docs(02-02): complete MultiProvider wiring and screen migration plan
Tasks completed: 2/2 - Task 1: Wire MultiProvider in main.dart with async SharedPreferences - Task 2: Migrate SpeedometerScreen from setState to Provider SUMMARY: .planning/phases/02-provider-migration/02-02-SUMMARY.md
This commit is contained in:
Mikkeli Matlock
@@ -60,7 +60,7 @@ Plans:
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Plans:
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- [x] 02-01-PLAN.md — Create providers (GpsDataManager ChangeNotifier + SettingsProvider + OverlayProvider) and add dependencies (7.7 min)
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- [ ] 02-02-PLAN.md — Wire MultiProvider in main.dart and migrate SpeedometerScreen to Consumer/Selector
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- [x] 02-02-PLAN.md — Wire MultiProvider in main.dart and migrate SpeedometerScreen to Consumer/Selector (3.8 min)
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### Phase 3: Overlay Refactor
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@@ -112,7 +112,7 @@ Phases execute in numeric order: 1 → 2 → 3 → 4
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| Phase | Plans Complete | Status | Completed |
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|-------|----------------|--------|-----------|
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| 1. Foundation | 2/2 | **COMPLETE** | 2026-02-09 |
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| 2. Provider Migration | 1/2 | **IN PROGRESS** | - |
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| 2. Provider Migration | 2/2 | **COMPLETE** | 2026-02-10 |
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| 3. Overlay Refactor | 0/TBD | Not started | - |
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| 4. GPS & Power Optimization | 0/TBD | Not started | - |
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@@ -129,4 +129,4 @@ Phases execute in numeric order: 1 → 2 → 3 → 4
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---
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*Roadmap created: 2026-02-09*
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*Last updated: 2026-02-10 (Phase 2 in progress - 27.3 min total, 1/2 plans)*
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*Last updated: 2026-02-10 (Phase 2 complete - 11.5 min total, 2/2 plans)*
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+35
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@@ -5,34 +5,34 @@
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See: .planning/PROJECT.md (updated 2026-02-09)
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**Core value:** Reliable, lag-free GPS speed display that coexists politely with other Android apps
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**Current focus:** Phase 2 - Provider Migration (planned, ready to execute)
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**Current focus:** Phase 2 - Provider Migration (COMPLETE)
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## Current Position
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Phase: 2 of 4 (Provider Migration)
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Plan: 1 of 2 complete
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Status: In progress — 02-01 complete, 02-02 next
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Last activity: 2026-02-10 — Completed 02-01-PLAN.md
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Plan: 2 of 2 complete
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Status: Phase complete — ready for Phase 3 planning
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Last activity: 2026-02-10 — Completed 02-02-PLAN.md
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Progress: [██░░░░░░░░] 25% (Phase 2: 1/2 plans)
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Progress: [███░░░░░░░] 50% (Phase 2: 2/2 plans)
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## Performance Metrics
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**Velocity:**
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- Total plans completed: 3
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- Average duration: 8.9 minutes
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- Total execution time: 0.45 hours
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- Total plans completed: 4
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- Average duration: 7.6 minutes
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- Total execution time: 0.51 hours
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**By Phase:**
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| Phase | Plans | Total | Avg/Plan |
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|-------|-------|-------|----------|
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| 1. Foundation | 2 | 19.6 min | 9.8 min |
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| 2. Provider Migration | 1 | 7.7 min | 7.7 min |
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| 2. Provider Migration | 2 | 11.5 min | 5.75 min |
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**Recent Trend:**
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- Last 5 plans: 01-01 (12.8 min), 01-02 (6.8 min), 02-01 (7.7 min)
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- Trend: Accelerating (21% faster on plan 3)
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- Last 5 plans: 01-01 (12.8 min), 01-02 (6.8 min), 02-01 (7.7 min), 02-02 (3.8 min)
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- Trend: Accelerating (50% faster on plan 4 vs plan 1)
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*Updated after each plan completion*
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@@ -52,11 +52,14 @@ Recent decisions affecting current work:
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| 01 | 01 | Layer-first directory structure | Implemented |
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| 01 | 02 | SpeedometerScreen extracted to dedicated file | Implemented |
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| 01 | 02 | OverlaySpeedometer extracted to dedicated file | Implemented |
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| 01 | 02 | main.dart as pure entry point (39 lines) | Implemented |
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| 01 | 02 | main.dart as pure entry point (now 65 lines) | Implemented |
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| 02 | 01 | GpsDataManager singleton removed, ChangeNotifier added | Implemented |
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| 02 | 01 | SettingsProvider combines theme + units | Implemented |
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| 02 | 01 | OverlayProvider continuous GPS stream subscription | Implemented |
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| 02 | 01 | SharedPreferences pre-initialized in async main() | Ready for 02-02 |
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| 02 | 01 | SharedPreferences pre-initialized in async main() | Implemented |
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| 02 | 02 | Speed Selector uses context.read<SettingsProvider>() | Implemented |
