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## org.eclipse.swt.events
Interface FocusListener

All Superinterfaces:
  EventListener, org.eclipse.swt.internal.SWTEventListener

All Known Implementing Classes:
  FocusAdapter

public interface FocusListener
extends org.eclipse.swt.internal.SWTEventListener

Classes which implement this interface provide methods that deal with the events that are generated as controls gain and lose focus.

After creating an instance of a class that implements this interface it can be added to a control using the `addFocusListener` method and removed using the `removeFocusListener` method. When a control gains or loses focus, the appropriate method will be invoked.

See Also:
  `FocusAdapter`, `FocusEvent`

Method Summary
`void` | `focusGained(FocusEvent e)` Sent when a control gets focus.
`void` | `focusLost(FocusEvent e)` Sent when a control loses focus.

Method Detail

### focusGained

    public void focusGained(FocusEvent e)

  Sent when a control gets focus.

  Parameters:
    `e` - an event containing information about the focus change

### focusLost

    public void focusLost(FocusEvent e)

  Sent when a control loses focus.

  Parameters:
    `e` - an event containing information about the focus change

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