gui

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

public class gui extends JFrame{

    private JLabel info;
    private JButton start, stop;
    private JProgressBar progressBar;

    public gui() {
        //create an object of EventHandler
        EventHandler listener = new EventHandler();
        EventHandler2 listener2 = new EventHandler2();

        start = new JButton("Start download");
        start.addActionListener(listener);

        stop = new JButton("Stop Download");
        stop.addActionListener(listener2);

        info = new JLabel("Homestuck Downloader", SwingConstants.CENTER);

        progressBar = new JProgressBar(0, 100);
        progressBar.setValue(0);
        progressBar.setStringPainted(true);

        //create window, add components
        Container pane = getContentPane();
        pane.setLayout(new GridLayout(4,1));
        pane.add(info);
        pane.add(progressBar);
        pane.add(start);
        pane.add(stop);


        // 4 methods to create a window
        setSize(300,200);
        setTitle("Homestuck Downloader");
        setVisible(true);
        setDefaultCloseOperation(EXIT_ON_CLOSE);

    }

    private class EventHandler implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            // while working, do this
            setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
            progressBar.setIndeterminate(true);
            Runnable r = new Downloader();
            new Thread(r).start();
        }
    }

    private class EventHandler2 implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            // stop the program and return mouse and progressbar to normal
            setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
            progressBar.setIndeterminate(false);
            Downloader stop = new Downloader();
        }
    }
}