Calendar.java

[wyenter]

import javax.swing.; import javax.swing.table.; import javax.swing.event.; import java.util.; import java.awt.; import java.awt.event.;

public class Calendar extends JApplet{ static JFrame frame; static Container pane; static JButton next, prev; static JLabel month, year; static JTable calendar; static DefaultTableModel mdlCalendar; static JScrollPane scroll; static JPanel panel; static int realDay, realMonth, realYear, currentMonth, currentYear; //year selection static JComboBox yearSelect;

public static void main(String args[]){
    //theme
    try {UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());}
    catch (ClassNotFoundException e) {}
    catch (InstantiationException e) {}
    catch (IllegalAccessException e) {}
    catch (UnsupportedLookAndFeelException e) {}

    //make frame
    frame = new JFrame("Appointments");
    frame.setSize(330, 375);
    pane = frame.getContentPane();
    pane.setLayout(null);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    month = new JLabel("January");
    year = new JLabel("Change year:");
    yearSelect = new JComboBox();
    prev = new JButton("<<");
    next = new JButton(">>");
    mdlCalendar = new DefaultTableModel();
    calendar = new JTable(mdlCalendar);
    scroll = new JScrollPane(calendar);

    panel = new JPanel(null);
    panel.setBorder(BorderFactory.createTitledBorder("Calendar")); //set border

    //add controls to pane
    pane.add(panel);
    panel.add(month);
    panel.add(year);
    panel.add(yearSelect);
    panel.add(prev);
    panel.add(next);
    panel.add(scroll);

    //positioning
    panel.setBounds(0, 0, 320, 335);
    month.setBounds(160-month.getPreferredSize().width/2, 25, 100, 25);
    year.setBounds(10, 305, 80, 20);
    yearSelect.setBounds(230, 305, 80, 20);
    prev.setBounds(10, 25, 50, 25);
    next.setBounds(260, 25, 50, 25);
    scroll.setBounds(10, 50, 300, 250);

    //make visible
    frame.setResizable(false);
    frame.setVisible(true);
    pane.setVisible(true);
    month.setVisible(true);
    year.setVisible(true);
    yearSelect.setVisible(true);
    prev.setVisible(true);
    next.setVisible(true);
    calendar.setVisible(true);
    scroll.setVisible(true);
    panel.setVisible(true);

    //Get the real dates
    GregorianCalendar cal = new GregorianCalendar();
    realDay = cal.get(GregorianCalendar.DAY_OF_MONTH);
    realMonth = cal.get(GregorianCalendar.MONTH);
    realYear = cal.get(GregorianCalendar.YEAR);
    currentMonth = realMonth;
    currentYear = realYear;

    //Populate ComboBox
    for(int i = realYear - 100; i < realYear + 100; i++){
        yearSelect.addItem(String.valueOf(i));
    }

    String[] headers = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"}; //All headers
    for (int i=0; i<7; i++){
        mdlCalendar.addColumn(headers[i]);
    }

    //no reszing or reordering
    calendar.getParent().setBackground(calendar.getBackground());
    calendar.getTableHeader().setResizingAllowed(false);
    calendar.getTableHeader().setReorderingAllowed(false);

    //Single cell selection
    calendar.setColumnSelectionAllowed(true);
    calendar.setRowSelectionAllowed(true);
    calendar.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

    //Set row/column count
    calendar.setRowHeight(38);
    mdlCalendar.setColumnCount(7);
    mdlCalendar.setRowCount(6);

    refreshCalendar(realMonth, realYear);

    //set up event listeners
    prev.addActionListener(new prevAction());
    next.addActionListener(new nextAction());
    yearSelect.addActionListener(new selectYear());
}

//Refreshes the calendar
public static void refreshCalendar(int mon, int year){
    String[] months = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
    int nod, som; //Number of Days, Start of Month

    prev.setEnabled(true);
    next.setEnabled(true);
    if (mon == 0 && year <= realYear-10){prev.setEnabled(false);} //Too early
    if (mon == 11 && year >= realYear+100){next.setEnabled(false);} //Too late
    month.setText(months[mon]);
    month.setBounds(160-month.getPreferredSize().width/2, 25, 180, 25); //Re-align label with calendar
    yearSelect.setSelectedItem(String.valueOf(year)); //Select the correct year in the combo box

    //Get first day of month and number of days
    GregorianCalendar cal = new GregorianCalendar(year, mon, 1);
    nod = cal.getActualMaximum(GregorianCalendar.DAY_OF_MONTH);
    som = cal.get(GregorianCalendar.DAY_OF_WEEK);

    //Clear table
    for (int i=0; i<6; i++){
        for (int j=0; j<7; j++){
            mdlCalendar.setValueAt(null, i, j);
        }
    }

    //Draw calendar
    for (int i=1; i<=nod; i++){
        int row = ((i+som-2)/7);
        int column  =  (i+som-2)%7;
                Integer j = new Integer(i);
        mdlCalendar.setValueAt(j, row, column);
    }
}
static class prevAction implements ActionListener{

    @Override
    public void actionPerformed(ActionEvent e) {
        if(currentMonth == 0){
            currentMonth = 11;
            currentYear -= 1;
        }
        else{
            currentMonth -= 1;
        }
        refreshCalendar(currentMonth, currentYear);
    }
 }

static class nextAction implements ActionListener{

    @Override
    public void actionPerformed(ActionEvent e) {
        if(currentMonth == 11){
            currentMonth = 0;
            currentYear += 1;
        }
        else{
            currentMonth += 1;
        }
        refreshCalendar(currentMonth, currentYear);
    }
 }

static class selectYear implements ActionListener{
    @Override
    public void actionPerformed(ActionEvent e){
        if(yearSelect.getSelectedItem() != null){
            String b = yearSelect.getSelectedItem().toString();
            currentYear = Integer.parseInt(b);
            refreshCalendar(currentMonth, currentYear);
        }
    }
}

}