Implement LinearGradient

[Kyle-Ye]

Description

LinearGradient is a fundamental gradient type in SwiftUI that creates a gradient between colors along a linear axis. This is currently missing from OpenSwiftUI.

API Reference

SwiftUI's LinearGradient: https://developer.apple.com/documentation/swiftui/lineargradient

Expected API

struct LinearGradient: ShapeStyle, View {
    init(gradient: Gradient, startPoint: UnitPoint, endPoint: UnitPoint)
    init(colors: [Color], startPoint: UnitPoint, endPoint: UnitPoint)
    init(stops: [Gradient.Stop], startPoint: UnitPoint, endPoint: UnitPoint)
}

Use Case

Required for the AnimatedColorTimelineView example and many other gradient-based UI designs.

References

• Example usage commented out in: Example/SharedExample/Animation/Timeline/AnimatedColorTimelineView.swift

Priority

Medium - Common UI element for creating gradient backgrounds and fills