operator == method

  1. @override
bool operator ==(
  1. Object other
)

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

@override
bool operator ==(Object other) =>
    other is PaintStyle &&
    super == other &&
    fillColor == other.fillColor &&
    fillGradient == other.fillGradient &&
    // fillShader will not check.
    strokeColor == other.strokeColor &&
    strokeGradient == other.strokeGradient &&
    // strokeShader will not check
    gradientBounds == other.gradientBounds &&
    blendMode == other.blendMode &&
    strokeWidth == other.strokeWidth &&
    strokeCap == other.strokeCap &&
    strokeJoin == other.strokeJoin &&
    strokeMiterLimit == other.strokeMiterLimit &&
    elevation == other.elevation &&
    shadowColor == other.shadowColor &&
    deepCollectionEquals(dash, other.dash) &&
    dashOffset == other.dashOffset;