Module java.desktop

Package javax.swing.plaf.basic

Class BasicTreeUI.ComponentHandler

java.lang.Object

java.awt.event.ComponentAdapter

javax.swing.plaf.basic.BasicTreeUI.ComponentHandler

All Implemented Interfaces:

ActionListener, ComponentListener, EventListener

Enclosing class:

BasicTreeUI

public class BasicTreeUI.ComponentHandler
extends ComponentAdapter
implements ActionListener

Updates the preferred size when scrolling (if necessary).

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor	Description
ComponentHandler()

Method Summary

Modifier and Type	Method	Description
void	actionPerformed(ActionEvent ae)	Public as a result of Timer.
void	componentMoved(ComponentEvent e)	Invoked when the component's position changes.
protected 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 need 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 Timer timer

Timer used when inside a scrollpane and the scrollbar is adjusting.

scrollBar

protected JScrollBar scrollBar

ScrollBar that is being adjusted.

Constructor Detail

ComponentHandler

public ComponentHandler()

Method Detail

componentMoved

public void componentMoved(ComponentEvent e)

Description copied from class: ComponentAdapter

Invoked when the component's position changes.

Specified by:

componentMoved in interface ComponentListener

Overrides:

componentMoved in class ComponentAdapter

Parameters:

e - the event to be processed

startTimer

protected void startTimer()

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

getScrollPane

protected JScrollPane getScrollPane()

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

Returns:

the JScrollPane housing the JTree

actionPerformed

public void actionPerformed(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 ActionListener

Parameters:

ae - the event to be processed