lerp method

@override SelectMenuItemSpec lerp(double t)

Returns the value this variable has at the given animation clock value.

The default implementation of this method uses the +, -, and * operators on T. The begin and end properties must therefore be non-null by the time this method is called.

In general, however, it is possible for this to return null, especially when t=0.0 and begin is null, or t=1.0 and end is null.

Implementation

@override
SelectMenuItemSpec lerp(double t) {
  if (begin == null && end == null) {
    return const SelectMenuItemSpec();
  }

  if (begin == null) {
    return end!;
  }

  return begin!.lerp(end!, t);
}