doShow method

@override void doShow()

Implementation

@override
void doShow() {
  if (_yearBegin == 0) getLength();
  var _maxLevel = getMaxLevel();
  for (int i = 0; i < _maxLevel; i++) {
    int colType = getColumnType(i);
    switch (colType) {
      case 0:
        picker!.selecteds[i] = yearEnd != null && value!.year > yearEnd!
            ? yearEnd! - _yearBegin
            : value!.year - _yearBegin;
        break;
      case 1:
        picker!.selecteds[i] = value!.month - 1;
        break;
      case 2:
        picker!.selecteds[i] = value!.day - 1;
        break;
      case 3:
        var h = value!.hour;
        if ((minHour != null && minHour! >= 0) ||
            (maxHour != null && maxHour! <= 23)) {
          if (minHour != null) {
            h = h > minHour! ? h - minHour! : 0;
          } else {
            h = (maxHour ?? 23) - (minHour ?? 0) + 1;
          }
        }
        picker!.selecteds[i] = h;
        break;
      case 4:
        if (minuteInterval == null || minuteInterval! < 2) {
          picker!.selecteds[i] = value!.minute;
        } else {
          picker!.selecteds[i] = value!.minute ~/ minuteInterval!;
          final m = picker!.selecteds[i] * minuteInterval!;
          if (m != value!.minute) {
            // 需要更新 value
            var s = value!.second;
            if (type != 2 && type != 6) s = 0;
            value = DateTime(
                value!.year, value!.month, value!.day, value!.hour, m, s);
          }
        }
        break;
      case 5:
        picker!.selecteds[i] = value!.second;
        break;
      case 6:
        picker!.selecteds[i] = (value!.hour > 12 || value!.hour == 0) ? 1 : 0;
        break;
      case 7:
        picker!.selecteds[i] = value!.hour == 0
            ? 11
            : (value!.hour > 12)
                ? value!.hour - 12 - 1
                : value!.hour - 1;
        break;
    }
  }
}