HourColumn constructor

Implementation

HourColumn({required this.manager, required Listenable repaint})
    : _revision = manager.revision,
      super(repaint: repaint) {
  // Grid-space top of each hour-row: the first row starts at 0 (the grid top),
  // each subsequent one a `blockHeight` below. HourLabel maps this through the
  // current scroll/zoom and centers the text in the row — the old code baked a
  // hardcoded `15` offset into the start instead (#28).
  double pos = 0;
  for (final text in buildHourLabels(manager.config)) {
    _labels.add(HourLabel(
      label: text,
      position: pos,
      manager: manager,
    ));
    pos += manager.config.blockHeight;
  }
}