getTimeAtPos method

Implementation

PlannerTime getTimeAtPos(Offset pos) {
  Offset realPos = _toGridPos(pos);

  // Clamp to valid ranges so taps above/left of the grid (negative) or past
  // the last column/hour (grid smaller than the viewport) can't produce an
  // out-of-range day/hour.
  int day = (realPos.dx / config.blockWidth)
      .floor()
      .clamp(0, config.labels.length - 1);

  // Row index from the top of the grid, plus the proportional minute offset
  // into that row (pixels -> minutes via blockHeight, not a hardcoded 40),
  // snapped to the configured interval so a created event lands on the same
  // grid a dragged one does.
  final double rawRow = realPos.dy / config.blockHeight;
  final int row = rawRow.floor();
  int hour = config.minHour + row;
  int minutes = snapToInterval(((rawRow - row) * 60).floor());

  // A tap outside the grid clamps to a valid hour; its minute offset is
  // meaningless, so pin it to the hour boundary.
  if (hour < config.minHour) {
    hour = config.minHour;
    minutes = 0;
  } else if (hour > config.maxHour) {
    hour = config.maxHour;
    minutes = 0;
  }

  return PlannerTime(day: day, hour: hour, minutes: minutes);
}