Grid (Vaadin Platform (vaadin-platform-javadoc) 14.10.5 API)

java.lang.Object
- com.vaadin.flow.component.Component
- - com.vaadin.flow.component.grid.Grid<T>

Type Parameters:: T - the grid bean type

All Implemented Interfaces:: AttachNotifier, BlurNotifier<Grid<T>>, DetachNotifier, Focusable<Grid<T>>, FocusNotifier<Grid<T>>, HasElement, HasEnabled, HasSize, HasStyle, HasTheme, HasDataProvider<T>, HasItems<T>, SortEvent.SortNotifier<Grid<T>,GridSortOrder<T>>, HasDataGenerators<T>, Serializable

Direct Known Subclasses:: CrudGrid, GridPro, TreeGrid

@Tag(value="vaadin-grid")
 @NpmPackage(value="@vaadin/vaadin-grid",
            version="5.9.7")
 @JsModule(value="@vaadin/vaadin-grid/src/vaadin-grid.js") @JsModule(value="@vaadin/vaadin-grid/src/vaadin-grid-column.js") @JsModule(value="@vaadin/vaadin-grid/src/vaadin-grid-sorter.js") @JsModule(value="@vaadin/vaadin-checkbox/src/vaadin-checkbox.js") @JsModule(value="./flow-component-renderer.js") @JsModule(value="./gridConnector-es6.js")
 @HtmlImport(value="frontend://bower_components/vaadin-grid/src/vaadin-grid.html") @HtmlImport(value="frontend://bower_components/vaadin-grid/src/vaadin-grid-column.html") @HtmlImport(value="frontend://bower_components/vaadin-grid/src/vaadin-grid-sorter.html") @HtmlImport(value="frontend://bower_components/vaadin-checkbox/src/vaadin-checkbox.html") @HtmlImport(value="frontend://flow-component-renderer.html")
 @JavaScript(value="frontend://gridConnector.js")
public class Grid<T>
extends Component
implements HasDataProvider<T>, HasStyle, HasSize, Focusable<Grid<T>>, SortEvent.SortNotifier<Grid<T>,GridSortOrder<T>>, HasTheme, HasDataGenerators<T>

Server-side component for the <vaadin-grid> element.

Author:: Vaadin Ltd
See Also:: Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`static class`	`Grid.AbstractGridExtension<T>` A helper base class for creating extensions for the Grid component.
`static class`	`Grid.Column<T>` Server-side component for the `<vaadin-grid-column>` element.
`protected static class`	`Grid.DataCommunicatorBuilder<T,U extends ArrayUpdater>` Builder for `DataCommunicator` object.
`static class`	`Grid.NestedNullBehavior` behavior when parsing nested properties which may contain `null` values in the property chain
`static class`	`Grid.SelectionMode` Selection mode representing the built-in selection models in grid.
`protected static class`	`Grid.UpdateQueue`

Nested classes/interfaces inherited from interface com.vaadin.flow.component.BlurNotifier
BlurNotifier.BlurEvent<C extends Component>

Nested classes/interfaces inherited from interface com.vaadin.flow.component.FocusNotifier
FocusNotifier.FocusEvent<C extends Component>

