Adjust color slider with min and max

[bjarnef]

Description

Besides #1149 this also adjust color slider, when setting min and max to different that defaults for opacity slider.

E.g. a color slider allowing value within range 0-50 or 50-100. The range from 50-100 behaves a bit strange at handle stops as 50% from left, where it is expected left position should be 0%, but with 50 as value.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (minor updates related to the tooling or maintenance of the repository, does not impact compiled assets)

Motivation and context

How to test?

Screenshots (if appropriate)

Checklist

• If my change requires a change to the documentation, I have updated the documentation in this pull request.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[github-actions]

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[Copilot]

Pull Request Overview

This PR adjusts the color slider component to properly handle min and max values for opacity sliders, fixing a bug where opacity gradients were not respecting these boundaries.

• Updates the opacity gradient calculation to use RGB values and respect max values
• Adds new story examples to demonstrate min and max functionality for opacity sliders
• Refactors gradient styling to use CSS custom properties for better maintainability

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
uui-color-slider.story.ts	Adds new story examples for hue slider and opacity sliders with min/max constraints
uui-color-slider.element.ts	Updates opacity gradient calculation to use RGB values and respect max property, refactors to use CSS custom properties

Comments suppressed due to low confidence (1)

packages/uui-color-slider/lib/uui-color-slider.element.ts:133

• The variable name 'hueColor' is misleading as this is actually calculating an opacity gradient, not a hue-related color. Consider renaming to 'opacityGradient' for clarity.

        const hueColor =

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[bjarnef]

@iOvergaard I have seen some libraries separating these - or having a base slider and "alpha", "hue" slider extending the base color slider, similar to boolean input.

It may make sense as e.g. with "hue" slider is doesn't make much sense to change "min" (0) and "max" (360) values.

In Fluent UI it has a separate component for "alpha" slider, while another "color" slider has a property "channel" = hue, saturation etc,
https://react.fluentui.dev/?path=/docs/components-colorpicker--docs#alpha-slider-default

Something to consider.