ballworld.model.paint

Class APaintStrategy

java.lang.Object

ballworld.model.paint.APaintStrategy

All Implemented Interfaces:

IPaintStrategy

Direct Known Subclasses:

ADecoratorPaintStrategy, AnimatePaintStrategy, ImagePaintStrategy, MultiPaintStrategy, ShapePaintStrategy

public abstract class APaintStrategy
extends java.lang.Object
implements IPaintStrategy

The top-level affine transform-based paint strategy that provides services for its subclasses, plus default behaviors and abstract behaviors.

Field Summary

Fields

Modifier and Type	Field and Description
private java.awt.geom.AffineTransform	at The affine transform used by this paint strategy to translate, scale and rotate the image.

Fields inherited from interface ballworld.model.IPaintStrategy

NullObject

Constructor Summary

Constructors

Constructor and Description
APaintStrategy(java.awt.geom.AffineTransform at) Constructor that initializes the strategy with an affine transform

Method Summary

Modifier and Type	Method and Description
protected java.awt.geom.AffineTransform	getAT() Protected accessor for the internal affine transform
void	init(Ball context) By default, do nothing for initialization.
void	paint(java.awt.Graphics g, Ball host) Paints on the given graphics context using the color, scale and direction provided by the host.
protected void	paintCfg(java.awt.Graphics g, Ball host) Used for doing additional configurations by a subclass.
abstract void	paintXfrm(java.awt.Graphics g, Ball host, java.awt.geom.AffineTransform at) Paints the host onto the given Graphics context.

Methods inherited from class java.lang.Object

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

Field Detail

at

private java.awt.geom.AffineTransform at

The affine transform used by this paint strategy to translate, scale and rotate the image.

Constructor Detail

APaintStrategy

public APaintStrategy(java.awt.geom.AffineTransform at)

Constructor that initializes the strategy with an affine transform

Parameters:

at - The AffineTransform for this paint strategy to use.

Method Detail

getAT

protected java.awt.geom.AffineTransform getAT()

Protected accessor for the internal affine transform

Returns:

This instance's affine transform

paint

public void paint(java.awt.Graphics g,
                  Ball host)

Paints on the given graphics context using the color, scale and direction provided by the host. This is done by setting up the AffineTransform to rotate then scale then translate. Calls paintXfrm to actually perform the painting, using the set up transform. Calls paintCfg just before calling paintXfrm

Specified by:

paint in interface IPaintStrategy

Parameters:

g - The Graphics context that will be paint on

host - The host Ball that the required information will be pulled from.

init

public void init(Ball context)

By default, do nothing for initialization.

Specified by:

init in interface IPaintStrategy

Parameters:

context - The ball to initialize.

paintCfg

protected void paintCfg(java.awt.Graphics g,
                        Ball host)

Used for doing additional configurations by a subclass. The translation, rotation and scaling transformations have already been applied to this object's AffineTransform instance. This method is called before the paint method's final delegation to paintXfrm. This method is designed to be overridden by the subclass. By default the behavior is a no-op.

Parameters:

g - The Graphics context that will be drawn upon.

host - The Ball to be painted.

paintXfrm

public abstract void paintXfrm(java.awt.Graphics g,
                               Ball host,
                               java.awt.geom.AffineTransform at)

Paints the host onto the given Graphics context. The image is translated, scaled and rotated as determined by the given affine transformation. This method is intended to be called either by a class's (or superclass's) own paint method or by another paint strategy who is sharing the affine transform. This allows the same transformation to be shared amongst multiple paint strategies.

Parameters:

g - The graphics context to draw upon.

host - The host ball.

at - The affine transform to use.