Constructor Summary

Constructors
Modifier	Constructor and Description
	`Grid()` Creates a new instance, with page size of 50.
	`Grid(Class<T> beanType)` Creates a new grid with an initial set of columns for each of the bean's properties.
	`Grid(Class<T> beanType, boolean autoCreateColumns)` Creates a new grid with an initial set of columns for each of the bean's properties.
`protected`	`Grid(Class<T> beanType, SerializableBiFunction<GridArrayUpdater.UpdateQueueData,Integer,Grid.UpdateQueue> updateQueueBuilder, B dataCommunicatorBuilder)` Creates a new grid with an initial set of columns for each of the bean's properties.
	`Grid(int pageSize)` Creates a new instance, with the specified page size.
`protected`	`Grid(int pageSize, SerializableBiFunction<GridArrayUpdater.UpdateQueueData,Integer,Grid.UpdateQueue> updateQueueBuilder, B dataCommunicatorBuilder)` Creates a new instance, with the specified page size and data communicator.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`Registration`	`addCellFocusListener(ComponentEventListener<CellFocusEvent<T>> listener)` Adds a listener to the grid that will be notified, when a cell has been focused.
`Grid.Column<T>`	`addColumn(Renderer<T> renderer)` Adds a new text column to this `Grid` with a renderer and default column factory.
`protected <C extends Grid.Column<T>> C`	`addColumn(Renderer<T> renderer, BiFunction<Renderer<T>,String,C> columnFactory)` Adds a new text column to this `Grid` with a renderer and column factory provided.
`protected <C extends Grid.Column<T>> C`	`addColumn(Renderer<T> renderer, BiFunction<Renderer<T>,String,C> columnFactory, String... sortingProperties)` Adds a new text column to this `Grid` with a template renderer, sorting properties and column factory provided.
`Grid.Column<T>`	`addColumn(Renderer<T> renderer, String... sortingProperties)` Adds a new text column to this `Grid` with a template renderer, sorting properties and default column factory.
`Grid.Column<T>`	`addColumn(String propertyName)` Adds a new column for the given property name with the default column factory.
`protected <C extends Grid.Column<T>> C`	`addColumn(String propertyName, BiFunction<Renderer<T>,String,C> columnFactory)` Adds a new column for the given property name with the column factory provided.
`Grid.Column<T>`	`addColumn(ValueProvider<T,?> valueProvider)` Adds a new text column to this `Grid` with a value provider and default column factory.
`protected <C extends Grid.Column<T>> C`	`addColumn(ValueProvider<T,?> valueProvider, BiFunction<Renderer<T>,String,C> columnFactory)` Adds a new text column to this `Grid` with a value provider and column factory provided.
`<V extends Comparable<? super V>> Grid.Column<T>`	`addColumn(ValueProvider<T,V> valueProvider, String... sortingProperties)` Adds a new text column to this `Grid` with a value provider and sorting properties.The value is converted to a JSON value by using `JsonSerializer.toJson(Object)`.
`Registration`	`addColumnReorderListener(ComponentEventListener<ColumnReorderEvent<T>> listener)` Adds a column reorder listener to this component.
`Registration`	`addColumnResizeListener(ComponentEventListener<ColumnResizeEvent<T>> listener)` Adds a column resize listener to this component.
`void`	`addColumns(String... propertyNames)` Adds a new columns for the given property names.
`<V extends Component> Grid.Column<T>`	`addComponentColumn(ValueProvider<T,V> componentProvider)` Adds a new column that shows components.
`GridContextMenu<T>`	`addContextMenu()` Adds a new context-menu for this grid.
`Registration`	`addDataGenerator(DataGenerator<T> dataGenerator)` Adds the given data generator.
`Registration`	`addDragEndListener(ComponentEventListener<GridDragEndEvent<T>> listener)` Adds a drag end listener to this component.
`Registration`	`addDragStartListener(ComponentEventListener<GridDragStartEvent<T>> listener)` Adds a drag start listener to this component.
`Registration`	`addDropListener(ComponentEventListener<GridDropEvent<T>> listener)` Adds a drop listener to this component.
`protected HeaderRow`	`addFirstHeaderRow()`
`Registration`	`addItemClickListener(ComponentEventListener<ItemClickEvent<T>> listener)` Adds an item click listener to this component.
`Registration`	`addItemDoubleClickListener(ComponentEventListener<ItemDoubleClickEvent<T>> listener)` Adds an item double click listener to this component.
`Registration`	`addSelectionListener(SelectionListener<Grid<T>,T> listener)` Adds a selection listener to the current selection model.
`Registration`	`addSortListener(ComponentEventListener<SortEvent<Grid<T>,GridSortOrder<T>>> listener)` Adds a sort order change listener that gets notified when the sort order changes.
`void`	`addThemeVariants(GridVariant... variants)` Adds theme variants to the component.
`Registration`	`addValueProvider(String property, ValueProvider<T,?> valueProvider)` Adds a ValueProvider to this Grid that is not tied to a Column.
`FooterRow`	`appendFooterRow()` Adds a new footer row to the bottom of the existing footer rows.
`HeaderRow`	`appendHeaderRow()` Adds a new header row to the bottom of the existing header rows.
`MultiSelect<Grid<T>,T>`	`asMultiSelect()` Use this grid as a multiselect in `Binder`.
`SingleSelect<Grid<T>,T>`	`asSingleSelect()` Use this grid as a single select in `Binder`.
`protected static int`	`compareMaybeComparables(Object a, Object b)`
`protected Grid.Column<T>`	`createColumn(Renderer<T> renderer, String columnId)` Deprecated. This method should not be used outside. `getDefaultColumnFactory()` should be used instead.
`protected String`	`createColumnId(boolean increment)`
`protected GridArrayUpdater`	`createDefaultArrayUpdater(SerializableBiFunction<GridArrayUpdater.UpdateQueueData,Integer,Grid.UpdateQueue> updateQueueFactory)`
`protected Editor<T>`	`createEditor()` Creates a new Editor instance.
`protected SerializableComparator<T>`	`createSortingComparator()` Creates a comparator for grid to sort rows.
`void`	`deselect(T item)` This method is a shorthand that delegates to the currently set selection model.
`void`	`deselectAll()` This method is a shorthand that delegates to the currently set selection model.
`protected GridArrayUpdater`	`getArrayUpdater()`
`Class<T>`	`getBeanType()` Returns the Class of bean this Grid is constructed with via `Grid(Class)`.
`SerializableFunction<T,String>`	`getClassNameGenerator()` Gets the function that is used for generating CSS class names for rows in this grid.
`Grid.Column<T>`	`getColumnByKey(String columnKey)` Gets a `Grid.Column` of this grid by its key.
`protected List<com.vaadin.flow.component.grid.ColumnLayer>`	`getColumnLayers()`
`List<Grid.Column<T>>`	`getColumns()` Gets an unmodifiable list of all `Grid.Column`s currently in this `Grid`.
`DataCommunicator<T>`	`getDataCommunicator()` Returns the data communicator of this Grid.
`DataProvider<T,?>`	`getDataProvider()` Returns the data provider of this grid.
`protected BiFunction<Renderer<T>,String,Grid.Column<T>>`	`getDefaultColumnFactory()` Gives a reference to the column factory.
`protected HeaderRow`	`getDefaultHeaderRow()`
`SerializablePredicate<T>`	`getDragFilter()` Gets the active drag filter.
`SerializablePredicate<T>`	`getDropFilter()` Gets the active drop filter.
`GridDropMode`	`getDropMode()` Gets the drop mode of this drop target.
`Editor<T>`	`getEditor()` Gets the editor.
`List<FooterRow>`	`getFooterRows()` Gets all of the footer rows in the Grid, in order from top to bottom.
`List<HeaderRow>`	`getHeaderRows()` Gets all of the header rows in the Grid, in order from top to bottom.
`Grid.NestedNullBehavior`	`getNestedNullBehavior()` Get the behavior when facing nested `null` values.
`int`	`getPageSize()` Gets the current page size, which is the number of items fetched at a time from the dataprovider.
`PropertySet<T>`	`getPropertySet()` Returns `PropertySet` of bean this Grid is constructed with via `Grid(Class)`.
`Set<T>`	`getSelectedItems()` This method is a shorthand that delegates to the currently set selection model.
`GridSelectionModel<T>`	`getSelectionModel()` Returns the selection model for this grid.
`List<GridSortOrder<T>>`	`getSortOrder()` Gets an list of the current sort orders in the Grid.
`protected String`	`getUniqueKeyProperty()` Gets property name for unique key in row's generated JSON.
`protected ValueProvider<T,String>`	`getUniqueKeyProvider()` Gets optional value provider for unique key in row's generated JSON.
`protected void`	`initConnector()`
`protected com.vaadin.flow.component.grid.ColumnLayer`	`insertColumnLayer(int index, List<com.vaadin.flow.component.grid.AbstractColumn<?>> columns)` Creates a new layer from the provided columns, inserts the layer into given index and returns the new layer.
`boolean`	`isAllRowsVisible()` Gets whether grid's height is defined by the number of its rows.
`boolean`	`isColumnReorderingAllowed()` Returns whether column reordering is allowed.
`boolean`	`isDetailsVisible(T item)` Returns the visibility of details component for given item.
`boolean`	`isDetailsVisibleOnClick()` Gets whether the item details are opened and closed by clicking the rows or not.
`boolean`	`isHeightByRows()` Deprecated. since 14.7 - use `isAllRowsVisible()`
`boolean`	`isMultiSort()` Gets whether multiple column sorting is enabled on the client-side.
`boolean`	`isRowsDraggable()` Gets whether rows of the grid can be dragged.
`boolean`	`isVerticalScrollingEnabled()` Gets whether the vertical scrolling on the Grid web component is enabled.
`protected void`	`onAttach(AttachEvent attachEvent)` Called when the component is attached to a UI.
`protected void`	`onDataProviderChange()` Callback which is called if a new data provider is set or any change happen in the current data provider (an `DataChangeEvent` event is fired).
`protected void`	`onDetach(DetachEvent detachEvent)` Called when the component is detached from a UI.
`void`	`onEnabledStateChanged(boolean enabled)` Handle component enable state when the enabled state changes.
`FooterRow`	`prependFooterRow()` Adds a new footer row on the top of the existing footer rows.
`HeaderRow`	`prependHeaderRow()` Adds a new header row on the top of the existing header rows.
`void`	`recalculateColumnWidths()` Updates the `width` of all columns which have `autoWidth` set to `true`.
`void`	`removeAllColumns()` Removes all columns from this Grid.
`void`	`removeColumn(Grid.Column<T> column)` Removes a column from the Grid.
`void`	`removeColumnByKey(String columnKey)` Removes a column with the given column key from the Grid.
`protected void`	`removeColumnLayer(com.vaadin.flow.component.grid.ColumnLayer layer)` Removes the given layer and moves the columns on the lower level to its place.
`void`	`removeColumns(Grid.Column<T>... columns)` Removes columns from the Grid.
`void`	`removeDataGenerator(DataGenerator<T> dataGenerator)` Removes the given data generator.
`void`	`removeThemeVariants(GridVariant... variants)` Removes theme variants from the component.
`void`	`scrollToEnd()` Scrolls to the last data row of the grid.
`void`	`scrollToIndex(int rowIndex)` Scrolls to the given row index.
`void`	`scrollToStart()` Scrolls to the beginning of the first data row.
`void`	`select(T item)` This method is a shorthand that delegates to the currently set selection model.
`void`	`setAllRowsVisible(boolean allRowsVisible)` If `true`, the grid's height is defined by its rows.
`void`	`setClassNameGenerator(SerializableFunction<T,String> classNameGenerator)` Sets the function that is used for generating CSS class names for rows in this grid.
`protected void`	`setColumnKey(String key, Grid.Column column)` Sets a user-defined identifier for given column.
`void`	`setColumnOrder(Grid.Column<T>... columns)` Sets a new column order for the grid.
`void`	`setColumnOrder(List<Grid.Column<T>> columns)` Sets a new column order for the grid.
`void`	`setColumnReorderingAllowed(boolean columnReorderingAllowed)` Sets whether or not column reordering is allowed.
`void`	`setColumns(String... propertyNames)` Sets the columns and their order based on the given properties.
`void`	`setDataProvider(DataProvider<T,?> dataProvider)` Sets the data provider for this listing.
`void`	`setDetailsVisible(T item, boolean visible)` Sets the visibility of details component for given item.
`void`	`setDetailsVisibleOnClick(boolean detailsVisibleOnClick)` Sets whether the item details can be opened and closed by clicking the rows or not.
`void`	`setDragDataGenerator(String type, SerializableFunction<T,String> dragDataGenerator)` Sets a generator function for customizing drag data.
`void`	`setDragFilter(SerializablePredicate<T> dragFilter)` Sets the drag filter for this drag source.
`void`	`setDropFilter(SerializablePredicate<T> dropFilter)` Sets the drop filter for this drag target.
`void`	`setDropMode(GridDropMode dropMode)` Sets the drop mode of this drop target.
`void`	`setHeightByRows(boolean heightByRows)` Deprecated. since 14.7 - use `setAllRowsVisible(boolean)`
`void`	`setItemDetailsRenderer(Renderer<T> renderer)` Set the renderer to use for displaying the item details rows in this grid.
`void`	`setMultiSort(boolean multiSort)` Sets whether multiple column sorting is enabled on the client-side.
`void`	`setNestedNullBehavior(Grid.NestedNullBehavior nestedNullBehavior)` Set the behavior when facing nested `null` values.
`void`	`setPageSize(int pageSize)` Sets the page size, which is the number of items fetched at a time from the dataprovider.
`void`	`setRowsDraggable(boolean rowsDraggable)` Sets whether the user can drag the grid rows or not.
`void`	`setSelectionDragDetails(int draggedItemsCount, Map<String,String> dragData)` Sets explicit drag operation details for when the user is dragging the selected items.
`GridSelectionModel<T>`	`setSelectionMode(Grid.SelectionMode selectionMode)` Sets the grid's selection mode.
`protected void`	`setSelectionModel(GridSelectionModel<T> model, Grid.SelectionMode selectionMode)` Sets the selection model for the grid.
`void`	`setSortableColumns(String... propertyNames)` Sets the defined columns as sortable, based on the given property names.
`protected void`	`setUniqueKeyProperty(String uniqueKeyProperty)` Sets property name for unique key in row's generated JSON.
`protected void`	`setUniqueKeyProvider(ValueProvider<T,String> uniqueKeyProvider)` Sets value provider for unique key in row's generated JSON.
`void`	`setVerticalScrollingEnabled(boolean enabled)` Enables or disables the vertical scrolling on the Grid web component.
`void`	`sort(List<GridSortOrder<T>> order)` Forces a defined sort order for the columns in the Grid.
`protected void`	`updateSelectionModeOnClient()`

