source: last-defense/gamegui/Animation.java

package gamegui;

import java.awt.Graphics;
import utils.DynamicImage;
import java.util.ArrayList;

public class Animation extends Member {
    public ArrayList<DynamicImage> frames;
    int currentFrame;
    public int drawInterval;
    long lastFrameChange;
    boolean reachedEnd;
    public boolean wrap;
    
    public Animation(final String newName, final int newX, final int newY, final int newWidth, final int newHeight, final int newInterval, final boolean wrap) {
        super(newName, newX, newY, newWidth, newHeight);
        this.frames = new ArrayList<DynamicImage>();
        this.currentFrame = 0;
        this.drawInterval = newInterval;
        this.lastFrameChange = 0L;
        this.reachedEnd = false;
        this.wrap = wrap;
    }
    
    public Animation(final Animation copy) {
        super(copy.getName(), copy.getX(), copy.getY(), copy.getWidth(), copy.getHeight());
        this.frames = copy.frames;
        this.currentFrame = copy.currentFrame;
        this.drawInterval = copy.drawInterval;
        this.lastFrameChange = 0L;
        this.reachedEnd = false;
        this.wrap = copy.wrap;
    }
    
    public int getCurrentFrame() {
        return this.currentFrame;
    }
    
    public void addFrame(final DynamicImage newFrame) {
        this.frames.add(newFrame);
    }
    
    @Override
    public void draw(final Graphics g) {
        if (this.lastFrameChange == 0L) {
            this.lastFrameChange = System.nanoTime();
        }
        if (System.nanoTime() - this.lastFrameChange > this.drawInterval * 1000000) {
            ++this.currentFrame;
            if (this.currentFrame >= this.frames.size()) {
                if (this.wrap) {
                    this.currentFrame = 0;
                }
                else {
                    --this.currentFrame;
                }
                this.reachedEnd = true;
            }
            this.lastFrameChange = System.nanoTime();
        }
        this.frames.get(this.currentFrame).draw(g, this.getX(), this.getY());
    }
    
    public void draw(final Graphics g, final int x, final int y) {
        if (this.lastFrameChange == 0L) {
            this.lastFrameChange = System.nanoTime();
        }
        if (System.nanoTime() - this.lastFrameChange > this.drawInterval * 1000000) {
            ++this.currentFrame;
            if (this.currentFrame >= this.frames.size()) {
                if (this.wrap) {
                    this.currentFrame = 0;
                }
                else {
                    --this.currentFrame;
                }
                this.reachedEnd = true;
            }
            this.lastFrameChange = System.nanoTime();
        }
        this.frames.get(this.currentFrame).draw(g, this.getX() + x - this.frames.get(this.currentFrame).getWidth() / 2, this.getY() + y - this.frames.get(this.currentFrame).getHeight());
    }
    
    public boolean reachedEnd() {
        return this.reachedEnd;
    }
    
    public void reset() {
        this.reachedEnd = false;
        this.currentFrame = 0;
        this.lastFrameChange = 0L;
    }
}