IExpansionListener (Eclipse Platform API Specification)

All Known Implementing Classes:

ExpansionAdapter
```
public interface IExpansionListener
```
Classes that implement this interface will be notified before and after the expandable control's expansion state changes.

Since:

3.0

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`expansionStateChanged(ExpansionEvent e)`	Notifies the listener after the expandable control has changed its expansion state.
`void`	`expansionStateChanging(ExpansionEvent e)`	Notifies the listener that the expandable control is about to change its expansion state.

- Method Detail
  - expansionStateChanging
```
void expansionStateChanging(ExpansionEvent e)
```
    Notifies the listener that the expandable control is about to change its expansion state. The state provided by the event is the new state.
    
    Parameters:
    
    e - the expansion event
  - expansionStateChanged
```
void expansionStateChanged(ExpansionEvent e)
```
    Notifies the listener after the expandable control has changed its expansion state. The state provided by the event is the new state.
    
    Parameters:
    
    e - the expansion event