Methods inherited from class com.vaadin.flow.component.Component
addListener, fireEvent, from, get, getChildren, getElement, getEventBus, getId, getLocale, getParent, getTranslation, getTranslation, getTranslation, getTranslation, getUI, hasListener, isAttached, isTemplateMapped, isVisible, set, setElement, setId, setVisible

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

Methods inherited from interface com.vaadin.flow.data.binder.HasDataProvider
setItems

Methods inherited from interface com.vaadin.flow.data.binder.HasItems
setItems, setItems

Methods inherited from interface com.vaadin.flow.component.HasStyle
addClassName, addClassNames, getClassName, getClassNames, getStyle, hasClassName, removeClassName, removeClassNames, setClassName, setClassName

Methods inherited from interface com.vaadin.flow.component.HasSize
getCssSize, getHeight, getHeightUnit, getMaxHeight, getMaxWidth, getMinHeight, getMinWidth, getWidth, getWidthUnit, setHeight, setHeight, setHeightFull, setMaxHeight, setMaxHeight, setMaxWidth, setMaxWidth, setMinHeight, setMinHeight, setMinWidth, setMinWidth, setSizeFull, setSizeUndefined, setWidth, setWidth, setWidthFull

Methods inherited from interface com.vaadin.flow.component.Focusable
addFocusShortcut, blur, focus, getTabIndex, setTabIndex

Methods inherited from interface com.vaadin.flow.component.BlurNotifier
addBlurListener

Methods inherited from interface com.vaadin.flow.component.FocusNotifier
addFocusListener

Methods inherited from interface com.vaadin.flow.component.HasEnabled
isEnabled, setEnabled

Methods inherited from interface com.vaadin.flow.component.HasElement
getElement

Methods inherited from interface com.vaadin.flow.component.HasTheme
addThemeName, addThemeNames, getThemeName, getThemeNames, hasThemeName, removeThemeName, removeThemeNames, setThemeName, setThemeName

Methods inherited from interface com.vaadin.flow.component.AttachNotifier
addAttachListener

Methods inherited from interface com.vaadin.flow.component.DetachNotifier
addDetachListener

- Constructor Detail
  - Grid
```
public Grid()
```
    Creates a new instance, with page size of 50.
  - Grid
```
public Grid(int pageSize)
```
    Creates a new instance, with the specified page size.
    The page size influences the Query.getLimit() sent by the client, but it's up to the webcomponent to determine the actual query limit, based on the height of the component and scroll position. Usually the limit is 3 times the page size (e.g. 150 items with a page size of 50).
    
    Parameters:
    
    pageSize - the page size. Must be greater than zero.
  - Grid
```
public Grid(Class<T> beanType,
            boolean autoCreateColumns)
```
    Creates a new grid with an initial set of columns for each of the bean's properties. The property-values of the bean will be converted to Strings. Full names of the properties will be used as the column keys and the property captions will be used as the column headers. The generated columns will be sortable by default, if the property is Comparable.
    When autoCreateColumns is true, only the direct properties of the bean are included and they will be in alphabetical order. Use setColumns(String...) to define which properties to include and in which order. You can also add a column for an individual property with addColumn(String). Both of these methods support also sub-properties with dot-notation, eg. "property.nestedProperty".
    
    Parameters:
    
    beanType - the bean type to use, not null
    
    autoCreateColumns - when true, columns are created automatically for the properties of the beanType
  - Grid
```
public Grid(Class<T> beanType)
```
    Creates a new grid with an initial set of columns for each of the bean's properties. The property-values of the bean will be converted to Strings. Full names of the properties will be used as the column keys and the property captions will be used as the column headers. The generated columns will be sortable by default, if the property is Comparable.
    By default, only the direct properties of the bean are included and they will be in alphabetical order. Use setColumns(String...) to define which properties to include and in which order. You can also add a column for an individual property with addColumn(String). Both of these methods support also sub-properties with dot-notation, eg. "property.nestedProperty".
    
    Parameters:
    
    beanType - the bean type to use, not null
  - Grid
```
protected Grid(Class<T> beanType,
               SerializableBiFunction<GridArrayUpdater.UpdateQueueData,Integer,Grid.UpdateQueue> updateQueueBuilder,
               B dataCommunicatorBuilder)
```
    Creates a new grid with an initial set of columns for each of the bean's properties. The property-values of the bean will be converted to Strings. Full names of the properties will be used as the column keys and the property captions will be used as the column headers.
    You can add columns for nested properties of the bean with addColumn(String).
    
    Type Parameters:
    
    B - the data communicator builder type
    
    U - the GridArrayUpdater type
    
    Parameters:
    
    beanType - the bean type to use, not null
    
    updateQueueBuilder - the builder for new Grid.UpdateQueue instance
    
    dataCommunicatorBuilder - Builder for DataCommunicator implementation this Grid uses to handle all data communication.
  - Grid
```
protected Grid(int pageSize,
               SerializableBiFunction<GridArrayUpdater.UpdateQueueData,Integer,Grid.UpdateQueue> updateQueueBuilder,
               B dataCommunicatorBuilder)
```
    Creates a new instance, with the specified page size and data communicator.
    The page size influences the Query.getLimit() sent by the client, but it's up to the webcomponent to determine the actual query limit, based on the height of the component and scroll position. Usually the limit is 3 times the page size (e.g. 150 items with a page size of 50).
    
    Type Parameters:
    
    B - the data communicator builder type
    
    U - the GridArrayUpdater type
    
    Parameters:
    
    pageSize - the page size. Must be greater than zero.
    
    updateQueueBuilder - the builder for new Grid.UpdateQueue instance
    
    dataCommunicatorBuilder - Builder for DataCommunicator implementation this Grid uses to handle all data communication.
- Method Detail
  - initConnector
```
protected void initConnector()
```
  - createDefaultArrayUpdater
```
protected GridArrayUpdater createDefaultArrayUpdater(SerializableBiFunction<GridArrayUpdater.UpdateQueueData,Integer,Grid.UpdateQueue> updateQueueFactory)
```
  - addColumn
```
public Grid.Column<T> addColumn(ValueProvider<T,?> valueProvider)
```
    Adds a new text column to this Grid with a value provider and default column factory. The value is converted to String when sent to the client by using String.valueOf(Object).
    NOTE: For displaying components, see addComponentColumn(ValueProvider). For using build-in renderers, see addColumn(Renderer).
    
    Every added column sends data to the client side regardless of its visibility state. Don't add a new column at all or use removeColumn(Column) to avoid sending extra data.
    
    NOTE: This method is a shorthand for addColumn(ValueProvider, BiFunction)
    
    Parameters:
    
    valueProvider - the value provider
    
    Returns:
    
    the created column
    
    See Also:
    
    addComponentColumn(ValueProvider), addColumn(Renderer), removeColumn(Column), getDefaultColumnFactory(), addColumn(ValueProvider, BiFunction)
  - addColumn
```
protected <C extends Grid.Column<T>> C addColumn(ValueProvider<T,?> valueProvider,
                                                 BiFunction<Renderer<T>,String,C> columnFactory)
```
    Adds a new text column to this Grid with a value provider and column factory provided. The value is converted to String when sent to the client by using String.valueOf(Object).
    NOTE: For displaying components, see addComponentColumn(ValueProvider). For using build-in renderers, see addColumn(Renderer).
    
    Every added column sends data to the client side regardless of its visibility state. Don't add a new column at all or use removeColumn(Column) to avoid sending extra data.
    
    Parameters:
    
    valueProvider - the value provider
    
    columnFactory - the method that creates a new column instance for this Grid instance.
    
    Returns:
    
    the created column
    
    See Also:
    
    addColumn(ValueProvider), addComponentColumn(ValueProvider), addColumn(Renderer), removeColumn(Column)
  - addComponentColumn
```
public <V extends Component> Grid.Column<T> addComponentColumn(ValueProvider<T,V> componentProvider)
```
    Adds a new column that shows components.
    This is a shorthand for addColumn(Renderer) with a ComponentRenderer.
    NOTE: Using ComponentRenderer is not as efficient as the built in renderers or using TemplateRenderer.
    
    Every added column sends data to the client side regardless of its visibility state. Don't add a new column at all or use removeColumn(Column) to avoid sending extra data.
    
    Type Parameters:
    
    V - the component type
    
    Parameters:
    
    componentProvider - a value provider that will return a component for the given item
    
    Returns:
    
    the new column
    
    See Also:
    
    addColumn(Renderer), removeColumn(Column)
  - addColumn
```
public <V extends Comparable<? super V>> Grid.Column<T> addColumn(ValueProvider<T,V> valueProvider,
                                                                  String... sortingProperties)
```
    Adds a new text column to this Grid with a value provider and sorting properties.The value is converted to a JSON value by using JsonSerializer.toJson(Object). The sorting properties are used to configure backend sorting for this column. In-memory sorting is automatically configured using the return type of the given ValueProvider.
    Every added column sends data to the client side regardless of its visibility state. Don't add a new column at all or use removeColumn(Column) to avoid sending extra data.
    
