operator == method

bool operator ==(
  1. Object color
)
inherited

The equality operator.

The default behavior for all Objects is to return true if and only if this object and other are the same object.

Override this method to specify a different equality relation on a class. The overriding method must still be an equivalence relation. That is, it must be:

  • Total: It must return a boolean for all arguments. It should never throw.

  • Reflexive: For all objects o, o == o must be true.

  • Symmetric: For all objects o1 and o2, o1 == o2 and o2 == o1 must either both be true, or both be false.

  • Transitive: For all objects o1, o2, and o3, if o1 == o2 and o2 == o3 are true, then o1 == o3 must be true.

The method should also be consistent over time, so whether two objects are equal should only change if at least one of the objects was modified.

If a subclass overrides the equality operator, it should override the hashCode method as well to maintain consistency.

Implementation

bool operator ==(Object color) {
  if (color is BaseColor) {
    final _v1 = toHex().replaceAll('#', '').split('');

    final _r1 = int.parse(_v1[0].toString() + _v1[1].toString(), radix: 16);
    final _g1 = int.parse(_v1[2].toString() + _v1[3].toString(), radix: 16);
    final _b1 = int.parse(_v1[4].toString() + _v1[5].toString(), radix: 16);

    final _v2 = color.toHex().replaceAll('#', '').split('');

    final _r2 = int.parse(_v2[0].toString() + _v2[1].toString(), radix: 16);
    final _g2 = int.parse(_v2[2].toString() + _v2[3].toString(), radix: 16);
    final _b2 = int.parse(_v2[4].toString() + _v2[5].toString(), radix: 16);

    if (abs(_r1 - _r2) < 3 && abs(_g1 - _g2) < 3 && abs(_b1 - _b2) < 3) {
      return true;
    }
  }
  return false;
}