Package com.vaadin.flow.component.accordion

Class Accordion.OpenedChangeEvent

java.lang.Object

java.util.EventObject

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

com.vaadin.flow.component.accordion.Accordion.OpenedChangeEvent

All Implemented Interfaces:

Serializable

Enclosing class:

Accordion

@DomEvent("opened-changed")
public static class Accordion.OpenedChangeEvent
extends ComponentEvent<Accordion>

An event fired when an Accordion is opened or closed.

See Also:

• Serialized Form

Field Summary

Fields inherited from class java.util.EventObject

source

Constructor Summary

Constructors

Constructor	Description
OpenedChangeEvent(Accordion source, boolean fromClient, Integer index)	Creates a new event using the given source and indicator whether the event originated from the client side or the server side.

Method Summary

Modifier and Type	Method	Description
OptionalInt	getOpenedIndex()	Gets the index of the opened panel or null if the accordion is closed.
Optional<AccordionPanel>	getOpenedPanel()	Gets the opened panel.

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

getSource, isFromClient, unregisterListener

Methods inherited from class java.util.EventObject

toString

Methods inherited from class java.lang.Object

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

Constructor Details

OpenedChangeEvent

public OpenedChangeEvent(Accordion source,
 boolean fromClient,
 @EventData("event.detail.value")
 Integer index)

Creates a new event using the given source and indicator whether the event originated from the client side or the server side.

Parameters:

source - the source component

fromClient - true if the event originated from the client

index - the index of the opened panel or null if the accordion is closed

Method Details

getOpenedIndex

public OptionalInt getOpenedIndex()

Gets the index of the opened panel or null if the accordion is closed.

Returns:

the index of the opened panel or null if closed

getOpenedPanel

public Optional<AccordionPanel> getOpenedPanel()

Gets the opened panel. Caution should be exercised when using this method with an Accordion which along with its panels were created in a template. Such template children would by default not be children of the Accordion Flow component, thus making it possible for this method to return the wrong panel in such cases.

Returns:

the opened panel.