stateToIndex method

int stateToIndex(int state)

Converts a state index to an offset index.

• state: The index of the state.
• Returns: The corresponding index in the snapping offsets list.
• Throws: AssertionError if the state index is out of range.

Implementation

int stateToIndex(int state) {
  assert(
    state >= 0 && state < snappingPixelOffsets.length ||
        snappingPixelOffsets.isEmpty,
    'Provided state index is out of range for snapping positions. '
    'Please ensure unique offsets and valid states.\n'
    'State index: $state, Snapping offsets length: ${snappingPixelOffsets.length}\n'
    'State offsets: $snappingPixelOffsets\n'
    'Min and max offsets: $minOffset : $maxOffset',
  );

  if (snappingPixelOffsets.isEmpty) {
    return 0;
  }

  return snappingPixelOffsets.length - 1 - state;
}