leftMostXtoTarget static method

double leftMostXtoTarget({ required double? left, required double? right, required double margin, required Size size, required Size childSize, required Offset target, })

Implementation

static double leftMostXtoTarget({
  required double? left,
  required double? right,
  required double margin,
  required Size size,
  required Size childSize,
  required Offset target,
}) {
  double leftMostXtoTarget;

  if (left != null) {
    leftMostXtoTarget = left;
  } else if (right != null) {
    // leftMostXtoTarget
    //               ________________________
    //               |                      |
    //               |   childSize.width    |
    //               ________________________
    //
    //    topLeft -> |  |                             |  | <- topRight
    //               |  |                             |  |
    //               |  |                             |  |
    //                ^                                ^
    //          margin                 margin
    leftMostXtoTarget = max(
      size.topLeft(Offset.zero).dx + margin,
      size.topRight(Offset.zero).dx - margin - childSize.width - right,
    );
  } else {
    leftMostXtoTarget = max(
      margin,
      min(
        target.dx - childSize.width / 2,
        size.topRight(Offset.zero).dx - margin - childSize.width,
      ),
    );
  }

  return leftMostXtoTarget;
}