javax.swing.plaf.basic

Class BasicTreeUI.ComponentHandler

java.lang.Object

java.awt.event.ComponentAdapter

javax.swing.plaf.basic.BasicTreeUI.ComponentHandler

All Implemented Interfaces:

java.awt.event.ActionListener, java.awt.event.ComponentListener, java.util.EventListener

Enclosing class:

BasicTreeUI

public class BasicTreeUI.ComponentHandler
extends java.awt.event.ComponentAdapter
implements java.awt.event.ActionListener

Updates the preferred size when scrolling, if necessary.

Field Summary

Fields

Modifier and Type	Field and Description
protected javax.swing.JScrollBar	scrollBar ScrollBar that is being adjusted
protected javax.swing.Timer	timer Timer used when inside a scrollpane and the scrollbar is adjusting

Constructor Summary

Constructors

Constructor and Description
BasicTreeUI.ComponentHandler() Constructor

Method Summary

Methods

Modifier and Type	Method and Description
void	actionPerformed(java.awt.event.ActionEvent ae) Public as a result of Timer.
void	componentMoved(java.awt.event.ComponentEvent e) Invoked when the component's position changes.
protected javax.swing.JScrollPane	getScrollPane() Returns the JScrollPane housing the JTree, or null if one isn't found.
protected void	startTimer() Creates, if necessary, and starts a Timer to check if needed to resize the bounds

Methods inherited from class java.awt.event.ComponentAdapter

componentHidden, componentResized, componentShown

Methods inherited from class java.lang.Object

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

Field Detail

timer

protected javax.swing.Timer timer

Timer used when inside a scrollpane and the scrollbar is adjusting

scrollBar

protected javax.swing.JScrollBar scrollBar

ScrollBar that is being adjusted

Constructor Detail

BasicTreeUI.ComponentHandler

public BasicTreeUI.ComponentHandler()

Constructor

Method Detail

componentMoved

public void componentMoved(java.awt.event.ComponentEvent e)

Invoked when the component's position changes.

Specified by:

componentMoved in interface java.awt.event.ComponentListener

Overrides:

componentMoved in class java.awt.event.ComponentAdapter

Parameters:

e - the event that occurs when moving the component

startTimer

protected void startTimer()

Creates, if necessary, and starts a Timer to check if needed to resize the bounds

getScrollPane

protected javax.swing.JScrollPane getScrollPane()

Returns the JScrollPane housing the JTree, or null if one isn't found.

Returns:

JScrollPane housing the JTree, or null if one isn't found.

actionPerformed

public void actionPerformed(java.awt.event.ActionEvent ae)

Public as a result of Timer. If the scrollBar is null, or not adjusting, this stops the timer and updates the sizing.

Specified by:

actionPerformed in interface java.awt.event.ActionListener

Parameters:

ae - is the action performed