Interface MultiSelect<T>

Method Detail

• select

  default void select​(T... items)

  Adds the given items to the set of currently selected items.

  By default this does not clear any previous selection. To do that, use deselectAll().

  If the all the items were already selected, this is a NO-OP.

  This is a short-hand for updateSelection(Set, Set) with nothing to deselect.

  Parameters:

  items - to add to selection, not null

• deselect

  default void deselect​(T... items)

  Removes the given items from the set of currently selected items.

  If the none of the items were selected, this is a NO-OP.

  This is a short-hand for updateSelection(Set, Set) with nothing to select.

  Parameters:

  items - to remove from selection, not null

• updateSelection

  void updateSelection​(Set<T> addedItems,
                       Set<T> removedItems)

  Updates the selection by adding and removing the given items from it.

  If all the added items were already selected and the removed items were not selected, this is a NO-OP.

  Duplicate items (in both add & remove sets) are ignored and removed from the sets.

  Parameters:

  addedItems - the items to add, not null

  removedItems - the items to remove, not null

• getSelectedItems

  Set<T> getSelectedItems()

  Returns an immutable set of the currently selected items. It is safe to invoke other SelectionModel methods while iterating over the set.

  Implementation note: the iteration order of the items in the returned set should be well-defined and documented by the implementing class.

  Returns:

  the items in the current selection, not null

• deselectAll

  default void deselectAll()

  Deselects all currently selected items.

• isSelected

  default boolean isSelected​(T item)

  Returns whether the given item is currently selected.

  Parameters:

  item - the item to check, not null

  Returns:

  true if the item is selected, false otherwise

• addSelectionListener

  Registration addSelectionListener​(MultiSelectionListener<T> listener)

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

  Parameters:

  listener - the value change listener, not null

  Returns:

  a registration for the listener

• getEmptyValue

  default Set<T> getEmptyValue()

  MultiSelect empty value should always be an empty set by default and not null.

  Specified by:

  getEmptyValue in interface HasValue<T>

  Returns:

  An empty set, not null

  See Also:

  Binder#bind(HasValue, ValueProvider, Setter)