org.htmlparser.lexerapplications.thumbelina
Class Sequencer

java.lang.Object
  java.lang.Thread
      org.htmlparser.lexerapplications.thumbelina.Sequencer

All Implemented Interfaces:

Runnable

public class Sequencer
extends Thread

Display received images at a constant rate.

Nested Class Summary

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

Thread.State, Thread.UncaughtExceptionHandler

Field Summary

protected static int	DEFAULT_DELAY The default delay time, 500 milliseconds.
protected boolean	mActive Activity state.
protected int	mDelay Delay between picture displays.
protected ArrayList<Picture>	mPending Pictures awaiting display.
protected Random	mRandom Random number generator for picture placement.
protected Thumbelina	mThumbelina The thumbelina object to drive.

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Sequencer(Thumbelina thumbelina)
Creates a new instance of a Sequencer.

Method Summary

void	add(Picture picture, boolean background) Add an image to the panel.
int	getDelay() Getter for property delay.
protected void	place(Picture picture, boolean add) Place a picture in the display area.
protected Point	random(String url, int width, int height) Compute a random point to load the image.
void	reset() Clears the pending images list.
void	run() Display pictures from pending list with delay between.
void	setDelay(int delay) Setter for property delay.

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

Field Detail

DEFAULT_DELAY

protected static final int DEFAULT_DELAY

The default delay time, 500 milliseconds.

See Also:

Constant Field Values

mThumbelina

protected Thumbelina mThumbelina

The thumbelina object to drive.

mPending

protected ArrayList<Picture> mPending

Pictures awaiting display.

mActive

protected boolean mActive

Activity state. true means fetching and displaying, false not.

mDelay

protected int mDelay

Delay between picture displays.

mRandom

protected Random mRandom

Random number generator for picture placement.

Constructor Detail

Sequencer

public Sequencer(Thumbelina thumbelina)

Creates a new instance of a Sequencer.

Parameters:

thumbelina - The object to push images to.

Method Detail

reset

public void reset()

Clears the pending images list.

random

protected Point random(String url,
                       int width,
                       int height)

Compute a random point to load the image. Generate a random point for one of the corners of the image and then condition the numbers so the image is on screen.

Parameters:

url - The url this picture was fetched from. Used in computing the random position, so the picture is always placed in the same location, even when refetched.

width - The width of the image.

height - The height of the image.

Returns:

The random point to use.

place

protected void place(Picture picture,
                     boolean add)

Place a picture in the display area. Places the picture at a random location on screen.

Parameters:

picture - The picture to place on screen.

add - If true, the picture is added to the history.

add

public void add(Picture picture,
                boolean background)

Add an image to the panel.

Parameters:

picture - The picture to add.

background - If true, just add to pending list.

run

public void run()

Display pictures from pending list with delay between. If the list is empty it waits on the pending list for new pictures.

Specified by:

run in interface Runnable

Overrides:

run in class Thread

getDelay

public int getDelay()

Getter for property delay.

Returns:

Value of property delay.

setDelay

public void setDelay(int delay)

Setter for property delay.

Parameters:

delay - New value of property delay.