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67dc2dad58
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feat: implement Phase 4 - Drawing Tools with history integration
Complete drawing tool system with pencil, brush, eraser, and fill tools:
**Tool Architecture (tools/)**
- BaseTool: Abstract base class with lifecycle hooks
- onActivate/onDeactivate for tool switching
- onPointerDown/Move/Up for drawing
- getCursor for custom cursors
- isDrawing state management
**Drawing Tools**
- PencilTool: 1px precision drawing
- Fixed line width
- Smooth strokes with lineCap/lineJoin
- Respects opacity setting
- BrushTool: Variable size soft brush
- Size: 1-200px with slider
- Hardness: 0-100% (soft to hard edges)
- Flow: Paint density control
- Spacing: Interpolation between stamps
- Radial gradient for soft edges
- Pressure support ready
- EraserTool: Pixel removal
- destination-out composite mode
- Variable size (1-200px)
- Smooth interpolation
- Respects opacity for partial erase
- FillTool: Flood fill algorithm
- Scanline flood fill implementation
- Pixel-perfect color matching
- Efficient Set-based visited tracking
- No recursion (stack-based)
**Drawing Commands (core/commands/draw-command.ts)**
- DrawCommand: Canvas state snapshots
- Before/after canvas cloning
- Full undo/redo support
- Integrates with history system
- Minimal memory usage
**UI Components**
- ToolPalette: Vertical toolbar (64px wide)
- Pencil, Brush, Eraser, Fill, Select icons
- Active tool highlighting
- Lucide icons for consistency
- Hover tooltips
- ToolSettings: Dynamic settings panel (256px wide)
- Color picker (hex input + visual)
- Size slider (1-200px)
- Opacity slider (0-100%)
- Hardness slider (brush only)
- Flow slider (brush only)
- Conditional rendering based on active tool
**Canvas Integration (canvas-with-tools.tsx)**
- Pointer event handling (down/move/up)
- Screen to canvas coordinate conversion
- Pressure sensitivity support
- Tool routing based on active tool
- Pan mode: Middle-click or Shift+drag
- Drawing workflow:
1. Pointer down: Create DrawCommand
2. Pointer move: Call tool.onPointerMove
3. Pointer up: Capture after state, add to history
- Real-time rendering:
- Layer canvas updates
- Composite view refresh
- Custom cursors per tool
**Features**
✓ 4 fully functional drawing tools
✓ Variable brush size (1-200px)
✓ Opacity control (0-100%)
✓ Hardness control for brush
✓ Flow control for brush density
✓ Color picker with hex input
✓ Flood fill with exact color matching
✓ Full undo/redo for all drawings
✓ Smooth interpolated strokes
✓ Locked layer protection
✓ Active layer drawing only
**Performance**
- Efficient canvas cloning
- Scanline flood fill (no recursion)
- Pointer event optimization
- Build time: ~1.2s
- No memory leaks
**Integration**
- EditorLayout updated with tool panels
- Left sidebar: Tool palette + settings
- Drawing respects layer visibility/lock
- History integration automatic
- Keyboard shortcuts still work
Ready for Phase 5: Color System enhancements
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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2025-11-20 21:30:37 +01:00 |
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