CalendarView.java

import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.GregorianCalendar;

import javax.swing.*;
import javax.swing.event.ChangeListener;

public class CalendarView{

	public JPanel getPanel() {
		return panel;
	}

	public JPanel getMonth()
	{
		return month;
	}

	private JPanel panel;
	private JPanel month;
	private ArrayList<JButton> days;
	private String dateClicked;
	private ArrayList<ChangeListener> listeners;

	public CalendarView(GregorianCalendar c)
	{
		listeners = new ArrayList<ChangeListener>();
		dateClicked = "1";
		//JFrame jeff = new JFrame();
		panel = new JPanel();
		panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));

		JPanel buttonPanel = new JPanel();
		JButton advance = new JButton(">");
		
		JButton back = new JButton("<");
			

		month = new JPanel();
		month.setLayout(new GridLayout(7, 7));
		days = new ArrayList<JButton>();

		JLabel label = new JLabel();
		label.setText(getMonth(c) + " " + Integer.toString(c.get(Calendar.YEAR)));
		printCalendarDays(c);

		buttonPanel.add(label);
		buttonPanel.add(back);
		buttonPanel.add(advance);

		panel.add(buttonPanel);
		panel.add(month);

		/*jeff.add(month);
		jeff.setVisible(true);
		jeff.setSize(400, 400);
		jeff.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);*/
		/*advance.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				
				c.add(Calendar.MONTH, 1);
				System.out.println(getMonth(c));
				System.out.println(c.get(Calendar.MONTH));
				printCalendarDays(new GregorianCalendar(2019, c.get(Calendar.MONTH), 1));
				month.repaint();
			}
		});
		
		back.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				c.add(Calendar.MONTH, -1);
				System.out.println(getMonth(c));
				printCalendarDays(c);
				month.repaint();
			}
		});	*/
	}

	public void addChangeListener(ChangeListener listener)
	{
		listeners.add(listener);
	}
	public String getDateClicked() {
		
		return dateClicked;
	}

	public ArrayList<JButton> getDays() {
		return days;
	}

	public void printCalendarDays(GregorianCalendar g)
	{
		String[] daysOfWeek = {"Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"};
		for (int i = 0; i < 7; i++)
		{
			month.add(new JLabel(daysOfWeek[i]));
		}
		int day = 1;

		while (day != getDays(g))
		{
			month.add(new JLabel(" "));
			day++;
		}

		ActionListener listeners = new ActionListener(){
			public void actionPerformed(ActionEvent e)
			{
				JButton sourceButton = (JButton)e.getSource();
				dateClicked = sourceButton.getText();
				System.out.println(dateClicked);
				
			}
		};

		day = 1;
		int last = g.getActualMaximum(Calendar.DAY_OF_MONTH);

		JButton button;
		while (day != last + 1)
		{
			button = new JButton(Integer.toString(day));
			button.addActionListener(listeners);
			days.add(button);
			month.add(button);
			day++;
		}
		System.out.println(dateClicked);
	}

	public int getDays(GregorianCalendar cal)
	{

		GregorianCalendar x = new GregorianCalendar(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), 1);
		return x.get(Calendar.DAY_OF_WEEK);

	}

	public String getMonth(GregorianCalendar cal)
	{
		String[] months = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
		int m = cal.get(Calendar.MONTH);
		return months[m];
	}

}