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();
		}
	}
}