setOpacity method

void setOpacity(
  1. double opacity, {
  2. T? paintId,
})

Changes the opacity of the paint

Implementation

void setOpacity(double opacity, {T? paintId}) {
  if (opacity < 0 || opacity > 1) {
    throw ArgumentError('Opacity needs to be between 0 and 1');
  }

  getPaint(paintId).color = paint.color.withOpacity(opacity);
}