calculateVerticalLayoutData method

List<VerticalLayoutData> calculateVerticalLayoutData(Size size)

Vertical layout of the events.

Calculates the top and bottom of each event, and ensues that they are within the bounds of the widget.

size - The size of the widget.

Implementation

List<VerticalLayoutData> calculateVerticalLayoutData(Size size) {
  final numberOfChildren = events.length;
  final currentCache = <int, VerticalLayoutData>{};
  final cache = layoutCache.getCache(date, heightPerMinute, timeOfDayRange);

  if (cache == null) {
    // If there is no cache, calculate the layout data for each event.
    for (var i = 0; i < numberOfChildren; i++) {
      final id = i;
      final event = events.elementAt(i);
      final eventHash = event.hashCode;
      currentCache[eventHash] = _calculateSingleEventLayout(id, size, event);
    }
  } else {
    // If there is a cache, use it to calculate the layout data for each event.
    for (var i = 0; i < numberOfChildren; i++) {
      final id = i;
      final event = events.elementAt(i);
      final eventHash = event.hashCode;

      final cached = cache[eventHash];
      if (cached == null) {
        currentCache[eventHash] = _calculateSingleEventLayout(id, size, event);
      } else {
        currentCache[eventHash] = cached.copyWith(id: id);
      }
    }
  }

  layoutCache.setCache(date, heightPerMinute, timeOfDayRange, currentCache);
  return sortVerticalLayoutData(currentCache.values.toList());
}