opacity method

void opacity(double value)

Replaces opacity on supported widgets.

Value must be in the range 0.0 to 1.0 inclusive.

Implementation

void opacity(double value) {
  if (value < 0 || value > 1) {
    throw ArgumentError.value(
      value,
      'opacity',
      'must be between 0.0 and 1.0 inclusive.',
    );
  }
  _opacity = value;
}