isNonNegative property

bool get isNonNegative

Whether every dimension is non-negative.

Implementation

bool get isNonNegative {
  return _left >= 0.0 &&
      _right >= 0.0 &&
      _start >= 0.0 &&
      _end >= 0.0 &&
      _top >= 0.0 &&
      _bottom >= 0.0;
}