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com.vaadin.flow.component.listbox.
Class MultiSelectListBox<T>
- java.lang.Object
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- com.vaadin.flow.component.Component
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- com.vaadin.flow.component.AbstractField<C,T>
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- com.vaadin.flow.component.AbstractSinglePropertyField<C,VALUE>
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- com.vaadin.flow.component.listbox.ListBoxBase<MultiSelectListBox<T>,T,Set<T>>
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- com.vaadin.flow.component.listbox.MultiSelectListBox<T>
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Type Parameters:
T- the type of the items contained by this componentAll Implemented Interfaces:
AttachNotifier, DetachNotifier, HasComponents, HasElement, HasEnabled, HasSize, HasValue<AbstractField.ComponentValueChangeEvent<MultiSelectListBox<T>,Set<T>>,Set<T>>, HasValueAndElement<AbstractField.ComponentValueChangeEvent<MultiSelectListBox<T>,Set<T>>,Set<T>>, HasItemComponents<T>, HasDataView<T,Void,ListBoxDataView<T>>, HasListDataView<T,ListBoxListDataView<T>>, MultiSelect<MultiSelectListBox<T>,T>, Serializable
public class MultiSelectListBox<T> extends ListBoxBase<MultiSelectListBox<T>,T,Set<T>> implements MultiSelect<MultiSelectListBox<T>,T>Server-side component for the
vaadin-list-boxelement with multi-selection.Author:
Vaadin Ltd
See Also:
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Nested Class Summary
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Nested classes/interfaces inherited from class com.vaadin.flow.component.AbstractField
AbstractField.ComponentValueChangeEvent<C extends Component,V>
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Nested classes/interfaces inherited from interface com.vaadin.flow.component.HasValue
HasValue.ValueChangeEvent<V>, HasValue.ValueChangeListener<E extends HasValue.ValueChangeEvent<?>>
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Nested classes/interfaces inherited from interface com.vaadin.flow.data.binder.HasItemComponents
HasItemComponents.ItemComponent<T>
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Constructor Summary
Constructors Constructor and Description MultiSelectListBox()Creates a new list box component with multi-selection.
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Method Summary
All Methods Modifier and Type Method and Description RegistrationaddSelectionListener(MultiSelectionListener<MultiSelectListBox<T>,T> listener)Adds a selection listener that will be called when the selection is changed either by the user or programmatically.
Set<T>getSelectedItems()Returns an immutable set of the currently selected items.
voidsetValue(Set<T> value)Sets the value of this component.
voidupdateSelection(Set<T> addedItems, Set<T> removedItems)Updates the selection by adding and removing the given items from it.
protected booleanvalueEquals(Set<T> value1, Set<T> value2)Compares two value instances to each other to determine whether they are equal.
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Methods inherited from class com.vaadin.flow.component.listbox.ListBoxBase
getDataProvider, getGenericDataView, getItemEnabledProvider, getItemId, getItemRenderer, getListDataView, onAttach, onDetach, onEnabledStateChanged, setDataProvider, setItemEnabledProvider, setItems, setItems, setItems, setItems, setRenderer, setRequiredIndicatorVisible
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Methods inherited from class com.vaadin.flow.component.AbstractSinglePropertyField
getSynchronizationRegistration, hasValidValue, setPresentationValue, setSynchronizedEvent
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Methods inherited from class com.vaadin.flow.component.AbstractField
addValueChangeListener, getEmptyValue, getValue, isEmpty, setModelValue
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Methods inherited from class com.vaadin.flow.component.Component
addListener, fireEvent, from, get, getChildren, getElement, getEventBus, getId, getLocale, getParent, getTranslation, getTranslation, getUI, hasListener, isAttached, isTemplateMapped, isVisible, set, setElement, setId, setVisible
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface com.vaadin.flow.data.selection.MultiSelect
deselect, deselect, deselectAll, getEmptyValue, getValue, isSelected, select, select
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Methods inherited from interface com.vaadin.flow.component.HasValueAndElement
isReadOnly, isRequiredIndicatorVisible, setReadOnly, setRequiredIndicatorVisible
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Methods inherited from interface com.vaadin.flow.component.HasValue
