Gradient constructor Null safety
- {required List<
Color> colors, - List<
double> ? stops, - GradientTransform? transform}
Initialize the gradient's colors and stops.
The colors argument must not be null, and must have at least two colors (the length is not verified until the createShader method is called).
If specified, the stops argument must have the same number of entries as colors (this is also not verified until the createShader method is called).
The transform argument can be applied to transform only the gradient,
without rotating the canvas itself or other geometry on the canvas. For
example, a GradientRotation(math.pi/4)
will result in a SweepGradient
that starts from a position of 6 o'clock instead of 3 o'clock, assuming
no other rotation or perspective transformations have been applied to the
Canvas. If null, no transformation is applied.
Implementation
const Gradient({
required this.colors,
this.stops,
this.transform,
}) : assert(colors != null);