fromJson method

@override Gradient? fromJson(Map<String, dynamic>? json)

Implementation

@override
Gradient? fromJson(Map<String, dynamic>? json) {
  if (json == null) return null;

  var type = json['type'];

  switch (type) {
    case 'linear':
      return LinearGradient(
        begin: const NullableAlignmentConverter().fromJson(
              json['begin'],
            ) ??
            Alignment.centerLeft,
        colors: _decodeStringList<Color>(
          json['colors'],
          (json) {
            var color = const NullableColorConverter().fromJson(json);

            return color!;
          },
        )!,
        end: const NullableAlignmentConverter().fromJson(
              json['end'],
            ) ??
            Alignment.centerRight,
        stops: _decodeDynamicList<double>(
          json['stops'],
          (json) => (json as num).toDouble(),
        ),
        tileMode: const NullableTileModeConverter().fromJson(
              json['tileMode'],
            ) ??
            TileMode.clamp,
        transform: const NullableGradientTransformConverter().fromJson(
          json['transform'],
        ),
      );

    case 'radial':
      return RadialGradient(
        center: const NullableAlignmentConverter().fromJson(
              json['center'],
            ) ??
            Alignment.center,
        colors: _decodeStringList<Color>(
          json['colors'],
          (json) => const NullableColorConverter().fromJson(json)!,
        )!,
        focal: const NullableAlignmentConverter().fromJson(
          json['focal'],
        ),
        focalRadius: ((json['focalRadius'] ?? 0.0) as num).toDouble(),
        radius: ((json['radius'] ?? 0.5) as num).toDouble(),
        stops: _decodeDynamicList<double>(
          json['stops'],
          (json) => (json as num).toDouble(),
        ),
        tileMode: const NullableTileModeConverter().fromJson(
              json['tileMode'],
            ) ??
            TileMode.clamp,
        transform: const NullableGradientTransformConverter().fromJson(
          json['transform'],
        ),
      );

    case 'sweep':
      return SweepGradient(
        center: const NullableAlignmentConverter().fromJson(
              json['center'],
            ) ??
            Alignment.center,
        colors: _decodeStringList<Color>(
          json['colors'],
          (json) => const NullableColorConverter().fromJson(json)!,
        )!,
        endAngle: ((json['endAngle'] ?? math.pi * 2) as num).toDouble(),
        startAngle: ((json['startAngle'] ?? 0.0) as num).toDouble(),
        stops: _decodeDynamicList<double>(
          json['stops'],
          (json) => (json as num).toDouble(),
        ),
        tileMode: const NullableTileModeConverter().fromJson(
              json['tileMode'],
            ) ??
            TileMode.clamp,
        transform: const NullableGradientTransformConverter().fromJson(
          json['transform'],
        ),
      );
  }

  throw 'Unsuported_Json_Value';
}