Interactive Control Spacing System
Component Detail
Description
Enforces token-defined minimum spacing between adjacent interactive controls to prevent mis-taps in dense form layouts. Provides a layout widget that automatically inserts accessibility-compliant gaps between tappable siblings.
interactive-control-spacing-system
Summaries
The Interactive Control Spacing System prevents accidental taps on wrong buttons or form controls in densely packed mobile interfaces, directly reducing user errors and support costs. In applications used for data entry or high-stakes actions, mis-taps cause incorrect submissions, frustration, and erosion of user trust. By automatically enforcing minimum spacing between interactive elements, the app meets accessibility guidelines and delivers a more reliable, premium experience that differentiates the product in competitive app store rankings. Fewer input errors also means lower customer support volume and improved net promoter scores — measurable business outcomes tied to a single infrastructure investment.
This is a low-complexity mobile component with a single dependency on design-token-provider, making it one of the lower-risk deliverables in the accessibility system and a candidate for an early sprint. It provides AccessibleControlRow and AccessibleControlColumn layout widgets that feature teams can adopt incrementally. Testing should cover portrait and landscape orientations and verify that minimum gap values cannot be locally overridden by feature widget styles. Integration with the touch-target-wrapper component is required for full compound accessibility compliance — coordinate scheduling accordingly.
The primary delivery risk is adoption: teams may default to raw Row/Column widgets, so enforcement via code review checklists and linter rules should be established at kickoff.
Provides two layout widgets — `AccessibleControlRow` and `AccessibleControlColumn` — each accepting a `List
To prevent bypass, the gap resolution logic must always prefer the token value when it exceeds the caller-supplied minGap — document this invariant clearly. Combine with touch-target-wrapper in all form layouts for holistic tap-area compliance and a single audit surface.
Responsibilities
- Insert minimum spacing between adjacent interactive controls
- Apply token-defined gap values that cannot be overridden by local styles
- Support vertical and horizontal layouts with consistent spacing
- Integrate with the touch target wrapper for compound compliance
Interfaces
AccessibleControlRow({List<Widget> controls, double minGap})
AccessibleControlColumn({List<Widget> controls, double minGap})
resolveMinimumGap() → double
validateSpacing(double gap) → bool