import objectdraw.*;

import java.awt.*;


public class FallingLeaf extends ActiveObject {
    
    private static final int DELAY_TIME = 33; // delay between leaf motions
    
    // lowest point in window
    private int screenHeight; 
    
    // speed of fall
    private double yspeed; 

    // the leaf
    private VisibleImage leaf; 

    // construct leaf and put at top of screen at x from left
    public FallingLeaf(DrawingCanvas canvas, Image leafpic, double x,
                       double speed, int aScreenHeight) {
                           
        leaf = new VisibleImage(leafpic, 0, 0, canvas);
        leaf.move(x, -leaf.getHeight());

        yspeed = speed;
        screenHeight = aScreenHeight;

        this.start();
    }

    // Leaf falls to ground
    public void run() {
        
        while (leaf.getY() < screenHeight) {
            pause(DELAY_TIME);
            leaf.move(0, yspeed);
        }

        leaf.removeFromCanvas();
    }
}