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|
public class JCalendar
extends JPanel {
private Locale _locale = getDefaultLocale();
private GregorianCalendar _calendar = new GregorianCalendar();
private DateFormatSymbols _dateSymbols = new DateFormatSymbols();
private SimpleDateFormat _formatMY = new SimpleDateFormat("MMMM yyyy");
private int _firstDayOfWeek = _calendar.getFirstDayOfWeek();
private final JLabel _monthYear = new JLabel("", SwingUtilities.CENTER);
private final JLabel[] _daysOfWeek = new JLabel[7];
private final JButton[] _daysNumber = new JButton[42];
private final ActionListener _getDate = new ActionListener() {
public void actionPerformed(final ActionEvent dt) {
System.out.println(dt.getActionCommand());
}
};
private final ActionListener _changeMonth = new ActionListener() {
public void actionPerformed(final ActionEvent ae) {
final int nb = "next".equals(ae.getActionCommand()) ? 1 : -1;
_calendar.add(Calendar.MONTH, nb);
updateMonthYear();
updateDaysNumber();
}
};
public JCalendar() {
setLayout(new BorderLayout());
// Month Panel
final JPanel monthPanel = new JPanel();
final JButton previous = new JButton("<<");
previous.addActionListener(_changeMonth);
final JButton next = new JButton(">>");
next.addActionListener(_changeMonth);
next.setActionCommand("next");
_monthYear.setPreferredSize(new Dimension(120, 20));
monthPanel.add(previous);
monthPanel.add(_monthYear);
monthPanel.add(next);
add(monthPanel, BorderLayout.NORTH);
// Day Panel
final JPanel dayPanel = new JPanel();
dayPanel.setLayout(new GridLayout(7, 7));
for (int i = 0; i < 7; ++i) {
dayPanel.add(_daysOfWeek[i] = new JLabel("", SwingUtilities.CENTER));
}
for (int i = 0; i < _daysNumber.length; ++i) {
dayPanel.add(_daysNumber[i] = new JButton());
}
add(dayPanel, BorderLayout.CENTER);
// Remplissage des composants
updateMonthYear();
updateDaysOfWeek();
updateDaysNumber();
}
// Réactualise la locale et réaffiche le contenu des composants
private void updateLocale(final Locale locale) {
_locale = locale;
final Date tmp = _calendar.getTime();
_calendar = new GregorianCalendar(_locale);
_calendar.setTime(tmp);
_firstDayOfWeek = _calendar.getFirstDayOfWeek();
_dateSymbols = new DateFormatSymbols(_locale);
_formatMY = new SimpleDateFormat("MMMM yyyy", _locale);
updateMonthYear();
updateDaysOfWeek();
updateDaysNumber();
}
// Affiche le mois et l'année en cours
private void updateMonthYear() {
_monthYear.setText(_formatMY.format(_calendar.getTime()));
}
// Affiche les jours de la semaine
private void updateDaysOfWeek() {
final String[] weekDays = _dateSymbols.getShortWeekdays();
for (int i = 1; i < weekDays.length; ++i) {
final int index = (i - 2 + _firstDayOfWeek) % 7 + 1;
_daysOfWeek[i - 1].setText(weekDays[index]);
}
}
// Affiche le numéro des jours
private void updateDaysNumber() {
final Date tmp = _calendar.getTime();
_calendar.set(Calendar.DAY_OF_MONTH, 1);
final int firstDay = _calendar.get(Calendar.DAY_OF_WEEK);
final int LocalFirstDay = (firstDay - _firstDayOfWeek + 7) % 7 + 1;
boolean full = false;
for (int i = 0; i < _daysNumber.length; ++i) {
//Détermine si le composant est affiché ou non
final boolean isNotEmpty = i < LocalFirstDay - 1 || full;
_daysNumber[i].setVisible(!isNotEmpty);
_daysNumber[i].addActionListener(_getDate);
// Affichage du jour
if (!isNotEmpty) {
final int dayOfMonth = _calendar.get(Calendar.DAY_OF_MONTH);
_daysNumber[i].setText(String.valueOf(dayOfMonth));
_calendar.add(Calendar.DAY_OF_MONTH, 1);
full = 1 == _calendar.get(Calendar.DAY_OF_MONTH);
}
_daysNumber[i].setActionCommand(_daysNumber[i].getText());
}
_calendar.setTime(tmp);
}
public static void main(String[] args) {
final JDialog frame = new JDialog();
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.getContentPane().add(new JCalendar());
frame.setLocationRelativeTo(null);
frame.pack();
frame.setVisible(true);
}
} |
