make ElevatorCanvas reflect the state of the Elevator

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);
     }