getSafeColorStops method

List<double> getSafeColorStops()

返回colorStops

如果提供了 stops，则直接返回，否则我们使用颜色列表计算它

Implementation

List<double> getSafeColorStops() {
  var resultStops = <double>[];
  if (stops == null || stops!.length != colors.length) {
    if (colors.length > 1) {
      /// provided colorStops is invalid and we calculate it here
      colors.asMap().forEach((index, color) {
        final percent = 1.0 / (colors.length - 1);
        resultStops.add(percent * index);
      });
    } else {
      throw ArgumentError('"colors" must have length > 1.');
    }
  } else {
    resultStops = stops!;
  }
  return resultStops;
}