game
Class PieceViz

java.lang.Object
  game.PieceViz

All Implemented Interfaces:

Subscriber<PieceEvent>

Direct Known Subclasses:

CircViz, RectViz

public abstract class PieceViz
extends java.lang.Object
implements Subscriber<PieceEvent>

This class is responsible for displaying graphics associated with game pieces in the graphics panel. The separation of the piece's behavior from its visual representation keeps each part simpler and makes things more flexible.

Author:

Ron Cytron, with some changes by Jon Turner

Field Summary

protected nip.GraphicsPanel	panel
protected Piece	piece

Constructor Summary

PieceViz(Piece piece, java.awt.Color c, nip.GraphicsPanel panel)

Method Summary

boolean	isDead() Subscribers must be able to say when they are still alive or are dead.
protected abstract nip.Graphic	newGraphic() Implemented by subclasses to provide a new graphic that represents the piece.
protected abstract boolean	newSize() Implemented by subclasses to report whenever the piece changes in size.
void	observeEvent(PieceEvent pe) Called whenever the Piece position or status changes and updates the graphic accordingly.
protected void	setGraphic(nip.Graphic graphic) Set the Shape for this visualization of a Piece.

Methods inherited from class java.lang.Object

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

Field Detail

panel

protected final nip.GraphicsPanel panel

piece

protected final Piece piece

Constructor Detail

PieceViz

public PieceViz(Piece piece,
                java.awt.Color c,
                nip.GraphicsPanel panel)

Method Detail

setGraphic

protected void setGraphic(nip.Graphic graphic)

Set the Shape for this visualization of a Piece. Can be changed as the program runs. This is used mainly to change the size of a piece as the game progresses.

Parameters:

graphic - is the new graphic to be used to represent the piece.

newSize

protected abstract boolean newSize()

Implemented by subclasses to report whenever the piece changes in size.

Returns:

true if the piece size has just changed

newGraphic

protected abstract nip.Graphic newGraphic()

Implemented by subclasses to provide a new graphic that represents the piece. Used to replace a piece which has changed in size.

Returns:

the new graphic

observeEvent

public void observeEvent(PieceEvent pe)

Called whenever the Piece position or status changes and updates the graphic accordingly.

Specified by:

observeEvent in interface Subscriber<PieceEvent>

Parameters:

pe - is the event associated with the piece

isDead

public boolean isDead()

Description copied from interface: Subscriber

Subscribers must be able to say when they are still alive or are dead.

Specified by:

isDead in interface Subscriber<PieceEvent>

Returns:

true if this Subscriber is no longer interested in receiving notifications of events from its Publisher.