com.vaadin.ui.Tree.ExpandEvent API 7.7.46 | Vaadin

com.vaadin.ui.

java.lang.Object
- java.util.EventObject
- - com.vaadin.event.ConnectorEvent
  - - com.vaadin.ui.Component.Event
    - - com.vaadin.ui.Tree.ExpandEvent

All Implemented Interfaces:

Serializable

Enclosing class:

Tree
```
public static class Tree.ExpandEvent
extends Component.Event
```
Event to fired when a node is expanded. ExapandEvent is fired when a node is to be expanded. it can me used to dynamically fill the sub-nodes of the node.

Since:

3.0

Author:

Vaadin Ltd.

See Also:

Serialized Form

- Field Summary
  - Fields inherited from class java.util.EventObject
    source
- Constructor Summary
  
  Constructors
  Constructor Description
  
  ExpandEvent(Component source, Object expandedItemId)
  New instance of options change event
- Method Summary
  
  All Methods
  Modifier and Type Method Description
  
  Object getItemId()
  Node where the event occurred.
  - Methods inherited from class com.vaadin.ui.Component.Event
    getComponent
  - Methods inherited from class com.vaadin.event.ConnectorEvent
    getConnector
  - Methods inherited from class java.util.EventObject
    getSource, toString
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - ExpandEvent
```
public ExpandEvent(Component source,
                   Object expandedItemId)
```
    New instance of options change event
    
    Parameters:
    
    source - the Source of the event.
    
    expandedItemId -
- Method Detail
  - getItemId
```
public Object getItemId()
```
    Node where the event occurred.
    
    Returns:
    
    the Source of the event.