Kyle Isom
5eeedff464
- UndoableAction interface with AddStrokeAction and DeleteStrokeAction - UndoManager: undo/redo stacks (depth 50), canUndo/canRedo StateFlows - EditorViewModel: stroke operations routed through UndoManager, visual callbacks sync canvas view without full DB reload - Toolbar: undo/redo buttons with enabled state - 9 unit tests for UndoManager Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
96 lines
4.5 KiB
Markdown
96 lines
4.5 KiB
Markdown
# PROGRESS.md — eng-pad Implementation Progress
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This file tracks completed work and decisions. Updated after every step.
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See PROJECT_PLAN.md for the full step list.
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## Completed
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### Phase 0: Project Documents (2026-03-24)
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- [x] 0.1: Created DESIGN.md — full technical design covering architecture,
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data model, coordinate system, rendering, input handling, and source tree.
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- [x] 0.2: Created PROJECT_PLAN.md — discrete steps grouped by phase with
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checkboxes and file references.
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- [x] 0.3: Created PROGRESS.md — this file.
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- [x] 0.4: Updated CLAUDE.md — build commands, source tree, project doc
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pointers.
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### Phase 1: Project Skeleton + Data Layer (2026-03-24)
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- [x] 1.1: Generated Android project — Gradle 8.14.2, AGP 8.10.1, Kotlin 2.1.20
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- [x] 1.2: Version catalog with Compose BOM 2026.03.00, Room 2.8.4,
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Navigation 2.9.7, Lifecycle 2.10.0
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- [x] 1.3: Lint configured — warningsAsErrors, AGP version check suppressed
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(AGP 9.x needs Gradle 9.x)
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- [x] 1.4: Room entities: Notebook, Page, Stroke, PageSize enum
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- [x] 1.5: Converters: FloatArray ↔ ByteArray (packed little-endian)
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- [x] 1.6: DAOs: NotebookDao, PageDao, StrokeDao
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- [x] 1.7: EngPadDatabase (Room, version 1)
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- [x] 1.8: NotebookRepository, PageRepository
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- [x] 1.9: Unit tests: StrokeBlobTest (6 tests), PageSizeTest (4 tests) — all pass
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- Foojay resolver added for automatic JDK toolchain download
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- compileSdk/targetSdk bumped to 36 (required by latest androidx dependencies)
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### Phase 2: Notebook List Screen (2026-03-24)
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- [x] 2.1: MainActivity with Compose NavHost (three routes: notebooks, pages, editor)
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- [x] 2.2: NotebookListViewModel with StateFlow, create/delete operations
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- [x] 2.3: NotebookListScreen — lazy list, create dialog (title + page size radio),
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long-press delete with confirmation, empty state
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- [x] 2.4: Auto-create page 1 in NotebookRepository.create()
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- [x] 2.5: Navigation wired — tap notebook → pages stub, editor stub
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- EngPadTheme: high-contrast light color scheme (black on white for e-ink)
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### Phase 3: Canvas — Basic Drawing (2026-03-24)
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- [x] 3.1–3.4: PadCanvasView — stylus input with historical points, Path/Paint
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stroke rendering, backing bitmap at 1/4 resolution, 60pt grid, Matrix
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coordinate transform (canonical ↔ screen)
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- [x] 3.5: CanvasState — tool enum (PEN_FINE, PEN_MEDIUM, ERASER, SELECT),
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zoom/pan state, pen width constants (4.49pt, 5.91pt)
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- [x] 3.6: EditorViewModel — loads strokes from Room, saves on completion
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- [x] 3.7: EditorScreen + Toolbar — Compose wrapper with AndroidView,
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FilterChip toolbar for pen size and eraser selection
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- [x] 3.8: NavGraph updated — pages route auto-navigates to first page's editor,
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page size passed through route params
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- Used KTX Canvas extensions (withMatrix, withScale, createBitmap) per lint
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- ClickableViewAccessibility suppressed on PadCanvasView (drawing view)
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### Phase 4: Zoom and Pan (2026-03-24)
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- [x] 4.1: ScaleGestureDetector with focal-point zoom (0.5×–4×)
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- [x] 4.2: Finger drag for pan with multi-pointer tracking (handles finger
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swaps during pinch gestures)
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- [x] 4.3: Input routing by tool type already in place from Phase 3
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- Zoom/pan state managed locally in PadCanvasView for responsiveness,
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synced to ViewModel on gesture end
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### Phase 5: Eraser (2026-03-24)
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- [x] 5.1–5.3: Stroke-level eraser with bounding box hit test (42pt radius),
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processes historical touch points for thorough erasing, deletes from
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view + Room DB, rebuilds backing bitmap
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### Phase 6: Undo/Redo (2026-03-24)
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- [x] 6.1: UndoableAction interface, AddStrokeAction, DeleteStrokeAction
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- [x] 6.2: UndoManager with undo/redo stacks (depth 50), StateFlow for canUndo/canRedo
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- [x] 6.3: EditorViewModel rewired — stroke add/delete go through UndoManager,
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visual callbacks sync canvas view without full reload
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- [x] 6.4: 9 unit tests for UndoManager (perform, undo, redo, depth limit, clear, no-ops)
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- Toolbar now has undo/redo buttons with enabled state
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## In Progress
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Phase 7: Selection
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## Decisions & Deviations
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- **Language**: Kotlin (chosen over Java for better Compose/coroutine support).
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- **Storage**: Room/SQLite with packed float BLOBs for stroke points.
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- **Palm rejection**: Hardware only (EMR digitizer handles it).
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- **Pressure sensitivity**: None — two fixed pen sizes (0.38mm, 0.5mm).
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- **Coordinate system**: 300 DPI canonical points (scaled to 72 DPI for PDF export).
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- **UI framework**: Compose for chrome, custom View for canvas (Compose
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Canvas lacks MotionEvent access needed for stylus input).
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