moveTo method

void moveTo(Worksheet sourceWorksheet, int destinationIndex)

Represents moving worksheet .

Implementation

void moveTo(Worksheet sourceWorksheet, int destinationIndex) {
  if (innerList.length <= 1) {
    throw Exception('It requires at least two sheets to change positions.');
  }
  if (innerList.length - 1 < destinationIndex) {
    throw Exception(
        'destinationIndex should be in the range of worksheet count');
  }
  if (destinationIndex < 0) {
    throw Exception('destinationIndex should be starts from 0');
  }

  if (sourceWorksheet.index - 1 != destinationIndex) {
    final List<Worksheet> tempInnerList = <Worksheet>[];
    bool isDestinationWorksheet = false;
    final int sourceWorkSheetIndex = sourceWorksheet.index - 1;
    if (sourceWorkSheetIndex > -1) {
      for (int count = 0; count <= innerList.length - 1; count++) {
        if (count == destinationIndex) {
          tempInnerList.add(sourceWorksheet);
          if (destinationIndex != innerList.length - 1) {
            isDestinationWorksheet = true;
          }
        }
        if (count < destinationIndex || count > destinationIndex) {
          if (!tempInnerList.contains(innerList[count]) &&
              innerList[count] != sourceWorksheet) {
            tempInnerList.add(innerList[count]);
            if (innerList[count] == innerList[innerList.length - 1] &&
                destinationIndex - 1 == innerList.length - 1) {
              tempInnerList.add(sourceWorksheet);
            }
          } else {
            destinationIndex += 1;
          }
        }
        if (isDestinationWorksheet) {
          tempInnerList.add(innerList[destinationIndex]);
          isDestinationWorksheet = false;
        }
      }
    }
    for (int count1 = 0; count1 <= tempInnerList.length - 1; count1++) {
      innerList[count1] = tempInnerList[count1];
    }
  }
}