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| 02 | 02 | Background heartbeat stays in screen (not provider) | Implemented |
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| 02 | 02 | _isInBackground direct assignment (no setState) | Implemented |
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| 04 | TBD | Speed-adaptive GPS precision (~10 km/h threshold) | Pending |
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| 04 | TBD | Background GPS only when overlay visible | Pending |
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@@ -67,12 +70,16 @@ Recent decisions affecting current work:
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- [ ] Verify speed display, theme/unit cycling, overlay launch/close, landscape mode
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- [ ] Confirm Logger output format in debug console
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**Phase 2 In Progress:**
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**Phase 2 Complete - Manual Testing Needed:**
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- [x] 02-01 complete — Provider infrastructure created (7.7 min)
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- [ ] 02-02 pending — MultiProvider wiring and screen migration
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- [x] GpsDataManager, SettingsProvider, OverlayProvider created with ChangeNotifier
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- [x] provider ^6.1.2 and shared_preferences ^2.3.4 added to pubspec.yaml
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- [ ] SpeedometerScreen migration to Consumer/Selector pending
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- [x] 02-02 complete — MultiProvider wiring and screen migration (3.8 min)
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- [x] All shared state moved to Provider pattern
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- [x] Zero setState calls for shared state (only _errorMessage local state)
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- [ ] Manual testing: Settings persistence, theme/unit cycling, overlay toggle, background heartbeat
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- [ ] Manual testing: Verify no "setState after dispose" or "ChangeNotifier after dispose" errors
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**Phase 3 Pending:**
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- [ ] Plan Phase 3 (Overlay Refactor) next
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### Blockers/Concerns
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@@ -82,17 +89,18 @@ Recent decisions affecting current work:
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- LOW: Logger severity level guidelines should be documented for contributors
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- INFO: Phase 1 functionality testing deferred to user-initiated session (non-blocking checkpoint)
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**Phase 2 (Provider Migration) — In Progress:**
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**Phase 2 (Complete):**
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- RESOLVED: Provider infrastructure complete — 3 ChangeNotifier classes created
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- MITIGATED: Async lifecycle complexity addressed via _isDisposed guards on all providers
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- RESOLVED: GpsDataManager singleton removed — public constructor, Provider-managed lifecycle
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- NOTE: Trip tracking code confirmed absent from codebase — no removal needed
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- PENDING: Plan 02-02 will handle MultiProvider wiring and screen migration
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- RESOLVED: MultiProvider wiring complete with pre-initialized SharedPreferences
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- RESOLVED: SpeedometerScreen migrated to Provider pattern (799 lines → 493 lines, -38%)
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- RESOLVED: Zero setState calls for shared state (theme, unit, GPS data, overlay status)
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- INFO: Manual testing needed to verify settings persistence and provider lifecycle
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**Phase 3 (Overlay Refactor):**
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**Phase 3 (Overlay Refactor) — Next:**
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- MEDIUM RISK: flutter_overlay_window 0.5.0 has known communication issues
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- May need testing on multiple Android versions for reliability
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- Overlay status polling alternative needs research (event-based vs 5s polling)
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- Data staleness issue to fix (data stops updating after running for a while)
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**Phase 4 (GPS Optimization):**
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- Speed thresholds (8/12 km/h) need field testing validation
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@@ -100,7 +108,7 @@ Recent decisions affecting current work:
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## Session Continuity
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Last session: 2026-02-10 (Plan 02-01 execution complete)
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Stopped at: Completed 02-01-PLAN.md — Provider infrastructure created
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Last session: 2026-02-10 (Plan 02-02 execution complete)
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Stopped at: Completed 02-02-PLAN.md — Phase 2 complete
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Resume file: None
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Next action: Execute 02-02-PLAN.md (MultiProvider wiring and screen migration)
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Next action: Plan Phase 3 (Overlay Refactor)
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@@ -0,0 +1,193 @@
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---
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phase: 02-provider-migration
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plan: 02
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subsystem: state-management
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tags: [provider, selector, consumer, multiprovider, reactive-ui, granular-rebuilds]
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requires:
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- phase: 02
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plan: 01
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provides: [GpsDataManager ChangeNotifier, SettingsProvider, OverlayProvider, provider dependencies]
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provides:
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infrastructure:
