de.lmu.ifi.dbs.elki.visualization.svg

Class UpdateRunner

java.lang.Object

de.lmu.ifi.dbs.elki.visualization.svg.UpdateRunner

public class UpdateRunner
extends Object

Class to handle updates to an SVG plot, in particular when used in an Apache Batik UI.

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
private ConcurrentLinkedQueue<Runnable>	queue The queue of pending updates
private Object	sync Owner/Synchronization object
private UpdateSynchronizer	synchronizer Synchronizer that can block events from being executed right away.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	UpdateRunner(Object sync) Construct a new update handler

Method Summary

Methods

Modifier and Type	Method and Description
void	clear() Clear queue.
void	invokeLater(Runnable r) Add a new update to run at any appropriate time.
boolean	isEmpty() Check whether the queue is empty.
void	runQueue() Run the processing queue now.
void	synchronizeWith(UpdateSynchronizer newsync) Set a new update synchronizer.
void	unsynchronizeWith(UpdateSynchronizer oldsync) Remove an update synchronizer

Methods inherited from class java.lang.Object

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

Field Detail

sync

private Object sync

Owner/Synchronization object

queue

private final ConcurrentLinkedQueue<Runnable> queue

The queue of pending updates

synchronizer

private UpdateSynchronizer synchronizer

Synchronizer that can block events from being executed right away.

Constructor Detail

UpdateRunner

protected UpdateRunner(Object sync)

Construct a new update handler

Parameters:

sync - Object to synchronize on

Method Detail

invokeLater

public void invokeLater(Runnable r)

Add a new update to run at any appropriate time.

Parameters:

r - New runnable to perform the update

runQueue

public void runQueue()

Run the processing queue now. This should usually be only invoked by the UpdateSynchronizer

clear

public void clear()

Clear queue. For shutdown!

isEmpty

public boolean isEmpty()

Check whether the queue is empty.

Returns:

queue status

synchronizeWith

public void synchronizeWith(UpdateSynchronizer newsync)

Set a new update synchronizer.

Parameters:

newsync - Update synchronizer

unsynchronizeWith

public void unsynchronizeWith(UpdateSynchronizer oldsync)

Remove an update synchronizer

Parameters:

oldsync - Update synchronizer to remove