Files

Trey t 622a7b30df docs(04): capture phase context

Phase 04: Drag Interaction
- Implementation decisions documented
- Phase boundary established

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2026-01-18 16:26:28 -06:00

1.9 KiB

Raw Blame History

Phase 4: Drag Interaction - Context

Gathered: 2026-01-18 Status: Ready for planning

## Phase Boundary

User can drag itinerary items with proper visual feedback, animation, and constraint enforcement. Items include travel segments and custom items (games are not draggable). The system uses semantic positions (day, sortOrder) established in Phases 1-3.

## Implementation Decisions

Drag Feel & Weight

Quick & snappy lift — instant pop-up, light and responsive (iOS Reminders style)
1:1 finger tracking — item stays exactly under finger, no lag or smoothing
Immediate shuffle — items move instantly when drag crosses them (no delay threshold)
Subtle scale on lift (1.02-1.03x) — barely noticeable, just enough shadow change

Insertion Line Design

Color follows selected theme in Settings — respects user's theme choice
Fade in/out animation (~150ms opacity transition)
Plain line only — no glow, shadow, or endpoint embellishments

Invalid Drop Feedback

Red tint on dragged item while hovering over invalid zone
Quick spring snap-back animation (~200ms with slight overshoot)
Error haptic pattern (3 quick taps) — distinct "nope" feeling
No sound effects — haptic and visual feedback only

Claude's Discretion

Insertion line thickness (suggested 2-4pt)
Shadow depth and exact tilt angle during drag
Drop settle animation timing
Auto-scroll speed and dead zone sizing (user didn't discuss this area)
Line positioning relative to items

## Specific Ideas

Lift feel should match iOS Reminders — quick, light, responsive
Snap-back should have slight overshoot for spring physics feel
Theme-aware colors for insertion line

## Deferred Ideas

None — discussion stayed within phase scope

Phase: 04-drag-interaction Context gathered: 2026-01-18

1.9 KiB Raw Blame History