beginGradientFill method
Begins filling a shape with the specified gradient.
If _holeMode is true, the method will do nothing and return this
Graphics object.
If ratios is not specified, the method creates an equal distribution of
color across the gradient.
If begin is not specified, the method uses Alignment.center.
If end is not specified, the method uses Alignment.centerRight.
If rotation is not specified, the method uses 0.0.
If tileMode is not specified, the method uses TileMode.clamp.
If gradientBox is specified, the method uses it to create a gradient
shader that matches the bounding box of the object.
If radius is not specified, the method uses 0.5.
If focalRadius is not specified, the method uses 0.0.
If sweepStartAngle is not specified, the method uses 0.0.
If sweepEndAngle is not specified, the method uses 6.2832.
Returns this Graphics object after beginning the gradient fill. For
GradientType.radial, end is used for RadialGradient.focal, check the
RadialGradient docs to understand the relation with focalRadius
Implementation
Graphics beginGradientFill(
GradientType type,
List<Color> colors, {
List<double>? ratios,
Alignment? begin,
Alignment? end,
double rotation = 0,
TileMode tileMode = TileMode.clamp,
Rect? gradientBox,
/// only radial
double radius = 0.5,
double focalRadius = 0.0,
/// only sweep
double sweepStartAngle = 0.0,
double sweepEndAngle = 6.2832,
}) {
final gradient = _createGradient(
type,
colors,
ratios,
begin,
end,
rotation,
radius,
focalRadius,
sweepStartAngle,
sweepEndAngle,
tileMode,
);
final paint = Paint();
paint.style = PaintingStyle.fill;
paint.isAntiAlias = true;
_addFill(paint);
if (gradientBox != null) {
_currentDrawing!.fill!.shader = gradient.createShader(gradientBox);
} else {
_currentDrawing!.gradient = gradient;
}
return this;
}