    Type Parameters:
    
    V - the type of the column
    
    Parameters:
    
    valueProvider - the value provider
    
    sortingProperties - the sorting properties to use with this column
    
    Returns:
    
    the created column
    
    See Also:
    
    Grid.Column.setComparator(ValueProvider), Grid.Column.setSortProperty(String...), removeColumn(Column)
  - addColumn
```
public Grid.Column<T> addColumn(Renderer<T> renderer)
```
    Adds a new text column to this Grid with a renderer and default column factory.
    See implementations of the Renderer interface for built-in renderer options with type safe APIs. For a renderer using template binding, use TemplateRenderer.of(String).
    NOTE: You can add component columns easily using the addComponentColumn(ValueProvider), but using ComponentRenderer is not as efficient as the built in renderers or using TemplateRenderer.
    
    Every added column sends data to the client side regardless of its visibility state. Don't add a new column at all or use removeColumn(Column) to avoid sending extra data.
    
    NOTE: This method is a shorthand for addColumn(Renderer, BiFunction)
    
    Parameters:
    
    renderer - the renderer used to create the grid cell structure
    
    Returns:
    
    the created column
    
    See Also:
    
    getDefaultColumnFactory(), TemplateRenderer.of(String), addComponentColumn(ValueProvider), removeColumn(Column), addColumn(Renderer, BiFunction)
  - addColumn
```
protected <C extends Grid.Column<T>> C addColumn(Renderer<T> renderer,
                                                 BiFunction<Renderer<T>,String,C> columnFactory)
```
    Adds a new text column to this Grid with a renderer and column factory provided.
    See implementations of the Renderer interface for built-in renderer options with type safe APIs. For a renderer using template binding, use TemplateRenderer.of(String).
    NOTE: You can add component columns easily using the addComponentColumn(ValueProvider), but using ComponentRenderer is not as efficient as the built in renderers or using TemplateRenderer.
    
    Every added column sends data to the client side regardless of its visibility state. Don't add a new column at all or use removeColumn(Column) to avoid sending extra data.
    
    Parameters:
    
    renderer - the renderer used to create the grid cell structure
    
    columnFactory - the method that creates a new column instance for this Grid instance.
    
    Returns:
    
    the created column
    
    See Also:
    
    addColumn(Renderer), TemplateRenderer.of(String), addComponentColumn(ValueProvider), removeColumn(Column)
  - createColumn
```
@Deprecated
protected Grid.Column<T> createColumn(Renderer<T> renderer,
                                                  String columnId)
```
    Deprecated. This method should not be used outside. getDefaultColumnFactory() should be used instead.
    
    Creates a new column instance for this Grid instance.
    This method must not return null.
    
    Parameters:
    
    renderer - the renderer used to create the grid cell structure
    
    columnId - internal column id
    
    Returns:
    
    column instance
    
    See Also:
    
    createColumnId(boolean), Renderer
  - getDefaultColumnFactory
```
protected BiFunction<Renderer<T>,String,Grid.Column<T>> getDefaultColumnFactory()
```
    Gives a reference to the column factory.
    This method must not return null.
    
    Returns:
    
    method for column creation
  - addColumn
```
public Grid.Column<T> addColumn(Renderer<T> renderer,
                                String... sortingProperties)
```
    Adds a new text column to this Grid with a template renderer, sorting properties and default column factory. The values inside the renderer are converted to JSON values by using JsonSerializer.toJson(Object).
    NOTE: You can add component columns easily using the addComponentColumn(ValueProvider), but using ComponentRenderer is not as efficient as the built in renderers or using TemplateRenderer.
    This constructor attempts to automatically configure both in-memory and backend sorting using the given sorting properties and matching those with the property names used in the given renderer.
    Note: if a property of the renderer that is used as a sorting property does not extend Comparable, no in-memory sorting is configured for it.
    Every added column sends data to the client side regardless of its visibility state. Don't add a new column at all or use removeColumn(Column) to avoid sending extra data.
    
    Note: This method is a shorthand for ##addColumn(Renderer, BiFunction, String...)
    
    Parameters:
    
    renderer - the renderer used to create the grid cell structure
    
    sortingProperties - the sorting properties to use for this column
    
    Returns:
    
    the created column
    
    See Also:
    
    getDefaultColumnFactory(), addColumn(Renderer, BiFunction, String...), removeColumn(Column)
  - addColumn
```
protected <C extends Grid.Column<T>> C addColumn(Renderer<T> renderer,
                                                 BiFunction<Renderer<T>,String,C> columnFactory,
                                                 String... sortingProperties)
```
    Adds a new text column to this Grid with a template renderer, sorting properties and column factory provided. The values inside the renderer are converted to JSON values by using JsonSerializer.toJson(Object).
    NOTE: You can add component columns easily using the addComponentColumn(ValueProvider), but using ComponentRenderer is not as efficient as the built in renderers or using TemplateRenderer.
    This constructor attempts to automatically configure both in-memory and backend sorting using the given sorting properties and matching those with the property names used in the given renderer.
    Note: if a property of the renderer that is used as a sorting property does not extend Comparable, no in-memory sorting is configured for it.
    Every added column sends data to the client side regardless of its visibility state. Don't add a new column at all or use removeColumn(Column) to avoid sending extra data.
    
    Parameters:
    
    renderer - the renderer used to create the grid cell structure
    
    columnFactory - the method that creates a new column instance for this Grid instance.
    
    sortingProperties - the sorting properties to use for this column
    
    Returns:
    
    the created column
    
    See Also:
    
    addColumn(Renderer, String...), removeColumn(Column)
  - addColumn
```
public Grid.Column<T> addColumn(String propertyName)
```
    Adds a new column for the given property name with the default column factory. The property values are converted to Strings in the grid cells. The property's full name will be used as the column key and the property caption will be used as the column header.
    You can add columns for nested properties with dot notation, eg. "property.nestedProperty"
    If the property is Comparable, the created column is sortable by default. This can be changed with the Grid.Column.setSortable(boolean) method.
    Note: This method can only be used for a Grid created from a bean type with Grid(Class).
    Every added column sends data to the client side regardless of its visibility state. Don't add a new column at all or use removeColumn(Column) to avoid sending extra data.
    
    Note: This method is a shorthand for addColumn(String, BiFunction)
    
    Parameters:
    
    propertyName - the property name of the new column, not null
    
    Returns:
    
    the created column
    
    See Also:
    
    getDefaultColumnFactory(), addColumn(String, BiFunction), removeColumn(Column)
  - addColumn
```
protected <C extends Grid.Column<T>> C addColumn(String propertyName,
                                                 BiFunction<Renderer<T>,String,C> columnFactory)
```
    Adds a new column for the given property name with the column factory provided. The property values are converted to Strings in the grid cells. The property's full name will be used as the column key and the property caption will be used as the column header.
    You can add columns for nested properties with dot notation, eg. "property.nestedProperty"
    If the property is Comparable, the created column is sortable by default. This can be changed with the Grid.Column.setSortable(boolean) method.
    Note: This method can only be used for a Grid created from a bean type with Grid(Class).
    Every added column sends data to the client side regardless of its visibility state. Don't add a new column at all or use removeColumn(Column) to avoid sending extra data.
    
    Parameters:
    
    propertyName - the property name of the new column, not null
    
    columnFactory - the method that creates a new column instance for this Grid instance.
    
    Returns:
    
    the created column
    
    See Also:
    
    addColumn(String), removeColumn(Column)
  - addColumns
```
public void addColumns(String... propertyNames)
```
    Adds a new columns for the given property names. The property values are converted to Strings in the grid cells. The properties' full names will be used as the column key and the properties' caption will be used as the column header.
    You can add columns for nested properties with dot notation, eg. "property.nestedProperty"
    If the property is Comparable, the created column is sortable by default. This can be changed with the Grid.Column.setSortable(boolean) method.
    Note: This method can only be used for a Grid created from a bean type with Grid(Class).
    Every added column sends data to the client side regardless of its visibility state. Don't add a new column at all or use removeColumn(Column) to avoid sending extra data.
    
    Parameters:
    
    propertyNames - the property names of the new columns, not null
    
    See Also:
    
    addColumn(String), removeColumn(Column)
  - setColumns
```
public void setColumns(String... propertyNames)
```
    Sets the columns and their order based on the given properties.
    This is a shortcut for removing all columns and then calling addColumn(String) for each of the given propertyNames.
    You can add columns for nested properties with dot notation, eg. "property.nestedProperty"
    Note that this also resets the headers and footers.
    Note: This method can only be used for a Grid created from a bean type with Grid(Class).
    
    Parameters:
    
    propertyNames - the properties to create columns for
  - setSortableColumns
```
public void setSortableColumns(String... propertyNames)
```
    Sets the defined columns as sortable, based on the given property names.
    This is a shortcut for setting all columns not sortable and then calling Grid.Column.setSortable(boolean) for each of the columns defined by the given propertyNames.
    You can set sortable columns for nested properties with dot notation, eg. "property.nestedProperty"
    Note: This method can only be used for a Grid created from a bean type with Grid(Class).
    
