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Class jovial.slotCar.animator.Animator

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Canvas
                   |
                   +----jovial.slotCar.animator.Animator

public class Animator

extends Canvas

implements Runnable

This class interacts with two others: Animatee, and Drawable. At start-up, it is configured with a number of drawables. It then enters a loop, where it tells the Animatee to move (by a time interval), then it draws its Drawables (in increasing order of height, so that overlapping works).

As a concession to efficiency, we adopted the convention that Drawables with a height <= 0 won't be re-drawn in each successive frame. Think of them as a "background" image. In addition, Drawables that canMove() are asked to erase() themselves after each frame. If these restrictions are too much, you can always make sure all your Drawables have a height >= 1, and maybe make your lowest Drawable be a rectangle that erases the entire screen.

Use:

	Animator a = new Animator(myAnimatee);
	new Thread(a).start();
 

See Also:

Animatee, Drawable

Animator()

Initialize a new animator.

addDrawable(Drawable)

Add to the list of things that we draw

init(Animatee)

Initialize us with an animatee.

paint(Graphics)

Paint this canvas

preferredSize()

Give our preferred size

run()

Cause this animator to start running.

  public Animator()

Initialize a new animator. Be sure to call init() with the animatee later!

  public void init(Animatee a)

Initialize us with an animatee. Should be called from the Animatee's constructor.

Parameters:

a - What we are to animate

  public void paint(Graphics g)

Paint this canvas

Overrides:

paint in class Canvas

  public Dimension preferredSize()

Give our preferred size

Returns:

the size

Overrides:

preferredSize in class Component

  public void addDrawable(Drawable d)

Add to the list of things that we draw

Parameters:

d - The new drawable

  public void run()

Cause this animator to start running.

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