ButtonGroupListener

All Known Implementing Classes:

ButtonGroupListener.Adapter, ButtonGroupListener.Listeners
```
public interface ButtonGroupListener
```
Button group listener interface.

Nested Class Summary

Nested Classes
Modifier and Type	Interface	Description
`static class`	`ButtonGroupListener.Adapter`	Deprecated. Since 2.1 and Java 8 the interface itself has default implementations.
`static class`	`ButtonGroupListener.Listeners`	The button group listener listeners list.

Method Summary

All Methods Instance Methods Default Methods
Modifier and Type	Method	Description
`default void`	`buttonAdded(ButtonGroup buttonGroup, Button button)`	Called when a button has been added to a button group.
`default void`	`buttonRemoved(ButtonGroup buttonGroup, Button button)`	Called when a button has been removed from a button group.
`default void`	`selectionChanged(ButtonGroup buttonGroup, Button previousSelection)`	Called when a button group's selection has changed.

- Method Detail
  - buttonAdded
```
default void buttonAdded(ButtonGroup buttonGroup,
                         Button button)
```
    Called when a button has been added to a button group.
    
    Parameters:
    
    buttonGroup - The button group that has changed.
    
    button - The button that was added to the group.
  - buttonRemoved
```
default void buttonRemoved(ButtonGroup buttonGroup,
                           Button button)
```
    Called when a button has been removed from a button group.
    
    Parameters:
    
    buttonGroup - The button group that has changed.
    
    button - The button that was removed from the group.
  - selectionChanged
```
default void selectionChanged(ButtonGroup buttonGroup,
                              Button previousSelection)
```
    Called when a button group's selection has changed.
    
    Parameters:
    
    buttonGroup - The button group that changed.
    
    previousSelection - The previously selected button in the group.