!7

concept CalendarEntry {
  YMD date;
  S text;
}

module Calendar > DynSCP {
  int year = localYear()-1, month = localMonth();
  
  start {
    db();
    setModuleName("Calendar (" + month + "/" + year + ")");
  }
  
  visualize2 {
    int days = daysInMonth(year, month);
    int weekDay = dayOfWeek_nr(calendarFromYMD(year, month, 1))-1;
    print("Weekday " + year + "/" + month + "/" + 1 + ": " + weekDay);
    new LL<Component> rows;
    rows.add(map(intRangeList(7), func(int i) -> Component {
      jcenteredlabel(shortEnglishWeekdays().get(i)) }));
    rows.add(new L);
    for (int i = 1; i <= days; i++) {
      if (l(last(rows)) > weekDay) rows.add(new L);
      while (weekDay > l(last(rows))) last(rows).add(jlabel());
      last(rows).add(jcenteredlabel(str(i)));
      weekDay = (weekDay+1) % 7;
    }
    while (l(last(rows)) < 7) last(rows).add(jlabel());
    ret hvgrid(rows);
  }
}