Package com.vaadin.flow.component

Class AbstractField.ComponentValueChangeEvent<C extends Component,V>

java.lang.Object

java.util.EventObject

com.vaadin.flow.component.ComponentEvent<C>

com.vaadin.flow.component.AbstractField.ComponentValueChangeEvent<C,V>

Type Parameters:

C - the source component type

V - the value type

All Implemented Interfaces:

HasValue.ValueChangeEvent<V>, Serializable

Direct Known Subclasses:

MultiSelectionEvent, SingleSelectionEvent

Enclosing class:

AbstractField<C extends AbstractField<C,T>,T>

public static class AbstractField.ComponentValueChangeEvent<C extends Component,V>
extends ComponentEvent<C>
implements HasValue.ValueChangeEvent<V>

Value change event fired by components.

Since:

1.0

Author:

Vaadin Ltd

See Also:

• Serialized Form

Field Summary

Fields inherited from class java.util.EventObject

source

Constructor Summary

Constructors

Constructor	Description
ComponentValueChangeEvent(C source, HasValue<?,V> hasValue, V oldValue, boolean fromClient)	Creates a new component value change event.

Method Summary

Modifier and Type	Method	Description
HasValue<?,V>	getHasValue()
V	getOldValue()	Returns the value of the source before this value change event occurred.
V	getValue()	Returns the new value that triggered this value change event.
String	toString()

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

getSource, isFromClient, unregisterListener

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.vaadin.flow.component.HasValue.ValueChangeEvent

isFromClient

Constructor Details

ComponentValueChangeEvent

public ComponentValueChangeEvent(C source,
 HasValue<?,V> hasValue,
 V oldValue,
 boolean fromClient)

Creates a new component value change event.

Parameters:

source - the source component

hasValue - the HasValue from which the value originates

oldValue - the old value

fromClient - whether the value change originated from the client

Method Details

getOldValue

public V getOldValue()

Description copied from interface: HasValue.ValueChangeEvent

Returns the value of the source before this value change event occurred.

Specified by:

getOldValue in interface HasValue.ValueChangeEvent<C extends Component>

Returns:

the value previously held by the source of this event

getValue

public V getValue()

Description copied from interface: HasValue.ValueChangeEvent

Returns the new value that triggered this value change event.

Specified by:

getValue in interface HasValue.ValueChangeEvent<C extends Component>

Returns:

the new value

getHasValue

public HasValue<?,V> getHasValue()

This is typically the same instance as ComponentEvent.getSource(), but in some cases the HasValue implementation is separated from the component implementation.

Specified by:

getHasValue in interface HasValue.ValueChangeEvent<C extends Component>

toString

public String toString()

Overrides:

toString in class EventObject