    Parameters:
    
    propertyNames - the property names used to reference the columns
    
    Throws:
    
    IllegalArgumentException - if any of the propertyNames refers to a non-existing column
    
    See Also:
    
    setColumns(String...), getColumnByKey(String)
  - setColumnKey
```
protected void setColumnKey(String key,
                            Grid.Column column)
```
    Sets a user-defined identifier for given column.
    
    Parameters:
    
    column - the column
    
    key - the user-defined identifier
    
    See Also:
    
    Grid.Column.setKey(String)
  - createColumnId
```
protected String createColumnId(boolean increment)
```
  - prependHeaderRow
```
public HeaderRow prependHeaderRow()
```
    Adds a new header row on the top of the existing header rows.
    If there are no existing header rows, this will create the first row.
    
    Returns:
    
    the created header row
  - appendHeaderRow
```
public HeaderRow appendHeaderRow()
```
    Adds a new header row to the bottom of the existing header rows.
    If there are no existing header rows, this will create the first row.
    
    Returns:
    
    the created header row
  - addFirstHeaderRow
```
protected HeaderRow addFirstHeaderRow()
```
  - getDefaultHeaderRow
```
protected HeaderRow getDefaultHeaderRow()
```
  - prependFooterRow
```
public FooterRow prependFooterRow()
```
    Adds a new footer row on the top of the existing footer rows.
    If there are no existing footer rows, this will create the first row.
    
    Returns:
    
    the created footer row
  - appendFooterRow
```
public FooterRow appendFooterRow()
```
    Adds a new footer row to the bottom of the existing footer rows.
    If there are no existing footer rows, this will create the first row.
    
    Returns:
    
    the created header row
  - getColumnLayers
```
protected List<com.vaadin.flow.component.grid.ColumnLayer> getColumnLayers()
```
  - getHeaderRows
```
public List<HeaderRow> getHeaderRows()
```
    Gets all of the header rows in the Grid, in order from top to bottom.
    
    Returns:
    
    the header rows of the Grid
  - getFooterRows
```
public List<FooterRow> getFooterRows()
```
    Gets all of the footer rows in the Grid, in order from top to bottom.
    
    Returns:
    
    the footer rows of the Grid
  - addThemeVariants
```
public void addThemeVariants(GridVariant... variants)
```
    Adds theme variants to the component.
    
    Parameters:
    
    variants - theme variants to add
  - removeThemeVariants
```
public void removeThemeVariants(GridVariant... variants)
```
    Removes theme variants from the component.
    
    Parameters:
    
    variants - theme variants to remove
  - insertColumnLayer
```
protected com.vaadin.flow.component.grid.ColumnLayer insertColumnLayer(int index,
                                                                       List<com.vaadin.flow.component.grid.AbstractColumn<?>> columns)
```
    Creates a new layer from the provided columns, inserts the layer into given index and returns the new layer.
    The user of this method should make sure that the DOM corresponds the column layer structure.
    
    Parameters:
    
    index - the index to insert
    
    columns - the column components that the new layer will wrap
    
    Returns:
    
    the new layer
  - removeColumnLayer
```
protected void removeColumnLayer(com.vaadin.flow.component.grid.ColumnLayer layer)
```
    Removes the given layer and moves the columns on the lower level to its place.
    
    Parameters:
    
    layer - the layer to remove, not the bottom layer
  - setDataProvider
```
public void setDataProvider(DataProvider<T,?> dataProvider)
```
    Description copied from interface: HasDataProvider
    
    Sets the data provider for this listing. The data provider is queried for displayed items as needed.
    
    Specified by:
    
    setDataProvider in interface HasDataProvider<T>
    
    Parameters:
    
    dataProvider - the data provider, not null
  - getDataProvider
```
public DataProvider<T,?> getDataProvider()
```
    Returns the data provider of this grid.
    
    Returns:
    
    the data provider of this grid, not null
  - getDataCommunicator
```
public DataCommunicator<T> getDataCommunicator()
```
    Returns the data communicator of this Grid.
    
    Returns:
    
    the data communicator, not null
  - getPageSize
```
public int getPageSize()
```
    Gets the current page size, which is the number of items fetched at a time from the dataprovider.
    
    Returns:
    
    the current page size
  - setPageSize
```
public void setPageSize(int pageSize)
```
    Sets the page size, which is the number of items fetched at a time from the dataprovider.
    Note: the number of items in the server-side memory can be considerably higher than the page size, since the component can show more than one page at a time.
    Setting the pageSize after the Grid has been rendered effectively resets the component, and the current page(s) and sent over again.
    
    Parameters:
    
    pageSize - the maximum number of items sent per request. Should be greater than zero
  - getSelectionModel
```
public GridSelectionModel<T> getSelectionModel()
```
    Returns the selection model for this grid.
    
    Returns:
    
    the selection model, not null
  - setSelectionModel
```
protected void setSelectionModel(GridSelectionModel<T> model,
                                 Grid.SelectionMode selectionMode)
```
    Sets the selection model for the grid.
    This method is for setting a custom selection model, and is protected because setSelectionMode(SelectionMode) should be used for easy switching between built-in selection models.
    The default selection model is GridSingleSelectionModel.
    To use a custom selection model, you can e.g. extend the grid call this method with your custom selection model.
    
    Parameters:
    
    model - the selection model to use, not null
    
    selectionMode - the selection mode this selection model corresponds to, not null
    
    See Also:
    
    setSelectionMode(SelectionMode)
  - updateSelectionModeOnClient
```
protected void updateSelectionModeOnClient()
```
  - setSelectionMode
```
public GridSelectionModel<T> setSelectionMode(Grid.SelectionMode selectionMode)
```
    Sets the grid's selection mode.
    To use your custom selection model, you can use setSelectionModel(GridSelectionModel, SelectionMode), see existing selection model implementations for example.
    
    Parameters:
    
    selectionMode - the selection mode to switch to, not null
    
    Returns:
    
    the used selection model
    
    See Also:
    
    Grid.SelectionMode, GridSelectionModel, setSelectionModel(GridSelectionModel, SelectionMode)
  - asSingleSelect
```
public SingleSelect<Grid<T>,T> asSingleSelect()
```
    Use this grid as a single select in Binder.
    Throws IllegalStateException if the grid is not using a GridSingleSelectionModel.
    
    Returns:
    
    the single select wrapper that can be used in binder
    
    Throws:
    
    IllegalStateException - if not using a single selection model
  - asMultiSelect
```
public MultiSelect<Grid<T>,T> asMultiSelect()
```
    Use this grid as a multiselect in Binder.
    Throws IllegalStateException if the grid is not using a GridMultiSelectionModel.
    
    Returns:
    
    the multiselect wrapper that can be used in binder
    
    Throws:
    
    IllegalStateException - if not using a multiselection model
  - getSelectedItems
```
public Set<T> getSelectedItems()
```
    This method is a shorthand that delegates to the currently set selection model.
    
    Returns:
    
    a set with the selected items, never null
    
    See Also:
    
    getSelectionModel(), GridSelectionModel
  - select
```
public void select(T item)
```
    This method is a shorthand that delegates to the currently set selection model.
    
    Parameters:
    
    item - the item to select
    
    See Also:
    
    getSelectionModel(), GridSelectionModel
  - deselect
```
public void deselect(T item)
```
    This method is a shorthand that delegates to the currently set selection model.
    
    Parameters:
    
    item - the item to deselect
    
    See Also:
    
    getSelectionModel(), GridSelectionModel
  - deselectAll
```
public void deselectAll()
```
    This method is a shorthand that delegates to the currently set selection model.
    
    See Also:
    
    getSelectionModel(), GridSelectionModel
  - addSelectionListener
```
public Registration addSelectionListener(SelectionListener<Grid<T>,T> listener)
```
    Adds a selection listener to the current selection model.
    This is a shorthand for grid.getSelectionModel().addSelectionListener(). To get more detailed selection events, use getSelectionModel() and either GridSingleSelectionModel.addSingleSelectionListener(SingleSelectionListener) or GridMultiSelectionModel.addMultiSelectionListener(MultiSelectionListener) depending on the used selection mode.
    
    Parameters:
    
    listener - the listener to add
    
    Returns:
    
    a registration handle to remove the listener
    
    Throws:
    
    UnsupportedOperationException - if selection has been disabled with Grid.SelectionMode.NONE
  - setItemDetailsRenderer
```
public void setItemDetailsRenderer(Renderer<T> renderer)
```
    Set the renderer to use for displaying the item details rows in this grid.
    
    Parameters:
    
    renderer - the renderer to use for displaying item details rows, null to remove the current renderer
  - isColumnReorderingAllowed
```
@Synchronize(value="column-reordering-allowed-changed")
public boolean isColumnReorderingAllowed()
```
    Returns whether column reordering is allowed. Default value is false.
    
