make ElevatorCanvas reflect the state of the Elevator

src/gui/ElevatorApplication.java

@@ -1,11 +1,25 @@
 package gui;
+
 import javax.swing.*;
 import java.awt.*;
 import java.awt.event.*;
 
+import Requests.CallFromElevatorRequest;
+import Requests.CallFromFloorRequest;
+import simulation.Elevator;
+import simulation.Simulation;
+
 
 public class ElevatorApplication implements ActionListener {
     private ElevatorCanvas canvas;
+	private Simulation simulation;
+	private Elevator elevator;
+
+	public ElevatorApplication() {
+		elevator = new Elevator(0, 5);
+		simulation = new Simulation(elevator);
+		elevator.setActionListener(simulation);
+	}
 
     @Override
     public void actionPerformed(ActionEvent e) {
@@ -21,7 +35,7 @@ public class ElevatorApplication implements ActionListener {
 
 		pane.add(Box.createHorizontalGlue());
 
-		canvas = new ElevatorCanvas();
+		canvas = new ElevatorCanvas(elevator);
 		canvas.setAlignmentY(Component.TOP_ALIGNMENT);
 		pane.add(canvas);
 
@@ -43,6 +57,7 @@ public class ElevatorApplication implements ActionListener {
 
     public static void main(String[] args) {
 		ElevatorApplication app = new ElevatorApplication();
+
 		SwingUtilities.invokeLater(new Runnable() {
 				public void run() {
 					app.createAndShowGUI();

src/gui/ElevatorCanvas.java

@@ -1,15 +1,22 @@
 package gui;
 import javax.swing.*;
 import java.awt.*;
+import simulation.Elevator;
+import commandSystem.Direction;
 
 
+@SuppressWarnings("serial")
 class ElevatorCanvas extends JPanel {
 	private final static int WIDTH = 40;
 	private final static int HEIGHT = 50;
-	private final static Color COLOR = Color.PINK;
 	private final static Dimension DIMENSIONS = new Dimension(WIDTH, 200);
 
     private int y = 0;
+	private Elevator elevator;
+
+	public ElevatorCanvas(Elevator elevator) {
+		this.elevator = elevator;
+	}
 
     @Override
     public Dimension getMinimumSize() {
@@ -27,7 +34,18 @@ class ElevatorCanvas extends JPanel {
     @Override
     public void paintComponent(Graphics g) {
 		super.paintComponent(g);
-		g.setColor(COLOR);
+		if (elevator.getStoppingNextFloor()) {
+			g.setColor(Color.BLUE);
+		}
+		else if (elevator.getDirection() == Direction.NONE) {
+			g.setColor(Color.GRAY);
+		}
+		else if (elevator.getEmergency()) {
+			g.setColor(Color.RED);
+		}
+		else {
+			g.setColor(Color.BLACK);
+		}
 		g.fillRect(0, y, WIDTH, HEIGHT);
     }