BasicComboBoxUI.FocusHandler (Java SE 22 & JDK 22)
Description: declaration: module: java.desktop, package: javax.swing.plaf.basic, class: BasicComboBoxUI, class: FocusHandler
Keywords: javax.swing.plaf.basic.BasicComboBoxUI.FocusHandler class

Module java.desktop
Package javax.swing.plaf.basic

# Class BasicComboBoxUI.FocusHandler

java.lang.Object
javax.swing.plaf.basic.BasicComboBoxUI.FocusHandler

All Implemented Interfaces:
  `FocusListener`, `EventListener`

Enclosing class:
  `BasicComboBoxUI`

public class BasicComboBoxUI.FocusHandler extends Object implements FocusListener
This listener hides the popup when the focus is lost. It also repaints when focus is gained or lost. This public inner class should be treated as protected. Instantiate it only within subclasses of `BasicComboBoxUI`.

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `FocusHandler()`
  Constructs a `FocusHandler`.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `focusGained(FocusEvent e)`
  Invoked when a component gains the keyboard focus.
  `void`
  `focusLost(FocusEvent e)`
  Invoked when a component loses the keyboard focus.

  ### Methods declared in class java.lang.Object

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

- ## Constructor Details

  - ### FocusHandler

    public FocusHandler()
    Constructs a `FocusHandler`.

- ## Method Details

  - ### focusGained

    public void focusGained(FocusEvent e)
    Description copied from interface: `FocusListener`
    Invoked when a component gains the keyboard focus.
    Specified by:
      `focusGained` in interface `FocusListener`
    Parameters:
      `e` - the event to be processed

  - ### focusLost

    public void focusLost(FocusEvent e)
    Description copied from interface: `FocusListener`
    Invoked when a component loses the keyboard focus.
    Specified by:
      `focusLost` in interface `FocusListener`
    Parameters:
      `e` - the event to be processed