org.htmlparser.lexerapplications.thumbelina

Class Sequencer


public class Sequencer
extends Thread

Display received images at a constant rate.

Field Summary

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

Constructor Summary

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

Method Summary

void
add(Image image, URL url)
Add an image to the pending list.
void
add(Image image, URL url, 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.

Field Details

DEFAULT_DELAY

protected static final int DEFAULT_DELAY
The default delay time, milliseconds.
Field Value:
500

mActive

protected boolean mActive
Activity state. true means fetching and displaying, false not.

mDelay

protected int mDelay
Delay between picture displays.

mPending

protected ArrayList mPending
Pictures awaiting display.

mRandom

protected Random mRandom
Random number generator for picture placement.

mThumbelina

protected Thumbelina mThumbelina
The thumbelina object to drive.

Constructor Details

Sequencer

public Sequencer(Thumbelina thumbelina)
Creates a new instance of a Sequencer.
Parameters:
thumbelina - The object to push images to.

Method Details

add

public void add(Image image,
                URL url)
Add an image to the pending list.
Parameters:
image - The image to add.
url - The url the image came from.

add

public void add(Image image,
                URL url,
                boolean background)
Add an image to the panel.
Parameters:
image - The image to add.
url - The url the image came from.
background - If true, just add to pending list.

getDelay

public int getDelay()
Getter for property delay.
Returns:
Value of property delay.

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.

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.

reset

public void reset()
Clears the pending images 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.

setDelay

public void setDelay(int delay)
Setter for property delay.
Parameters:
delay - New value of property delay.

HTML Parser is an open source library released under LGPL. SourceForge.net