a6

assignment6/Question3/Model.java

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+import java.awt.Graphics;
+import java.util.ArrayList;
+
+public class Model {
+	// instance variables
+	private int score;
+	private ArrayList<IShape> bubbles;
+
+	// constructor
+	public Model() {
+		score = 0;
+		bubbles = new ArrayList<IShape>();
+	}
+
+	// getters and setters
+	public int getScore() {
+		return score;
+	}
+
+	/**
+	 * @param w
+	 * @param h
+	 */
+	public void addBubble(int w, int h) {
+		bubbles.add(new Bubble((int) (w * Math.random()), (int) (h * Math.random())));
+	}
+
+	/**
+	 * @param dx
+	 * @param dy
+	 */
+	public void moveAll(int dx, int dy) {
+		for (int i = 0; i < bubbles.size(); i++) {
+			bubbles.get(i).setX(bubbles.get(i).getX() + dx);
+			bubbles.get(i).setY(bubbles.get(i).getY() + dy);
+		}
+	}
+
+	/**
+	 * clear all bubbles
+	 * 
+	 * @param w
+	 * @param h
+	 */
+	public void clearInvisibles(int w, int h) {
+		for (int i = bubbles.size() - 1; i >= 0; i--) {
+			if (!bubbles.get(i).isVisible(w, h)) {
+				bubbles.remove(i);
+				score--;
+			}
+		}
+	}
+
+	/**
+	 * delete bubbles that are hit by the mouse
+	 * 
+	 * @param x
+	 * @param y
+	 */
+	public void deleteBubblesAtPoint(int x, int y) {
+		for (int i = bubbles.size() - 1; i >= 0; i--) {
+			if (bubbles.get(i).isIn(x, y)) {
+				bubbles.remove(i);
+				score++;
+			}
+		}
+	}
+
+	/**
+	 * draw all bubbles
+	 *
+	 * @param g
+	 */
+	public void drawAll(Graphics g) {
+		for (IShape bubble : bubbles) {
+			bubble.draw(g);
+		}
+	}
+
+	public static void testModel() {
+		Model m = new Model();
+		System.out.println(m.getScore() == 0);
+		System.out.println(m.bubbles.size() == 0);
+		m.addBubble(100, 100);
+		m.addBubble(100, 100);
+		System.out.println(m.getScore() == 0);
+		System.out.println(m.bubbles.size() == 2);
+		m.clearInvisibles(200, 200);
+		System.out.println(m.getScore() == 0);
+		System.out.println(m.bubbles.size() == 2);
+		m.clearInvisibles(0, 0);
+		System.out.println(m.getScore() == -2);
+		System.out.println(m.bubbles.size() == 0);
+		m.addBubble(100, 100);
+		m.addBubble(100, 100);
+		System.out.println(m.getScore() == -2);
+		System.out.println(m.bubbles.size() == 2);
+		m.moveAll(200, 200);
+		System.out.println(m.getScore() == -2);
+		System.out.println(m.bubbles.size() == 2);
+		m.clearInvisibles(200, 200);
+		System.out.println(m.getScore() == -4);
+		System.out.println(m.bubbles.size() == 0);
+	}
+}