com.vaadin.flow.component.grid

Class AbstractGridSingleSelectionModel<T>

java.lang.Object

com.vaadin.flow.component.grid.Grid.AbstractGridExtension<T>

com.vaadin.flow.component.grid.AbstractGridSingleSelectionModel<T>

Type Parameters:

T - the grid type

All Implemented Interfaces:

GridSelectionModel<T>, GridSingleSelectionModel<T>, DataGenerator<T>, SelectionModel<Grid<T>,T>, SelectionModel.Single<Grid<T>,T>, Serializable

public abstract class AbstractGridSingleSelectionModel<T>
extends Grid.AbstractGridExtension<T>
implements GridSingleSelectionModel<T>

Abstract implementation of a GridSingleSelectionModel.

Author:

Vaadin Ltd.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface com.vaadin.flow.data.selection.SelectionModel

SelectionModel.Multi<C extends Component,T>, SelectionModel.Single<C extends Component,T>

Constructor Summary

Constructors

Constructor and Description
AbstractGridSingleSelectionModel(Grid<T> grid) Constructor for passing a reference of the grid to this implementation.

Method Summary

Modifier and Type	Method and Description
Registration	addSelectionListener(SelectionListener<Grid<T>,T> listener) Adds a generic listener to this selection model, accepting both single and multiselection events.
Registration	addSingleSelectionListener(SingleSelectionListener<Grid<T>,T> listener) Adds a selection listener that will be called when the selection is changed either by the user or programmatically.
SingleSelect<Grid<T>,T>	asSingleSelect() Gets a wrapper to use this single selection model as a single select in Binder.
void	deselect(T item) Deselects the given item.
void	deselectFromClient(T item) Handles the deselection of an item that originates from the client.
protected abstract void	fireSelectionEvent(SelectionEvent<Grid<T>,T> event) Method for handling the firing of selection events.
void	generateData(T item, elemental.json.JsonObject jsonObject) Adds custom data for the given item to its serialized JsonObject representation.
Optional<T>	getSelectedItem() Returns the currently selected item, or an empty optional if no item is selected.
boolean	isDeselectAllowed() Gets whether it's allowed to deselect the selected row through the UI.
protected void	remove() Remove this extension from its target.
void	select(T item) Selects the given item.
void	selectFromClient(T item) Handles the selection of an item that originates from the client.
void	setDeselectAllowed(boolean deselectAllowed) Sets whether it's allowed to deselect the selected row through the UI.

Methods inherited from class com.vaadin.flow.component.grid.Grid.AbstractGridExtension

extend, getGrid, refresh

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.selection.SelectionModel.Single

deselectAll, getFirstSelectedItem, getSelectedItems, setSelectedItem

Methods inherited from interface com.vaadin.flow.data.selection.SelectionModel

isSelected

Methods inherited from interface com.vaadin.flow.data.provider.DataGenerator

destroyAllData, destroyData, refreshData

Constructor Detail

AbstractGridSingleSelectionModel

public AbstractGridSingleSelectionModel(Grid<T> grid)

Constructor for passing a reference of the grid to this implementation.

Parameters:

grid - reference to the grid for which this selection model is created

Method Detail

selectFromClient

public void selectFromClient(T item)

Description copied from interface: GridSelectionModel

Handles the selection of an item that originates from the client.

Specified by:

selectFromClient in interface GridSelectionModel<T>

Parameters:

item - the item being selected

select

public void select(T item)

Description copied from interface: SelectionModel

Selects the given item. Depending on the implementation, may cause other items to be deselected. If the item is already selected, does nothing.

Specified by:

select in interface SelectionModel<Grid<T>,T>

Specified by:

select in interface SelectionModel.Single<Grid<T>,T>

Parameters:

item - the item to select, not null

deselectFromClient

public void deselectFromClient(T item)

Description copied from interface: GridSelectionModel

Handles the deselection of an item that originates from the client.

Specified by:

deselectFromClient in interface GridSelectionModel<T>

Parameters:

item - the item beign deselected

deselect

public void deselect(T item)

Description copied from interface: SelectionModel

Deselects the given item. If the item is not currently selected, does nothing.

Specified by:

deselect in interface SelectionModel<Grid<T>,T>

Parameters:

item - the item to deselect, not null

getSelectedItem

public Optional<T> getSelectedItem()

Description copied from interface: SelectionModel.Single

Returns the currently selected item, or an empty optional if no item is selected.

Specified by:

getSelectedItem in interface SelectionModel.Single<Grid<T>,T>

Returns:

an optional of the selected item if any, an empty optional otherwise

setDeselectAllowed

public void setDeselectAllowed(boolean deselectAllowed)

Description copied from interface: SelectionModel.Single

Sets whether it's allowed to deselect the selected row through the UI. Deselection is allowed by default.

Specified by:

setDeselectAllowed in interface SelectionModel.Single<Grid<T>,T>

Parameters:

deselectAllowed - true if the selected row can be deselected without selecting another row instead; otherwise false.

isDeselectAllowed

public boolean isDeselectAllowed()

Description copied from interface: SelectionModel.Single

Gets whether it's allowed to deselect the selected row through the UI.

Specified by:

isDeselectAllowed in interface SelectionModel.Single<Grid<T>,T>

Returns:

true if deselection is allowed; otherwise false

asSingleSelect

public SingleSelect<Grid<T>,T> asSingleSelect()

Description copied from interface: GridSingleSelectionModel

Gets a wrapper to use this single selection model as a single select in Binder.

Specified by:

asSingleSelect in interface GridSingleSelectionModel<T>

Returns:

the single select wrapper

addSelectionListener

public Registration addSelectionListener(SelectionListener<Grid<T>,T> listener)

Description copied from interface: SelectionModel

Adds a generic listener to this selection model, accepting both single and multiselection events.

Specified by:

addSelectionListener in interface SelectionModel<Grid<T>,T>

Parameters:

listener - the listener to add, not null

Returns:

a registration handle for removing the listener

addSingleSelectionListener

public Registration addSingleSelectionListener(SingleSelectionListener<Grid<T>,T> listener)

Description copied from interface: GridSingleSelectionModel

Adds a selection listener that will be called when the selection is changed either by the user or programmatically.

Specified by:

addSingleSelectionListener in interface GridSingleSelectionModel<T>

Parameters:

listener - the single selection listener, not null

Returns:

a registration for the listener

generateData

public void generateData(T item,
                         elemental.json.JsonObject jsonObject)

Description copied from interface: DataGenerator

Adds custom data for the given item to its serialized JsonObject representation. This JSON object will be sent to client-side DataProvider.

Specified by:

generateData in interface DataGenerator<T>

Parameters:

item - the data item being serialized

jsonObject - the JSON object being sent to the client

remove

protected void remove()

Description copied from class: Grid.AbstractGridExtension

Remove this extension from its target.

Overrides:

remove in class Grid.AbstractGridExtension<T>

fireSelectionEvent

protected abstract void fireSelectionEvent(SelectionEvent<Grid<T>,T> event)

Method for handling the firing of selection events.

Parameters:

event - the selection event to fire