    Returns:
    
    true if reordering is allowed
  - setColumnReorderingAllowed
```
public void setColumnReorderingAllowed(boolean columnReorderingAllowed)
```
    Sets whether or not column reordering is allowed. Default value is false.
    
    Parameters:
    
    columnReorderingAllowed - specifies whether column reordering is allowed
  - getColumns
```
public List<Grid.Column<T>> getColumns()
```
    Gets an unmodifiable list of all Grid.Columns currently in this Grid.
    Note: If column reordering is enabled with setColumnReorderingAllowed(boolean) and the user has reordered the columns, the order of the list returned by this method might not be correct.
    
    Returns:
    
    unmodifiable list of columns
  - getColumnByKey
```
public Grid.Column<T> getColumnByKey(String columnKey)
```
    Gets a Grid.Column of this grid by its key.
    
    Parameters:
    
    columnKey - the identifier key of the column to get
    
    Returns:
    
    the column corresponding to the given column key, or null if no column has such key
    
    See Also:
    
    Grid.Column.setKey(String)
  - removeColumnByKey
```
public void removeColumnByKey(String columnKey)
```
    Removes a column with the given column key from the Grid.
    
    Parameters:
    
    columnKey - the key of the column, assigned by Grid.Column.setKey(String), or automatically created when using Grid(Class). Cannot be null
    
    Throws:
    
    IllegalArgumentException - if the column is not part of this Grid
  - removeColumn
```
public void removeColumn(Grid.Column<T> column)
```
    Removes a column from the Grid.
    
    Parameters:
    
    column - the column to be removed, not null
    
    Throws:
    
    NullPointerException - if the column is null
    
    IllegalArgumentException - if the column is not owned by this Grid
  - removeColumns
```
public void removeColumns(Grid.Column<T>... columns)
```
    Removes columns from the Grid. Does nothing if the array is empty.
    
    Parameters:
    
    columns - the columns to be removed, not null
    
    Throws:
    
    NullPointerException - if the column is null
    
    IllegalArgumentException - if the column is not owned by this Grid
  - removeAllColumns
```
public void removeAllColumns()
```
    Removes all columns from this Grid.
  - setDetailsVisible
```
public void setDetailsVisible(T item,
                              boolean visible)
```
    Sets the visibility of details component for given item.
    
    Parameters:
    
    item - the item to show details for
    
    visible - true if details component should be visible; false if it should be hidden
  - setDetailsVisibleOnClick
```
public void setDetailsVisibleOnClick(boolean detailsVisibleOnClick)
```
    Sets whether the item details can be opened and closed by clicking the rows or not.
    
    Parameters:
    
    detailsVisibleOnClick - true to enable opening and closing item details by clicking the rows, false to disable this functionality
    
    See Also:
    
    setItemDetailsRenderer(Renderer)
  - isDetailsVisibleOnClick
```
public boolean isDetailsVisibleOnClick()
```
    Gets whether the item details are opened and closed by clicking the rows or not.
    
    Returns:
    
    true if clicking the rows opens and closes their item details, false otherwise
    
    See Also:
    
    setItemDetailsRenderer(Renderer)
  - isDetailsVisible
```
public boolean isDetailsVisible(T item)
```
    Returns the visibility of details component for given item.
    
    Parameters:
    
    item - the item to show details for
    
    Returns:
    
    true if details component should be visible; false if it should be hidden
  - addSortListener
```
public Registration addSortListener(ComponentEventListener<SortEvent<Grid<T>,GridSortOrder<T>>> listener)
```
    Description copied from interface: SortEvent.SortNotifier
    
    Adds a sort order change listener that gets notified when the sort order changes.
    
    Specified by:
    
    addSortListener in interface SortEvent.SortNotifier<Grid<T>,GridSortOrder<T>>
    
    Parameters:
    
    listener - the sort order change listener to add
    
    Returns:
    
    a registration object for removing the listener
  - setMultiSort
```
public void setMultiSort(boolean multiSort)
```
    Sets whether multiple column sorting is enabled on the client-side.
    
    Parameters:
    
    multiSort - true to enable sorting of multiple columns on the client-side, false to disable
  - isMultiSort
```
public boolean isMultiSort()
```
    Gets whether multiple column sorting is enabled on the client-side.
    
    Returns:
    
    true if sorting of multiple columns is enabled, false otherwise
    
    See Also:
    
    setMultiSort(boolean)
  - addContextMenu
```
public GridContextMenu<T> addContextMenu()
```
    Adds a new context-menu for this grid.
    
    Returns:
    
    the added context-menu
  - sort
```
public void sort(List<GridSortOrder<T>> order)
```
    Forces a defined sort order for the columns in the Grid. Setting null or an empty list resets the ordering of all columns. Columns not mentioned in the list are reset to the unsorted state.
    For Grids with multi-sorting, the index of a given column inside the list defines the sort priority. For example, the column at index 0 of the list is sorted first, then on the index 1, and so on.
    
    Parameters:
    
    order - the list of sort orders to set on the client, or null to reset any sort orders.
    
    See Also:
    
    setMultiSort(boolean), getSortOrder()
  - onAttach
```
protected void onAttach(AttachEvent attachEvent)
```
    Description copied from class: Component
    
    Called when the component is attached to a UI.
    The default implementation does nothing.
    This method is invoked before the AttachEvent is fired for the component.
    
    Overrides:
    
    onAttach in class Component
    
    Parameters:
    
    attachEvent - the attach event
  - onDetach
```
protected void onDetach(DetachEvent detachEvent)
```
    Description copied from class: Component
    
    Called when the component is detached from a UI.
    The default implementation does nothing.
    This method is invoked before the DetachEvent is fired for the component.
    
    Overrides:
    
    onDetach in class Component
    
    Parameters:
    
    detachEvent - the detach event
  - getSortOrder
```
public List<GridSortOrder<T>> getSortOrder()
```
    Gets an list of the current sort orders in the Grid.
    
    Returns:
    
    an unmodifiable list of sort orders
  - createSortingComparator
```
protected SerializableComparator<T> createSortingComparator()
```
    Creates a comparator for grid to sort rows.
    
    Returns:
    
    the comparator based on column sorting information.
  - setHeightByRows
```
@Deprecated
public void setHeightByRows(boolean heightByRows)
```
    Deprecated. since 14.7 - use setAllRowsVisible(boolean)
    
    If true, the grid's height is defined by its rows. All items are fetched from the DataProvider, and the Grid shows no vertical scroll bar.
    Note: setHeightByRows disables the grid's virtual scrolling so that all the rows are rendered in the DOM at once. If the grid has a large number of items, using the feature is discouraged to avoid performance issues.
    
    Parameters:
    
    heightByRows - true to make Grid compute its height by the number of rows, false for the default behavior
    
    See Also:
    
    setAllRowsVisible(boolean)
  - isHeightByRows
```
@Synchronize(value="height-by-rows-changed")
 @Deprecated
public boolean isHeightByRows()
```
    Deprecated. since 14.7 - use isAllRowsVisible()
    
    Gets whether grid's height is defined by the number of its rows.
    
    Returns:
    
    true if Grid computes its height by the number of rows, false otherwise
    
    See Also:
    
    isAllRowsVisible()
  - setAllRowsVisible
```
public void setAllRowsVisible(boolean allRowsVisible)
```
    If true, the grid's height is defined by its rows. All items are fetched from the DataProvider, and the Grid shows no vertical scroll bar.
    Note: setAllRowsVisible disables the grid's virtual scrolling so that all the rows are rendered in the DOM at once. If the grid has a large number of items, using the feature is discouraged to avoid performance issues.
    
    Parameters:
    
    allRowsVisible - true to make Grid compute its height by the number of rows, false for the default behavior
  - isAllRowsVisible
```
@Synchronize(value="all-rows-visible-changed")
public boolean isAllRowsVisible()
```
    Gets whether grid's height is defined by the number of its rows.
    
    Returns:
    
    true if Grid computes its height by the number of rows, false otherwise
  - onEnabledStateChanged
```
public void onEnabledStateChanged(boolean enabled)
```
    Description copied from class: Component
    
    Handle component enable state when the enabled state changes.
    By default this sets or removes the 'disabled' attribute from the element. This can be overridden to have custom handling.
    
    Overrides:
    
    onEnabledStateChanged in class Component
    
    Parameters:
    
    enabled - the new enabled state of the component
  - addValueProvider
```
public Registration addValueProvider(String property,
                                     ValueProvider<T,?> valueProvider)
```
    Adds a ValueProvider to this Grid that is not tied to a Column. This is specially useful when the columns are defined via a template file instead of the Java API.
    The properties added to by this method are global to the Grid - they can be used in any column.
    ValueProviders are registered as DataGenerators in the Grid. See addDataGenerator(DataGenerator).
    
    Parameters:
    
    property - the property name used in the template. For example, in a template the uses [[item.name]], the property is name. Not null
    
    valueProvider - the provider for values for the property, not null
    
    Returns:
    
    a registration that can be used to remove the ValueProvider from the Grid
  - addDataGenerator
```
public Registration addDataGenerator(DataGenerator<T> dataGenerator)
```
    Description copied from interface: HasDataGenerators
    
    Adds the given data generator. If the generator was already added, does nothing.
    
