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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

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

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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/javax/swing/plaf/basic/BasicComboBoxUI.FocusHandler.html