addValueChangeListener, clear, getOptionalValue, isEmpty
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Methods inherited from interface com.vaadin.flow.component.HasEnabled
isEnabled, setEnabled
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Methods inherited from interface com.vaadin.flow.component.HasElement
getElement
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Methods inherited from interface com.vaadin.flow.data.binder.HasItemComponents
addComponents, getItemPosition, prependComponents
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Methods inherited from interface com.vaadin.flow.component.HasComponents
add, add, addComponentAsFirst, addComponentAtIndex, remove, removeAll
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Methods inherited from interface com.vaadin.flow.component.HasSize
getCssSize, getHeight, getMaxHeight, getMaxWidth, getMinHeight, getMinWidth, getWidth, setHeight, setHeight, setHeightFull, setMaxHeight, setMaxHeight, setMaxWidth, setMaxWidth, setMinHeight, setMinHeight, setMinWidth, setMinWidth, setSizeFull, setSizeUndefined, setWidth, setWidth, setWidthFull
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Methods inherited from interface com.vaadin.flow.data.provider.HasListDataView
setItems, setItems
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Methods inherited from interface com.vaadin.flow.component.AttachNotifier
addAttachListener
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Methods inherited from interface com.vaadin.flow.component.DetachNotifier
addDetachListener
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Constructor Detail
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MultiSelectListBox
public MultiSelectListBox()Creates a new list box component with multi-selection.
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Method Detail
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setValue
public void setValue(Set<T> value)Sets the value of this component. If the new value is not equal to the previous value, fires a value change event.
The component doesn't accept
nullvalues. The value of multi select list box without any selected items is an empty set. You can use theHasValue.clear()method to set the empty value.Specified by:
setValuein interfaceHasValue<AbstractField.ComponentValueChangeEvent<MultiSelectListBox<T>,Set<T>>,Set<T>>Specified by:
setValuein interfaceMultiSelect<MultiSelectListBox<T>,T>Overrides:
setValuein classAbstractField<MultiSelectListBox<T>,Set<T>>Parameters:
value- the new value to set, notnullThrows:
NullPointerException- if value isnull
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updateSelection
public void updateSelection(Set<T> addedItems, Set<T> removedItems)Description copied from interface:
MultiSelectUpdates 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 and remove sets) are ignored.
Specified by:
updateSelectionin interfaceMultiSelect<MultiSelectListBox<T>,T>Parameters:
addedItems- the items to add, notnullremovedItems- the items to remove, notnull
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getSelectedItems
public Set<T> getSelectedItems()Returns an immutable set of the currently selected items. It is safe to invoke other
SelectionModelmethods while iterating over the set.There are no guarantees of the iteration order of the returned set of items.
Specified by:
getSelectedItemsin interfaceMultiSelect<MultiSelectListBox<T>,T>Returns:
the items in the current selection, not
null
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addSelectionListener
public Registration addSelectionListener(MultiSelectionListener<MultiSelectListBox<T>,T> listener)Description copied from interface:
MultiSelectAdds a selection listener that will be called when the selection is changed either by the user or programmatically.
Specified by:
addSelectionListenerin interfaceMultiSelect<MultiSelectListBox<T>,T>Parameters:
listener- the value change listener, notnullReturns:
a registration for the listener
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valueEquals
protected boolean valueEquals(Set<T> value1, Set<T> value2)Compares two value instances to each other to determine whether they are equal. Equality is used to determine whether to update internal state and fire an event when
AbstractField.setValue(Object)orAbstractField.setModelValue(Object, boolean)is called. Subclasses can override this method to define an alternative comparison method instead ofObject.equals(Object).Overrides:
valueEqualsin classAbstractField<MultiSelectListBox<T>,Set<T>>Parameters:
value1- the first set of instancevalue2- the second set of instanceReturns:
trueif sets are equal in size and also the items; otherwisefalse
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