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

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

Constructor Summary

BasicTreeUI.ComponentHandler ()

Method Summary

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

BasicTreeUI.ComponentHandler

public BasicTreeUI.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

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.

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