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Description:

gradients

gradients #
Implementations of Flutter's [LinearGradient], [RadialGradient], and
[SweepGradient] with support for the CMYK, HSI, HSL, HSP, HSB, LAB, Oklab,
RGB, and XYZ color spaces.
gradients depends on and exposes the flutter_color_models package.
See: flutter_palette,
a package for generating color palettes.
Usage #
import 'package:gradients/gradients.dart';
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The 3 classes in gradients can be used interchangeably with Flutter's
[Gradient]s: [LinearGradientPainter], [RadialGradientPainter], and
[SweepGradientPainter].
final colors = <Color>[Colors.lime, Colors.pink, Colors.cyan];
final linearGradient = LinearGradientPainter(colors: colors);
final radialGradient = RadialGradientPainter(colors: colors);
final sweepGradient = SweepGradientPainter(colors: colors);
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Like [Gradient]s, [GradientPainter]s can be provided to a [BoxDecoration],
or the [createShader] method can be used to paint directly to a [Canvas].
final widget = Container(
decoration: BoxDecoration(
gradient: LinearGradientPainter(
colors: <Color>[Colors.lime, Colors.pink, Colors.cyan],
),
),
);
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Color Spaces #
By default, [Color]s are interpolated in the RGB color space; A [colorSpace]
can be provided to set the color space colors will be interpolated in.
final colors = <Color>[Colors.lime, Colors.pink, Colors.cyan];
final oklabGradient = LinearGradientPainter(
colorSpace: ColorSpace.oklab,
colors: colors,
);
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Color Models #
However, if [ColorModel]s are utilized and no [colorSpace] is provided,
the gradient will be interpolated in the color space defined by the starting
color within any pair of colors.
final colors = <Color>[
RgbColor(0, 188, 212),
HsbColor(35, 100, 100),
OklabColor(0.9, -0.05, 0.033),
HspColor(175, 100, 50),
];

// This gradient will be interpolated in the RGB color space,
// then the HSB color space, then the Oklab color space.
final gradient = LinearGradientPainter(colors: colors);
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If [invert] is set to true, the gradient will be interpolated
in the color space defined by the ending color within any pair
of colors.
// This gradient will be interpolated in the HSB color space,
// then the Oklab color space, then the HSP color space.
final gradient = LinearGradientPainter(colors: colors, invert: true);
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Output #
Below is the same set of colors interpolated in each of the supported
color spaces.
final colors = <Color>[Colors.lime, Colors.pink, Colors.cyan];
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CMYK #
final gradient = LinearGradientPainter(
colors: colors, colorSpace: ColorSpace.cmyk);
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HSB #
final gradient = LinearGradientPainter(
colors: colors, colorSpace: ColorSpace.hsb);
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HSI #
final gradient = LinearGradientPainter(
colors: colors, colorSpace: ColorSpace.hsi);
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HSL #
final gradient = LinearGradientPainter(
colors: colors, colorSpace: ColorSpace.hsl);
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HSP #
final gradient = LinearGradientPainter(
colors: colors, colorSpace: ColorSpace.hsp);
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LAB #
final gradient = LinearGradientPainter(
colors: colors, colorSpace: ColorSpace.lab);
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Oklab #
final gradient = LinearGradientPainter(
colors: colors, colorSpace: ColorSpace.oklab);
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RGB #
final gradient = LinearGradientPainter(
colors: colors, colorSpace: ColorSpace.rgb);
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XYZ #
final gradient = LinearGradientPainter(
colors: colors, colorSpace: ColorSpace.xyz);
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