horizontalConstraints static method

BoxConstraints horizontalConstraints({ required BoxConstraints constraints, required double? top, required double? bottom, required double? right, required double? left, required double margin, required bool isRight, required Offset target, })

Implementation

static BoxConstraints horizontalConstraints({
  required BoxConstraints constraints,
  required double? top,
  required double? bottom,
  required double? right,
  required double? left,
  required double margin,
  required bool isRight,
  required Offset target,
}) {
  var maxHeight = constraints.maxHeight;
  var minWidth = constraints.minWidth;
  var maxWidth = constraints.maxWidth;

  if (top != null && bottom != null) {
    maxHeight = maxHeight - (top + bottom);
  } else if ((top != null && bottom == null) ||
      (top == null && bottom != null)) {
    // make sure that the sum of top, bottom + _maxHeight isn't bigger than the screen Height.
    final sideDelta = (top ?? 0.0) + (bottom ?? 0.0) + margin;

    if (maxHeight > maxHeight - sideDelta) {
      maxHeight = maxHeight - sideDelta;
    }
  } else {
    if (maxHeight > maxHeight - 2 * margin) {
      maxHeight = maxHeight - 2 * margin;
    }
  }

  if (isRight) {
    if (right != null) {
      minWidth = maxWidth = maxWidth - right - target.dx;
    } else {
      maxWidth = min(maxWidth, maxWidth - target.dx) - margin;
    }
  } else {
    if (left != null) {
      minWidth = maxWidth = target.dx - left;
    } else {
      maxWidth = min(maxWidth, target.dx) - margin;
    }
  }

  return constraints.copyWith(
    maxHeight: maxHeight,
    minWidth: minWidth,
    maxWidth: maxWidth,
  );
}