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()	Constructs a ComponentHandler.

Method Summary

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.

Methods declared in class ComponentAdapter

componentHidden, componentMoved, componentResized, componentShown

Modifier and Type	Method	Description
void	componentHidden(ComponentEvent e)	Invoked when the component has been made invisible.
void	componentMoved(ComponentEvent e)	Invoked when the component's position changes.
void	componentResized(ComponentEvent e)	Invoked when the component's size changes.
void	componentShown(ComponentEvent e)	Invoked when the component has been made visible.

Methods declared in class Object

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

Modifier and Type	Method	Description
protected Object	clone()	Creates and returns a copy of this object.
boolean	equals(Object obj)	Indicates whether some other object is "equal to" this one.
protected void	finalize()	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
final Class<?>	getClass()	Returns the runtime class of this Object.
int	hashCode()	Returns a hash code value for this object.
final void	notify()	Wakes up a single thread that is waiting on this object's monitor.
final void	notifyAll()	Wakes up all threads that are waiting on this object's monitor.
String	toString()	Returns a string representation of the object.
final void	wait()	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
final void	wait(long timeoutMillis)	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
final void	wait(long timeoutMillis, int nanos)	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

Field Details

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 Details

ComponentHandler

public ComponentHandler()

Constructs a ComponentHandler.

Method Details

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