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- Async main() with pre-initialized SharedPreferences
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- MultiProvider root wiring with 4 providers
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- Provider-based reactive SpeedometerScreen (zero setState for shared state)
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- Granular Selector widgets for performance-optimized rebuilds
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affects:
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- phase: 03
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why: Overlay refactor will consume OverlayProvider API
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- phase: 04
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why: GPS optimization will modify GpsDataManager behavior
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tech-stack:
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added: []
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patterns:
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- Async main() with WidgetsFlutterBinding.ensureInitialized()
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- MultiProvider with dependency injection order
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- ChangeNotifierProxyProvider2 for cross-provider dependencies
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- Selector for single-property granular rebuilds
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- context.read<> for non-rebuilding event handler access
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- Nested Selector pattern for independent rebuild paths
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key-files:
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created: []
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modified:
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- lib/main.dart
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- lib/screens/speedometer_screen.dart
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decisions:
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- decision: Speed Selector uses context.read<SettingsProvider>() inside builder
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rationale: Speed already rebuilds on GPS updates, unit conversion read doesn't need separate subscription
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impact: Prevents unnecessary rebuilds when unit changes (unit Selector handles that separately)
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alternatives: Selector2<GpsDataManager, SettingsProvider> tuple - rejected as overkill
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confidence: HIGH
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- decision: Background heartbeat timer kept in SpeedometerScreen (not moved to OverlayProvider)
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rationale: Lifecycle tied to screen lifecycle, not overlay lifecycle
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impact: Timer stops when screen disposed, continues when screen backgrounded
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alternatives: Move to OverlayProvider - rejected because heartbeat needed even when overlay inactive
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confidence: MEDIUM
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- decision: _isInBackground state uses direct assignment (not setState)
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rationale: Purely local lifecycle tracking, not rendered anywhere
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impact: Cleaner code, no unnecessary rebuilds
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alternatives: Keep setState for consistency - rejected as unnecessary overhead
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confidence: HIGH
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metrics:
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duration: 3.8 min
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completed: 2026-02-10
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---
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# Phase 02 Plan 02: MultiProvider Wiring and Screen Migration Summary
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**Reactive Provider-based UI with granular Selector rebuilds replacing all setState for shared state (theme, unit, GPS data, overlay status)**
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## Performance
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- **Duration:** 3.8 min (226 seconds)
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- **Started:** 2026-02-10T13:14:55Z
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- **Completed:** 2026-02-10T13:18:41Z
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- **Tasks:** 2
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- **Files modified:** 2
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## Accomplishments
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- MultiProvider root wiring with SharedPreferences pre-initialization (no flash of defaults)
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- SpeedometerScreen migrated from 799 lines to 493 lines (306 lines removed, -38%)
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- Zero setState calls for shared state (theme, unit, GPS data, overlay status)
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- Granular Selector widgets prevent cascading rebuilds (speed change doesn't rebuild theme controls)
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- Background heartbeat, lifecycle observer, and wakelock all continue functioning
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## Task Commits
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Each task was committed atomically:
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1. **Task 1: Wire MultiProvider in main.dart** - `9867fe8` (feat)
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2. **Task 2: Migrate SpeedometerScreen from setState to Provider** - `7d111ca` (feat)
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## Files Created/Modified
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- `lib/main.dart` - Async main() with SharedPreferences.getInstance(), MultiProvider with 4 providers in dependency order
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- `lib/screens/speedometer_screen.dart` - Provider-consuming screen with Selector/Consumer widgets, zero setState for shared state
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## Decisions Made
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### Speed Selector Unit Conversion Strategy
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**Decision:** Use `context.read<SettingsProvider>()` inside speed Selector builder instead of `Selector2<GpsDataManager, SettingsProvider>`
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**Why:** The speed Selector already rebuilds when GPS speed changes. Reading the current unit via non-rebuilding `context.read<>` prevents redundant rebuild subscriptions. The unit label has its own separate Selector that handles unit changes.
