Class BasicTreeUI.ComponentHandler

java.lang.Object
- java.awt.event.ComponentAdapter
- - javax.swing.plaf.basic.BasicTreeUI.ComponentHandler

All Implemented Interfaces:: ActionListener, ComponentListener, EventListener

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.

Constructors
Constructor	Description
`ComponentHandler()`

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`actionPerformed(ActionEvent ae)`	Public as a result of Timer.
`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.

componentHidden, componentMoved, componentResized, componentShown

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

protected Timer timer

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

protected JScrollBar scrollBar

ScrollBar that is being adjusted.

public ComponentHandler()

protected void startTimer()

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

protected JScrollPane getScrollPane()

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

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.