from class: `AbstractHasData`
  Get the element that has keyboard selection.

  Specified by:
    `getKeyboardSelectedElement` in class `AbstractHasData<T>`
  Returns:
    the keyboard selected element

### isKeyboardNavigationSuppressed

    protected boolean isKeyboardNavigationSuppressed()

  Description copied from class: `AbstractHasData`
  Check if keyboard navigation is being suppressed, such as when the user is editing a cell.

  Specified by:
    `isKeyboardNavigationSuppressed` in class `AbstractHasData<T>`
  Returns:
    true if suppressed, false if not

### onBrowserEvent2

    protected void onBrowserEvent2(Event event)

  Description copied from class: `AbstractHasData`
  Called after `AbstractHasData.onBrowserEvent(Event)` completes.

  Overrides:
    `onBrowserEvent2` in class `AbstractHasData<T>`
  Parameters:
    `event` - the event that was fired

### onLoadingStateChanged

    protected void onLoadingStateChanged(LoadingStateChangeEvent.LoadingState state)

  Called when the loading state changes.

  Overrides:
    `onLoadingStateChanged` in class `AbstractHasData<T>`
  Parameters:
    `state` - the new loading state

### renderRowValues

    protected void renderRowValues(SafeHtmlBuilder sb,
                                   java.util.List<T> values,
                                   int start,
                                   SelectionModel<? super T> selectionModel)

  Description copied from class: `AbstractHasData`
  Render all row values into the specified `SafeHtmlBuilder`.

  Subclasses can optionally throw an `UnsupportedOperationException` if they prefer to render the rows in `AbstractHasData.replaceAllChildren(List, SafeHtml)` and `AbstractHasData.replaceChildren(List, int, SafeHtml)`. In this case, the `SafeHtml` argument will be null. Though a bit hacky, this is designed to supported legacy widgets that use `SafeHtmlBuilder`, and newer widgets that use other builders, such as the ElementBuilder API.

  Specified by:
    `renderRowValues` in class `AbstractHasData<T>`
  Parameters:
    `sb` - the `SafeHtmlBuilder` to render into
    `values` - the row values
    `start` - the absolute start index of the values
    `selectionModel` - the `SelectionModel`

### resetFocusOnCell

    protected boolean resetFocusOnCell()

  Description copied from class: `AbstractHasData`
  Reset focus on the currently focused cell.

  Specified by:
    `resetFocusOnCell` in class `AbstractHasData<T>`
  Returns:
    true if focus is taken, false if not

### setKeyboardSelected

    protected void setKeyboardSelected(int index,
                                       boolean selected,
                                       boolean stealFocus)

  Description copied from class: `AbstractHasData`
  Update an element to reflect its keyboard selected state.

  Specified by:
    `setKeyboardSelected` in class `AbstractHasData<T>`
  Parameters:
    `index` - the index of the element
    `selected` - true if selected, false if not
    `stealFocus` - true if the row should steal focus, false if not

### setSelected

    @Deprecated
    protected void setSelected(Element elem,
                                          boolean selected)

  Deprecated. this method is never called by AbstractHasData, render the selected styles in `renderRowValues(SafeHtmlBuilder, List, int, SelectionModel)`

  Description copied from class: `AbstractHasData`
  Update an element to reflect its selected state.

  Overrides:
    `setSelected` in class `AbstractHasData<T>`
  Parameters:
    `elem` - the element to update
    `selected` - true if selected, false if not

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