    Specified by:
    
    addDataGenerator in interface HasDataGenerators<T>
    
    Parameters:
    
    dataGenerator - the data generator to add
    
    Returns:
    
    a registration that can be used to remove the data generator
  - removeDataGenerator
```
public void removeDataGenerator(DataGenerator<T> dataGenerator)
```
    Description copied from interface: HasDataGenerators
    
    Removes the given data generator.
    
    Specified by:
    
    removeDataGenerator in interface HasDataGenerators<T>
    
    Parameters:
    
    dataGenerator - the data generator to remove
  - compareMaybeComparables
```
protected static int compareMaybeComparables(Object a,
                                             Object b)
```
  - getBeanType
```
public Class<T> getBeanType()
```
    Returns the Class of bean this Grid is constructed with via Grid(Class). Or null if not constructed from a bean type.
    
    Returns:
    
    the Class of bean this Grid is constructed with
  - getPropertySet
```
public PropertySet<T> getPropertySet()
```
    Returns PropertySet of bean this Grid is constructed with via Grid(Class). Or null if not constructed from a bean type.
    
    Returns:
    
    the PropertySet of bean this Grid is constructed with
  - addItemClickListener
```
public Registration addItemClickListener(ComponentEventListener<ItemClickEvent<T>> listener)
```
    Adds an item click listener to this component.
    
    Parameters:
    
    listener - the listener to add, not null
    
    Returns:
    
    a handle that can be used for removing the listener
    
    See Also:
    
    addItemDoubleClickListener(ComponentEventListener)
  - addColumnResizeListener
```
public Registration addColumnResizeListener(ComponentEventListener<ColumnResizeEvent<T>> listener)
```
    Adds a column resize listener to this component. Note that the listener will be notified only for user-initiated column resize actions.
    
    Parameters:
    
    listener - the listener to add, not null
    
    Returns:
    
    a handle that can be used for removing the listener
  - addItemDoubleClickListener
```
public Registration addItemDoubleClickListener(ComponentEventListener<ItemDoubleClickEvent<T>> listener)
```
    Adds an item double click listener to this component.
    Note that double click event happens along with a click event. It means there is no way to get a double click event only (double click without a click): a click listener added using addItemClickListener(ComponentEventListener) (if any) will also be notified about a click event once a double click event is fired.
    Double click event type is not fully supported by the mobile browsers which means that double click event might not work (double click listeners won't be notified) for such browsers.
    
    Parameters:
    
    listener - the listener to add, not null
    
    Returns:
    
    a handle that can be used for removing the listener
    
    See Also:
    
    addItemClickListener(ComponentEventListener)
  - addCellFocusListener
```
public Registration addCellFocusListener(ComponentEventListener<CellFocusEvent<T>> listener)
```
    Adds a listener to the grid that will be notified, when a cell has been focused.
    
    The listener will be notified, when
    - the navigation focus of a cell gets activated
    - the focus is restored to the browser if a cell had navigation focus before the focus was lost
    - the navigation focus moves between header/body/footer sections
    The listener will not be notified, when
    - the focus changes between focusable elements in the Grid cells ("interaction mode")
    - on Grid Pro edit mode navigation ("interaction mode")
    - the focus changes between focusable elements in the cells in Flow Grid's editor mode ("interaction mode")
    Parameters:
    
    listener - the listener to add, not null
    
    Returns:
    
    a handle that can be used for removing the listener
  - setVerticalScrollingEnabled
```
public void setVerticalScrollingEnabled(boolean enabled)
```
    Enables or disables the vertical scrolling on the Grid web component. By default, the scrolling is enabled.
    
    Parameters:
    
    enabled - true to enable vertical scrolling, false to disabled it
  - isVerticalScrollingEnabled
```
public boolean isVerticalScrollingEnabled()
```
    Gets whether the vertical scrolling on the Grid web component is enabled.
    
    Returns:
    
    true if the vertical scrolling is enabled, false otherwise
  - getEditor
```
public Editor<T> getEditor()
```
    Gets the editor.
    The editor is created using createEditor().
    
    Returns:
    
    the editor instance
    
    See Also:
    
    createEditor()
  - setClassNameGenerator
```
public void setClassNameGenerator(SerializableFunction<T,String> classNameGenerator)
```
    Sets the function that is used for generating CSS class names for rows in this grid. Returning null from the generator results in no custom class name being set. Multiple class names can be returned from the generator as space-separated.
    If Grid.Column.setClassNameGenerator(SerializableFunction) is used together with this method, resulting class names from both methods will be effective. Class names generated by grid are applied to the cells before the class names generated by column. This means that if the classes contain conflicting style properties, column's classes will win.
    
    Parameters:
    
    classNameGenerator - the class name generator to set, not null
    
    Throws:
    
    NullPointerException - if classNameGenerator is null
    
    See Also:
    
    Grid.Column.setClassNameGenerator(SerializableFunction)
  - recalculateColumnWidths
```
public void recalculateColumnWidths()
```
    Updates the width of all columns which have autoWidth set to true.
    
    See Also:
    
    Grid.Column.setAutoWidth(boolean)
  - getClassNameGenerator
```
public SerializableFunction<T,String> getClassNameGenerator()
```
    Gets the function that is used for generating CSS class names for rows in this grid.
    
    Returns:
    
    the class name generator
  - createEditor
```
protected Editor<T> createEditor()
```
    Creates a new Editor instance. Can be overridden to create a custom Editor. If the Editor is a Grid.AbstractGridExtension, it will be automatically added to DataCommunicator.
    
    Returns:
    
    editor
  - getUniqueKeyProvider
```
protected ValueProvider<T,String> getUniqueKeyProvider()
```
    Gets optional value provider for unique key in row's generated JSON.
    
    Returns:
    
    ValueProvider for unique key for row or null if not set
  - setUniqueKeyProvider
```
protected void setUniqueKeyProvider(ValueProvider<T,String> uniqueKeyProvider)
```
    Sets value provider for unique key in row's generated JSON.
    null by default.
    
    Parameters:
    
    uniqueKeyProvider - ValueProvider for unique key for row
  - getUniqueKeyProperty
```
protected String getUniqueKeyProperty()
```
    Gets property name for unique key in row's generated JSON.
    
    Returns:
    
    the optional property name for unique key
  - setUniqueKeyProperty
```
protected void setUniqueKeyProperty(String uniqueKeyProperty)
```
    Sets property name for unique key in row's generated JSON.
    
    Parameters:
    
    uniqueKeyProperty - the new optional property name for unique key
  - getArrayUpdater
```
protected GridArrayUpdater getArrayUpdater()
```
  - onDataProviderChange
```
protected void onDataProviderChange()
```
    Callback which is called if a new data provider is set or any change happen in the current data provider (an DataChangeEvent event is fired). Default implementation closes the editor if it's opened.
    
    See Also:
    
    setDataProvider(DataProvider), DataChangeEvent, DataProviderListener
  - addDropListener
```
public Registration addDropListener(ComponentEventListener<GridDropEvent<T>> listener)
```
    Adds a drop listener to this component.
    
    Parameters:
    
    listener - the listener to add, not null
    
    Returns:
    
    a handle that can be used for removing the listener
  - addDragStartListener
```
public Registration addDragStartListener(ComponentEventListener<GridDragStartEvent<T>> listener)
```
    Adds a drag start listener to this component.
    
    Parameters:
    
    listener - the listener to add, not null
    
    Returns:
    
    a handle that can be used for removing the listener
  - addDragEndListener
```
public Registration addDragEndListener(ComponentEventListener<GridDragEndEvent<T>> listener)
```
    Adds a drag end listener to this component.
    
    Parameters:
    
    listener - the listener to add, not null
    
    Returns:
    
    a handle that can be used for removing the listener
  - setDropMode
```
public void setDropMode(GridDropMode dropMode)
```
    Sets the drop mode of this drop target. When set to not null, grid fires drop events upon data drop over the grid or the grid rows.
    When using GridDropMode.ON_TOP, and the grid is either empty or has empty space after the last row, the drop can still happen on the empty space, and the GridDropEvent.getDropTargetItem() will return an empty optional.
    When using GridDropMode.BETWEEN or GridDropMode.ON_TOP_OR_BETWEEN, and there is at least one row in the grid, any drop after the last row in the grid will get the last row as the GridDropEvent.getDropTargetItem(). If there are no rows in the grid, then it will return an empty optional.
    If using GridDropMode.ON_GRID, then the drop will not happen on any row, but instead just "on the grid". The target row will not be present in this case.
    NOTE: Prefer not using a row specific GridDropMode with a grid that enables sorting. If for example a new row gets added to a specific location on drop event, it might not end up in the location of the drop but rather where the active sorting configuration prefers to place it. This behavior might feel unexpected for the users.
    
    Parameters:
    
    dropMode - Drop mode that describes the allowed drop locations within the Grid's row. Can be null to disable dropping on the grid.
    
