net.sourceforge.jsh3modtool.gui.imagetable.cache
Class ThumbnailLoader

java.lang.Object
  java.lang.Thread
      net.sourceforge.jsh3modtool.gui.imagetable.cache.ThumbnailLoader

All Implemented Interfaces:

java.lang.Runnable

public class ThumbnailLoader
extends java.lang.Thread

Thread to load thumbnails. To lessen the load of the thread that reads/creates ImageBoxes Singleton behaviour

Author:

erma

Nested Class Summary

protected class

ThumbnailLoader.ThumbnailQueueItem A queue item that contains a viewer and a image properties object.

Nested classes/interfaces inherited from class java.lang.Thread

java.lang.Thread.State, java.lang.Thread.UncaughtExceptionHandler

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

protected

ThumbnailLoader() Creates a thumbnail loader.

Method Summary

void	add(ImageModel imageProps, ThumbnailViewer viewer) Add an ImageProperties and a ThumbnailViewer to the queue.
void	addFirst(ImageModel imageProps, ThumbnailViewer viewer) Add an ImageProperties and a ThumbnailViewer to the the begining of the queue.
void	clear() Removes all ThumbnailViewers from the queue
boolean	contains(ImageModel imageProps) Returns true if the queue contains the specified object.
void	increasePriority(ImageModel imageProps) Increase the priority of the specified item.
void	increasePriority(ThumbnailViewer viewer) Increase the priority of the specified item
static ThumbnailLoader	instance() Returns the singleton instance of this class.
int	queueSize() Returns the size of the queue.
void	remove(ImageModel imageProps) Removes the specified object from the queue.
void	remove(ThumbnailViewer viewer) Removes the specified object from the queue.
void	removeFirst() Removes the first queue item.
void	removeLast() Removes the last queue item.
void	run() Thread run method, waits for items on the queue, removes it and reads the thumbnail for it and returns it to the listener
void	startLoading() Starts the Thumbnail loading thread (if it hasnt been started
void	stopLoading() Stops the Thumbnail loading thread, does not wait until the thread is dead

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Constructor Detail

ThumbnailLoader

protected ThumbnailLoader()

Creates a thumbnail loader.

Method Detail

instance

public static ThumbnailLoader instance()

Returns the singleton instance of this class.

Returns:

the singleton instance.

run

public void run()

Thread run method, waits for items on the queue, removes it and reads the thumbnail for it and returns it to the listener

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread

startLoading

public void startLoading()

Starts the Thumbnail loading thread (if it hasnt been started

stopLoading

public void stopLoading()

Stops the Thumbnail loading thread, does not wait until the thread is dead

clear

public void clear()

Removes all ThumbnailViewers from the queue

add

public void add(ImageModel imageProps,
                ThumbnailViewer viewer)

Add an ImageProperties and a ThumbnailViewer to the queue.

Parameters:

imageProps - the image props.

viewer - the viewer.

addFirst

public void addFirst(ImageModel imageProps,
                     ThumbnailViewer viewer)

Add an ImageProperties and a ThumbnailViewer to the the begining of the queue.

Parameters:

imageProps - the image props.

viewer - the viewer.

removeFirst

public void removeFirst()

Removes the first queue item.

removeLast

public void removeLast()

Removes the last queue item.

increasePriority

public void increasePriority(ThumbnailViewer viewer)

Increase the priority of the specified item

Parameters:

viewer - the thumbnail viewer object to raise the priority for.

increasePriority

public void increasePriority(ImageModel imageProps)

Increase the priority of the specified item.

Parameters:

imageProps - the image properties object to raise the priority for.

contains

public boolean contains(ImageModel imageProps)

Returns true if the queue contains the specified object.

Parameters:

imageProps - the image properties to find.

Returns:

true if the queue contains the specified object.

queueSize

public int queueSize()

Returns the size of the queue. Note there may be one in the image handling method.

Returns:

the size of the queue.

remove

public void remove(ThumbnailViewer viewer)

Removes the specified object from the queue.

Parameters:

viewer - the thumbnail viewer.

remove

public void remove(ImageModel imageProps)

Removes the specified object from the queue.

Parameters:

imageProps - the image properties to remove.