Calendar.java

import javax.swing.JPanel;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Cursor;

import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import java.time.LocalDate;
import java.time.YearMonth;
import java.time.format.DateTimeFormatter;

public class Calendar extends JPanel
{
    private static final long serialVersionUID = 1L;

    public Calendar(int year, int month, LocalDate selectedDay, JPanel mainPanel, Database database)
    {
        DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern("dd-MM-yyyy");

        setLayout(new BorderLayout(30, 30));
        // stands for pixels, determines where the stuff is
        setBorder(BorderFactory.createEmptyBorder(40, 20, 30, 20));
        setBackground(Color.white);
        JPanel top = new JPanel(new BorderLayout(10,10));

        top.setBackground(null);
        // In the future, maybe add the thing from my to do list that gives the current date
        JLabel date = new JLabel(LocalDate.of(year,month,1)
            .format(DateTimeFormatter.ofPattern("MMMM yyyy")));
        date.setHorizontalAlignment(JLabel.CENTER);
        //Changes the font (font, bold, size)
        date.setFont(new Font("Helvetica", Font.BOLD, 30));
        date.setForeground(Color.decode("#0ecf7"));
        top.add(date, BorderLayout.CENTER);


        // This section runs the right arrow
        // This line of code should refer to the right.png file from my pics folder
        JLabel right = new JLabel(new ImageIcon("pics/right.png"));
        // Above, we have imported java.awt.Cursor for this to work
        right.setCursor(new Cursor(Cursor.HAND_CURSOR));
        // this section has autoimplemented methods (automatically gave it to me)
        // it is an actionlistener, when you click soemthing, it will change an object based on the action
        right.addMouseListener(new MouseListener()
        {
            @Override
            public void mouseReleased(MouseEvent e) 
            {
            }

            @Override
            public void mousePressed(MouseEvent e) 
            {
            }
            
            @Override
            public void mouseExited(MouseEvent e) 
            {
            }

            @Override
            public void mouseEntered(MouseEvent e) 
            {
            }

            @Override
            public void mouseClicked(MouseEvent e) 
            {
                mainPanel.removeAll();
                // used when clicking the arrow to move to the next month and if its december, it goes to the next year
                if (month!= 12)
                {
                    mainPanel.add(new Calendar(year, month+1, selectedDay, mainPanel, database));
                }
                else
                {
                    mainPanel.add(new Calendar(year+1, 1, selectedDay, mainPanel, database));
                }
                mainPanel.add(new Events(selectedDay, database, mainPanel));

                mainPanel.revalidate();
            }
        });
        // Puts arrow on the top right  
        top.add(right, BorderLayout.EAST);

        // This section runs the left arrow
        JLabel left = new JLabel(new ImageIcon("pics/left.png"));
        left.setCursor(new Cursor(Cursor.HAND_CURSOR));
        left.addMouseListener(new MouseListener()
        {
            @Override
            public void mouseReleased(MouseEvent e) 
            {
            }

            @Override
            public void mousePressed(MouseEvent e) 
            {
            }
            
            @Override
            public void mouseExited(MouseEvent e) 
            {
            }

            @Override
            public void mouseEntered(MouseEvent e) 
            {
            }

            @Override
            public void mouseClicked(MouseEvent e) 
            {
                mainPanel.removeAll();
                // used when clicking the arrow to move to the next month and if its december, it goes to the next year
                if (month!= 1)
                {
                    mainPanel.add(new Calendar(year, month-1, selectedDay, mainPanel, database));
                }
                else
                {
                    mainPanel.add(new Calendar(year-1, 12, selectedDay, mainPanel, database));
                }
                mainPanel.add(new Events(selectedDay, database, mainPanel));
                mainPanel.revalidate();
            }
        });
        // Puts arrow on the top left  
        top.add(left, BorderLayout.WEST);
        
        add(top, BorderLayout.NORTH);

        //imported gridLayout above
        JPanel days = new JPanel(new GridLayout(7, 7));
        days.setBackground(null);

        Color header = Color.decode("#f90069");
        days.add(new DayLabel("Su", header, Color.white, false));
        days.add(new DayLabel("Mo", header, Color.white, false));
        days.add(new DayLabel("Tu", header, Color.white, false));
        days.add(new DayLabel("We", header, Color.white, false));
        days.add(new DayLabel("Th", header, Color.white, false));
        days.add(new DayLabel("Fr", header, Color.white, false));
        days.add(new DayLabel("Sa", header, Color.white, false));


        String[] weekDays = new String [] {"SUNDAY", "MONDAY", "TUESDAY","WEDNESDAY", "THURSDAY", "FRIDAY", "SATURDAY"};

        //possible because of import Local Time
        LocalDate firstDay = LocalDate.of(year, month, 1);



















        int j = 0;
        while(!firstDay.getDayOfWeek().toString().equals(weekDays[j]))
        {
            days.add(new DayLabel("", Color.decode("#f0f0f0"), Color.black,false));
            j++;
        }

        int daysNum = YearMonth.of(year, month).lengthOfMonth(); 
        //This for loop is for creating the days of the month in our calendar
        for (int i = 1; i<= daysNum;i++)
        {
            final int day = i;
            DayLabel dayLabel;
            // this if function highlights green the current day of the month
            if(selectedDay.getYear()==year && selectedDay.getMonthValue()==month && selectedDay.getDayOfMonth()==i)
            {
                dayLabel = new DayLabel(i+"", Color.decode("#0ecf78"), Color.black, true);
            }
            // this highlights blue every fifth day of the month
            else if(database.hasEvent(dateFormatter.format(LocalDate.of(year,month,i))))
            {
                dayLabel = new DayLabel(i+"", Color.decode("#00d1e8"), Color.black, true);
            }
            else
            {
                dayLabel = new DayLabel(i+"", Color.decode("#f0f0f0"), Color.black, true);
            }
            dayLabel.addMouseListener(new MouseListener() {
                @Override
                public void mouseReleased(MouseEvent e) 
                {
                }

                @Override
                public void mousePressed(MouseEvent e) 
                {
                }
                
                @Override
                public void mouseExited(MouseEvent e) 
                {
                }

                @Override
                public void mouseEntered(MouseEvent e) 
                {
                }

                @Override
                public void mouseClicked(MouseEvent e) 
                {
                    mainPanel.removeAll();
                    
                    LocalDate selected = LocalDate.of(year,month, day);
                    mainPanel.add(new Calendar(year, month, selected, mainPanel, database));

                    mainPanel.add(new Events(selected, database, mainPanel));
                    mainPanel.revalidate();
                }
            });
            days.add(dayLabel);
        }

        for (int i = 0; i<(42-(j+daysNum));i++)
        {
                days.add(new DayLabel("", Color.decode("#f0f0f0"), Color.black, true));
        }

        add(days, BorderLayout.CENTER);
        


    }
    
}