    See Also:
    
    GridDropEvent.getDropLocation()
  getDropMode
  
  public GridDropMode getDropMode()
  
  Gets the drop mode of this drop target.
  
  Returns:
  
  Drop mode that describes the allowed drop locations within the Grid's row. null if dropping is not enabled.
  
  setRowsDraggable
  
  public void setRowsDraggable(boolean rowsDraggable)
  
  Sets whether the user can drag the grid rows or not.
  
  Parameters:
  
  rowsDraggable - true if the rows can be dragged by the user; false if not
  
  isRowsDraggable
  
  public boolean isRowsDraggable()
  
  Gets whether rows of the grid can be dragged.
  
  Returns:
  
  true if the rows are draggable, false otherwise
  
  getDropFilter
  
  public SerializablePredicate<T> getDropFilter()
  
  Gets the active drop filter.
  
  Returns:
  
  The drop filter function
  
  getDragFilter
  
  public SerializablePredicate<T> getDragFilter()
  
  Gets the active drag filter.
  
  Returns:
  
  The drag filter function
  
  setDropFilter
  
  public void setDropFilter(SerializablePredicate<T> dropFilter)
  
  Sets the drop filter for this drag target.
  When the drop mode of the grid has been set to one of GridDropMode.BETWEEN, GridDropMode.ON_TOP or GridDropMode.ON_TOP_OR_BETWEEN, by default all the visible rows can be dropped over.
  A drop filter function can be used to specify the rows that are available for dropping over. The function receives an item and should return true if the row can be dropped over, false otherwise.
  NOTE: If the filter conditions depend on a specific row that's currently being dragged, you might want to have the grid's drop mode disabled by default and set its value only on drag start to avoid the small period of time during which the user might be able to drop over unwanted rows. Once the drop end event occurs, the drop mode can be set back to null to keep this consistent.
  NOTE: If the filtering conditions change dynamically, remember to explicitly invoke getDataProvider().refreshItem(item) for the relevant items to get the filters re-run for them.
  
  setDragFilter
  
  public void setDragFilter(SerializablePredicate<T> dragFilter)
  
  Sets the drag filter for this drag source.
  When the setRowsDraggable(boolean) has been used to enable dragging, by default all the visible rows can be dragged.
  A drag filter function can be used to specify the rows that are available for dragging. The function receives an item and returns true if the row can be dragged, false otherwise.
  NOTE: If the filtering conditions change dynamically, remember to explicitly invoke getDataProvider().refreshItem(item) for the relevant items to get the filters re-run for them.
  
  setDragDataGenerator
  
  public void setDragDataGenerator(String type, SerializableFunction<T,String> dragDataGenerator)
  
  Sets a generator function for customizing drag data. The generated value will be accessible using the same type as the generator is set here. The function is executed for each item in the Grid during data generation. Return a String to be appended to the row as type data.
  Note that IE11 only supports data type "text"
  
  Parameters:
  
  type - Type of the generated data. The generated value will be accessible during drop using this type.
  
  dragDataGenerator - Function to be executed on row data generation.
  
  setSelectionDragDetails
  
  public void setSelectionDragDetails(int draggedItemsCount, Map<String,String> dragData)
  
  Sets explicit drag operation details for when the user is dragging the selected items. By default, the drag data only covers the items in the visible viewport and all the items outside of it, even if selected, are excluded. Use this method to override the default drag data and the number shown in drag image on selection drag.
  Note that IE11 only supports data type "text"
  
  Parameters:
  
  draggedItemsCount - The number shown in the drag image on selection drag. Only values above 1 have any visible effect.
  
  dragData - The drag data for selection drag. The map should consist of data type:data -entries
  
  addColumnReorderListener
  
  public Registration addColumnReorderListener(ComponentEventListener<ColumnReorderEvent<T>> listener)
  
  Adds a column reorder listener to this component.
  
  Parameters:
  
  listener - the listener to add, not null
  
  Returns:
  
  a handle that can be used for removing the listener
  
  setColumnOrder
  
  public void setColumnOrder(Grid.Column<T>... columns)
  
  Sets a new column order for the grid.
  The function doesn't support column removal: all columns must be present in the list, otherwise IllegalArgumentException is thrown.
  The getColumns() function will reflect the new column ordering.
  Fires the ColumnReorderEvent with ComponentEvent.isFromClient() returning false.
  The method is atomic: if the requested reordering is not achievable, the function fails cleanly with IllegalArgumentException without doing any work.
  
  Parameters:
  
  columns - the new ordering of the columns, not null.
  
  Throws:
  
  NullPointerException - if the columns parameter is null.
  
  IllegalArgumentException - if a column is present two times in the list, or if the column is not owned by this Grid, or if the list doesn't contain all columns currently present in the Grid, or if the column rearranging would require to split a joined header/footer cell group.
  
  See Also:
  
  setColumnOrder(List)
  
  setColumnOrder
  
  public void setColumnOrder(List<Grid.Column<T>> columns)
  
  Sets a new column order for the grid.
  The function doesn't support column removal: all columns must be present in the list, otherwise IllegalArgumentException is thrown.
  The getColumns() function will reflect the new column ordering.
  Fires the ColumnReorderEvent with ComponentEvent.isFromClient() returning false.
  The method is atomic: if the requested reordering is not achievable, the function fails cleanly with IllegalArgumentException without doing any work.
  
  Parameters:
  
  columns - the new ordering of the columns, not null.
  
  Throws:
  
  NullPointerException - if the columns parameter is null.
  
  IllegalArgumentException - if a column is present two times in the list, or if the column is not owned by this Grid, or if the list doesn't contain all columns currently present in the Grid, or if the column rearranging would require to split a joined header/footer cell group.
  
  See Also:
  
  setColumnOrder(Column[])
  
  scrollToIndex
  
  public void scrollToIndex(int rowIndex)
  
  Scrolls to the given row index. Scrolls so that the row is shown at the start of the visible area whenever possible. If the index parameter exceeds current item set size the grid will scroll to the end.
  
  Parameters:
  
  rowIndex - zero based index of the item to scroll to in the current view.
  
  scrollToStart
  
  public void scrollToStart()
  
  Scrolls to the beginning of the first data row.
  
  scrollToEnd
  
  public void scrollToEnd()
  
  Scrolls to the last data row of the grid.
  
  setNestedNullBehavior
  
  public void setNestedNullBehavior(Grid.NestedNullBehavior nestedNullBehavior)
  
  Set the behavior when facing nested null values. By default the value is NestedNullBehavior.THROW.
  
  Parameters:
  
  nestedNullBehavior - the behavior when facing nested null values.
  
  getNestedNullBehavior
  
  public Grid.NestedNullBehavior getNestedNullBehavior()
  
  Get the behavior when facing nested null values.
  
  Returns:
  
  The current behavior when facing nested null values.

Class Grid<T>

Nested Class Summary

Nested classes/interfaces inherited from interface com.vaadin.flow.component.BlurNotifier

Nested classes/interfaces inherited from interface com.vaadin.flow.component.FocusNotifier

Constructor Summary

Method Summary

Methods inherited from class com.vaadin.flow.component.Component

Methods inherited from class java.lang.Object

Methods inherited from interface com.vaadin.flow.data.binder.HasDataProvider

Methods inherited from interface com.vaadin.flow.data.binder.HasItems

Methods inherited from interface com.vaadin.flow.component.HasStyle

Methods inherited from interface com.vaadin.flow.component.HasSize

Methods inherited from interface com.vaadin.flow.component.Focusable

Methods inherited from interface com.vaadin.flow.component.BlurNotifier

Methods inherited from interface com.vaadin.flow.component.FocusNotifier

Methods inherited from interface com.vaadin.flow.component.HasEnabled

Methods inherited from interface com.vaadin.flow.component.HasElement

Methods inherited from interface com.vaadin.flow.component.HasTheme

Methods inherited from interface com.vaadin.flow.component.AttachNotifier

Methods inherited from interface com.vaadin.flow.component.DetachNotifier

Constructor Detail

Grid

Grid

Grid

Grid

Grid

Grid

Method Detail

initConnector

createDefaultArrayUpdater

addColumn

addColumn

addComponentColumn

addColumn

addColumn

addColumn

createColumn

getDefaultColumnFactory

addColumn

addColumn

addColumn

addColumn

addColumns

setColumns

setSortableColumns

setColumnKey

createColumnId

prependHeaderRow

appendHeaderRow

addFirstHeaderRow

getDefaultHeaderRow

prependFooterRow

appendFooterRow

getColumnLayers

getHeaderRows

getFooterRows

addThemeVariants

removeThemeVariants

insertColumnLayer

removeColumnLayer

setDataProvider

getDataProvider

getDataCommunicator

getPageSize

setPageSize

getSelectionModel

setSelectionModel

updateSelectionModeOnClient

setSelectionMode

asSingleSelect

asMultiSelect

getSelectedItems

select

deselect

deselectAll

addSelectionListener

setItemDetailsRenderer

isColumnReorderingAllowed

setColumnReorderingAllowed

getColumns