getPositionForChild method

@override Offset getPositionForChild(Size size, Size childSize)

size — the layout box size (= the screen, see class doc); childSize — the tooltip's actual size after layout.

Implementation

@override
Offset getPositionForChild(Size size, Size childSize) {
  assert(
    size.width == screenLocal.width && size.height == screenLocal.height,
    'layout box must be the screen (screenLocal.size == box size)',
  );
  for (final side in _sideOrder) {
    final offset = _offsetFor(side, childSize);
    if (_fits(offset, childSize)) return offset;
  }
  // No side fit (tooltip/hole larger than the screen) — a corner.
  return Offset(
    screenLocal.left + _fallbackPadding,
    screenLocal.top + _fallbackPadding,
  );
}