com.vaadin.flow.demo

Class WhenDefinedManager

java.lang.Object

com.vaadin.flow.demo.WhenDefinedManager

All Implemented Interfaces:

Serializable

public class WhenDefinedManager
extends Object
implements Serializable

Helper that invokes a callback once all Vaadin custom elements from a component tree are defined. This is used for all demo contents because of the way custom element definitions are lazy loaded to improve performance on vaadin.com.

Author:

Vaadin Ltd

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
static WhenDefinedManager	get(com.vaadin.flow.component.UI ui) Gets or creates the manager instance for the given UI.
void	whenDefined(com.vaadin.flow.component.Component[] rootComponents, com.vaadin.flow.server.Command command) Runs the provided command once the custom element has been defined for all Vaadin elements from the give component trees have.

Methods inherited from class java.lang.Object

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

Method Detail

whenDefined

public void whenDefined(com.vaadin.flow.component.Component[] rootComponents,
                        com.vaadin.flow.server.Command command)

Runs the provided command once the custom element has been defined for all Vaadin elements from the give component trees have.

The command may run immediately in case no custom elements are used or if they have already been defined.

Parameters:

rootComponents - an array of component hierarchies from which to find used Vaadin elements

command - the command to run once all custom elements are defined

get

public static WhenDefinedManager get(com.vaadin.flow.component.UI ui)

Gets or creates the manager instance for the given UI.

Parameters:

ui - the UI for which to get an instance, not null

Returns:

the manager for the given UI, not null