source: winedb/src/gamegui/Animation.java

package gamegui;

import java.awt.*;
import java.util.*;

import utils.*;

public class Animation extends Member
{
        public ArrayList<DynamicImage> frames;
        int currentFrame;
        public int drawInterval;
        long lastFrameChange;
        boolean reachedEnd;     //set to true if the animation has gone through one complete cycle
        public boolean wrap;    //if true, cycles through the animation. If false, keeps showing the last frame once the others
                                                        //are shown
        
        public Animation(String newName, int newX, int newY, int newWidth, int newHeight, int newInterval, boolean wrap)
        {
                super(newName, newX, newY, newWidth, newHeight);
                
                frames = new ArrayList<DynamicImage>();
                currentFrame = 0;
                drawInterval = newInterval;
                lastFrameChange = 0;
                reachedEnd = false;
                this.wrap = wrap;
        }
        
        public Animation(Animation copy) {
                super(copy.getName(), copy.getX(), copy.getY(), copy.getWidth(), copy.getHeight());
                frames = copy.frames;
                currentFrame = copy.currentFrame;
                drawInterval = copy.drawInterval;
                lastFrameChange = 0;
                reachedEnd = false;
                wrap = copy.wrap;
        }
        
        public int getCurrentFrame() {
                return currentFrame;
        }
        
        public void addFrame(DynamicImage newFrame)
        {
                frames.add(newFrame);
        }
        
        public void draw(Graphics g)
        {
                if(lastFrameChange == 0)
                        lastFrameChange = System.nanoTime();
                
                if(System.nanoTime() - lastFrameChange > drawInterval*1000000)
                {
                        currentFrame++;
                        if(currentFrame >= frames.size()) {
                                if(wrap)
                                        currentFrame = 0;
                                else
                                        currentFrame--;
                                reachedEnd = true;
                        }
                        
                        lastFrameChange = System.nanoTime();
                }
                
        frames.get(currentFrame).draw(g, getX(), getY());
        }
        
        public void draw(Graphics g, int x, int y)      {
                if(lastFrameChange == 0)
                        lastFrameChange = System.nanoTime();
                
                if((System.nanoTime() - lastFrameChange) > drawInterval*1000000)
                {
                        currentFrame++;
                        if(currentFrame >= frames.size()) {
                                if(wrap)
                                        currentFrame = 0;
                                else
                                        currentFrame--;
                                reachedEnd = true;
                        }
                        
                        lastFrameChange = System.nanoTime();
                }
                
        frames.get(currentFrame).draw(g, getX()+x-frames.get(currentFrame).getWidth()/2, getY()+y-frames.get(currentFrame).getHeight());
        }
        
        public boolean reachedEnd() {
                return reachedEnd;
        }
        
        public void reset() {
                reachedEnd = false;
                currentFrame = 0;
                lastFrameChange = 0;
        }
}