Restore

Labs/Lab12/Lab12_2230026071/Question2/src/Controller.java

@@ -0,0 +1,10 @@
+
+public class Controller{
+	//instance variable
+	protected Model m;
+	
+	//constructor
+	public Controller(Model m) {
+		this.m = m;
+	}
+}

Labs/Lab12/Lab12_2230026071/Question2/src/ControllerClicks.java

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+import java.awt.Point;
+
+public class ControllerClicks extends Controller{
+	//constructor
+	public ControllerClicks(Model m) {
+		super(m);
+	}
+	
+	//methods
+	public void mouseClicked(Point p) {
+		m.addPoint(p);
+	}
+	
+	public void resetClicked() {
+		m.clearAllPoints();
+	}
+	
+	public void undoClicked() {
+		m.deleteLastPoint();
+	}
+}

Labs/Lab12/Lab12_2230026071/Question2/src/Model.java

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+import java.awt.Point;
+import java.util.ArrayList;
+
+public class Model {
+	//instance variables
+	private ArrayList<Point> points;
+	private ArrayList<ModelListener> listeners;
+	
+	//constructor
+	public Model() {
+		points = new ArrayList<Point>();
+		listeners = new ArrayList<ModelListener>();
+	}
+	
+	//methods
+	public void addListener(ModelListener l) {
+		listeners.add(l);
+	}
+	
+	public ArrayList<Point> getPoints(){
+		return points;
+	}
+	
+	public void addPoint(Point p) {
+		points.add(p);
+		notifyListeners();
+	}
+	
+	public void clearAllPoints() {
+		points.clear();
+		notifyListeners();
+	}
+	
+	public void deleteLastPoint(){
+		if(points.size() > 0) {
+			points.remove(points.size() - 1);
+			notifyListeners();
+		}
+	}
+	
+	private void notifyListeners() {
+		for(ModelListener l: listeners) {
+			l.update();
+		}
+	}
+	
+	public int numberOfPoints() {
+		return points.size();
+	}
+	
+	//test
+	public static void testModel() {
+		
+	}
+}

Labs/Lab12/Lab12_2230026071/Question2/src/ModelListener.java

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+
+public interface ModelListener {
+	public void update();
+}

Labs/Lab12/Lab12_2230026071/Question2/src/MyFrame.java

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+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends View<ControllerClicks> {
+	public MyFrame(Model m, ControllerClicks c) {
+		super(m, c);
+		this.setTitle("MyFrame Title");
+		this.setSize(400, 300);
+		this.setLocationRelativeTo(null);
+		
+		this.setLayout(new BorderLayout());
+		MyPanel centerPanel = new MyPanel(m, c);
+		this.add(centerPanel, BorderLayout.CENTER);
+		JPanel topPanel = new JPanel();
+		this.add(topPanel, BorderLayout.PAGE_START);
+		topPanel.setLayout(new FlowLayout(FlowLayout.CENTER));
+		
+		JButton resetButton = new JButton("Reset");
+		resetButton.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				c.resetClicked();
+			}
+		});
+		topPanel.add(resetButton);
+		
+		JButton undoButton = new JButton("Undo");
+		undoButton.addActionListener(new ActionListener() {
+		@Override
+		public void actionPerformed(ActionEvent e) {
+				c.undoClicked();
+			}
+		});
+		topPanel.add(undoButton);
+		
+	}
+	
+	public void update() {
+		repaint();
+	}
+}

Labs/Lab12/Lab12_2230026071/Question2/src/MyPanel.java

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+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private Model m;
+	private ControllerClicks c;
+	
+	public MyPanel(Model m, ControllerClicks c) {
+		this.m = m;
+		this.c = c;
+		this.addMouseListener(new MouseAdapter() {
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					c.mouseClicked(e.getPoint());
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		if(m.getPoints().size() == 1) {
+			Point p = m.getPoints().get(0);
+			g.drawRect((int)p.getX(), (int)p.getY(), 1, 1);
+		}
+		else {
+			for(int i = 1; i < m.getPoints().size(); i++) {
+				Point start = m.getPoints().get(i - 1);
+				Point end = m.getPoints().get(i);
+				g.drawLine((int)start.getX(), (int)start.getY(),
+				(int)end.getX(), (int)end.getY());
+			}
+		}
+	}
+	
+}

Labs/Lab12/Lab12_2230026071/Question2/src/Start.java

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+public class Start {
+	public static void main(String[] args) {
+		javax.swing.SwingUtilities.invokeLater(new Runnable() {
+			@Override
+			public void run() {
+				Model m = new Model(); // Single shared model.
+				
+				ControllerClicks c1 = new ControllerClicks(m);
+				MyFrame v1 = new MyFrame(m, c1);
+
+				Controller c2 = new Controller(m);
+				ViewNumber v2 = new ViewNumber(m, c2);
+			}
+		});
+	}
+}

Labs/Lab12/Lab12_2230026071/Question2/src/Test.java

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+
+public class Test {
+
+	public static void main(String[] args) {
+		Model.testModel();
+	}
+
+}

Labs/Lab12/Lab12_2230026071/Question2/src/View.java

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+import javax.swing.JFrame;
+
+public abstract class View<T extends Controller> extends JFrame implements ModelListener{
+	//instance variables
+	protected Model m;
+	protected T c;
+	
+	//constructor
+	public View(Model m, T c) {
+		this.m = m;
+		this.c = c;
+		this.setLocationRelativeTo(null);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		m.addListener(this);
+		this.setVisible(true);
+	}
+	
+	@Override
+	public abstract void update();
+}

Labs/Lab12/Lab12_2230026071/Question2/src/ViewNumber.java

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+import javax.swing.JLabel;
+
+public class ViewNumber extends View<Controller>{
+	//instance variable
+	private JLabel label;
+	
+	public ViewNumber(Model m, Controller c) {
+		super(m, c);
+		this.setTitle("View Number");
+		this.setSize(200, 150);
+		label = new JLabel();
+		update();
+		this.add(label);
+	}
+
+	@Override
+	public void update() {
+		label.setText("Number of points is: " + m.numberOfPoints());
+	}
+
+}