SimulationGUI.java

//This is the GUI simulation
// ChatGPT assisted me to code this GUI

import javax.swing.*;
import java.awt.*;
import java.util.*;

public class SimulationGUI extends JFrame {

    private final CampusRoute campusRoute;
    private final SimulationController controller;
    private final JPanel busPanel;
    
    private final JButton startButton;
    private final JButton stopButton;

    public SimulationGUI(CampusRoute campusRoute, SimulationController controller) {
        this.campusRoute = campusRoute;
        this.controller = controller;

        setTitle("Campus Bus Simulation");
        setSize(800, 600);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new BorderLayout());

        busPanel = new JPanel() {
            @Override
            protected void paintComponent(Graphics g) {
                super.paintComponent(g);
                drawStops(g);
                drawBuses(g);
            }
        };

        busPanel.setBackground(Color.WHITE);
        add(busPanel, BorderLayout.CENTER);
        
         // Buttons panel
        JPanel controlPanel = new JPanel();
        startButton = new JButton("STAR");
        stopButton = new JButton("STOP");

        startButton.addActionListener(e -> {
            controller.startSimulation();
            startButton.setEnabled(false);
            stopButton.setEnabled(true);
        });

        stopButton.addActionListener(e -> {
            controller.stopSimulation();
            startButton.setEnabled(true);
            stopButton.setEnabled(false);
        });
        stopButton.setEnabled(false);

        controlPanel.add(startButton);
        controlPanel.add(stopButton);

        add(controlPanel, BorderLayout.SOUTH);

        
        Timer timer = new Timer(33, e -> busPanel.repaint());
        timer.start();
    }

    private void drawStops(Graphics g) {
        List<Stop> stops = campusRoute.getStops();
        int numStops = stops.size();

        g.setColor(Color.BLUE);
        for (int i = 0; i < numStops; i++) {
            int[] coords = campusRoute.getStopCoordinates(i);
            int x = coords[0];
            int y = coords[1];
            g.fillOval(x - 10, y - 10, 20, 20);
            g.drawString("Stop " + i, x - 15, y - 15);
        }
    }

    private void drawBuses(Graphics g) {
        g.setColor(Color.RED);
        for (Bus bus : campusRoute.getBuses()) {
            int x = bus.getCurrentX();
            int y = bus.getCurrentY();
            g.fillRect(x - 10, y - 5, 20, 10);
            g.drawString("Bus " + bus.getBusId(), x - 15, y - 10);
        }
    }
}