medium

1.dart

 rowsList.asMap().entries.forEach((rows) {
        //нам нужно определить пересекается ли текущий элемент с элементом который слева или же сверху, если пересекается,
        //тогда текущий элемент мы двигаем вниз или справо в зависимости
        //mark: left 
        if (currentRow.iRow != 0) {
          calcOverflowLeft(rowsList.elementAt(currentRow.iRow - 1), currentRow);
        }
        //mark: top
        if (currentRow.iColumn != 0) {
          calcOverflowTop(
              suggestionMatrix[currentRow.iColumn - 1]
                  .elementAt(currentRow.iRow),
              currentRow);
        }

        //mark: left top first
        if (currentRow.iRow != 0 &&
            currentRow.iRow + 1 < rowsList.length &&
            currentRow.iColumn >= 1) {
          caclLeftTopElementOverflow(
              suggestionMatrix[iColumn - 1].elementAt(currentRow.iRow),
              rowsList.elementAt(currentRow.iRow + 1));
        }

2.dart

caclLeftTopElementOverflow(
      SuggestionCategory prev, SuggestionCategory current) {
    final currentYStartPosition = current.y;
    final prevYEndPosition = prev.y + prev.height;

    final currentXStartPosition = current.x;
    final prevXEndPosition = prev.x + prev.width;
    if (prevYEndPosition >= currentYStartPosition && prev.isExpanded) {
      current.y += (prev.y + prev.height) - current.y;
    }
  }

  void calcOverflowLeft(SuggestionCategory prev, SuggestionCategory current) {
    final currentStartPosition = current.x;
    final prevEndPosition = prev.x + prev.width;
    if (prevEndPosition > currentStartPosition) {
      current.x += prevEndPosition - currentStartPosition;
    } else if (prevEndPosition < currentStartPosition) {
      current.x -= currentStartPosition - prevEndPosition;
    } else if (prevEndPosition != currentStartPosition) {
      print(
          "prevEndPosition = $prevEndPosition currentStartPosition=$currentStartPosition");
    }
  }

  void calcOverflowTop(SuggestionCategory prev, SuggestionCategory current) {
    final currentStartPosition = current.y;
    final prevEndPosition = prev.y + prev.height;
    if (prevEndPosition > currentStartPosition) {
      current.y += prevEndPosition - currentStartPosition;
    } else if (prevEndPosition < currentStartPosition) {
      current.y -= currentStartPosition - prevEndPosition;
    } else if (prevEndPosition != currentStartPosition) {
      print(
          "prevEndPosition = $prevEndPosition currentStartPosition=$currentStartPosition");
    }
  }