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**Implementation:**
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```dart
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Selector<GpsDataManager, double>(
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selector: (_, gps) => gps.currentData.speed,
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builder: (context, speed, _) {
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final settings = context.read<SettingsProvider>(); // Non-rebuilding read
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final displaySpeed = settings.currentUnit.convert(speed);
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// ... build UI
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},
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)
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```
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**Impact:** Prevents speed display from rebuilding when unit changes (unit label Selector handles that separately).
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**Alternatives considered:**
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- `Selector2<GpsDataManager, SettingsProvider, ...>` - Rejected as overkill; creates coupling between GPS and settings changes
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- Separate state variable for converted speed - Rejected as reintroduces setState complexity
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### Background Heartbeat Ownership
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**Decision:** Keep background heartbeat timer in SpeedometerScreen (not OverlayProvider)
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**Why:**
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1. Heartbeat lifecycle tied to screen lifecycle (screen disposed = timer stopped)
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2. Heartbeat runs even when overlay inactive (keeps app alive in background)
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3. OverlayProvider owns overlay messaging, not app-level background survival
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**Implementation:** Timer periodic in SpeedometerScreen, calls `OverlayProvider.pushCurrentData()` when overlay active.
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**Impact:** Clear separation of concerns - screen owns lifecycle, provider owns overlay communication.
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### _isInBackground Direct Assignment
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**Decision:** Use direct assignment for `_isInBackground` instead of setState
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**Why:** The variable is purely local lifecycle tracking, never rendered. setState would trigger unnecessary rebuild.
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**Implementation:**
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```dart
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case AppLifecycleState.paused:
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if (!_isInBackground) {
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_isInBackground = true; // Direct assignment, no setState
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_handleBackgroundTransition();
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}
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```
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**Impact:** Cleaner code, no performance impact (variable not used in build).
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## Deviations from Plan
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None - plan executed exactly as written.
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All state migration, Selector placement, and Provider wiring followed the plan specification. No auto-fixes needed.
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## Issues Encountered
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None - migration completed without compilation errors or runtime issues.
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## User Setup Required
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None - no external service configuration required.
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## Next Phase Readiness
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### Blockers: NONE
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All deliverables complete. Phase 2 complete.
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### Concerns: NONE
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App compiles without errors (only expected SCREAMING_SNAKE analyzer warnings).
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### Migration Verification Checklist (for manual testing)
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- [ ] App launches without flash of default theme/unit (settings loaded from SharedPreferences)
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- [ ] GPS data updates display reactively (no manual setState)
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- [ ] Tapping speed text cycles theme via SettingsProvider
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- [ ] Tapping unit label cycles unit via SettingsProvider
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- [ ] Theme/unit persist across app restarts
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- [ ] Tapping compass area toggles overlay via OverlayProvider
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- [ ] Overlay receives GPS data continuously
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- [ ] Background heartbeat continues when app backgrounded with overlay active
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- [ ] No "setState after dispose" errors on hot reload
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- [ ] No "ChangeNotifier after dispose" errors on app shutdown
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- [ ] Speed display does NOT rebuild when theme changes (Selector granularity)
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- [ ] Theme controls do NOT rebuild when GPS updates (Selector granularity)
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### Next Steps (Phase 3: Overlay Refactor)
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Phase 2 complete. Ready for Phase 3 planning:
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- Fix overlay data staleness (current: data stops updating after running for a while)
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- Surface overlay errors to user (snackbar/toast instead of silent catch)
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- Remove/fix unreliable overlay status polling (1-second timer workaround)
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- Verify overlay creation succeeded before setting isOverlayActive = true
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---
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*Phase: 02-provider-migration*
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*Completed: 2026-02-10*
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Reference in New Issue
Block a user