Bottom-Side Component Placement - Implementation Walkthrough¶
✅ Feature Complete¶
Components can now be placed on either the top (F.Cu) or bottom (B.Cu) side of the PCB.
What Was Built¶
Files Modified¶
| File | Changes |
|---|---|
| ComponentNode.tsx | Added side toggle + visual indicators |
| BoardCanvas.tsx | Added handleToggleSide + pass side to nodes |
Features¶
User Interaction¶
- Double-click component → flips between top/bottom
- Single-click component → rotates 90°
- Drag component → repositions
Visual Indicators (Bottom-Side)¶
| Indicator | Description |
|---|---|
| 🔵 Blue tint | Semi-transparent overlay |
| "B" badge | Bottom-left corner |
| Dashed border | Blue dashed instead of solid |
Top-Side (Default)¶
- No tint (standard component color)
- No badge
- Solid border (gray/green/red)
How It Works¶
Data Flow¶
- User double-clicks component
handleToggleSidetogglessidefield ('top' ↔ 'bottom')- Node data updated with new side
- ComponentNode re-renders with visual indicators
- Changes propagated to ComponentPlacement on save
KiCAD Export¶
The side field is already part of ComponentPlacement and is sent to backend:
- side: 'top' → F.Cu layer
- side: 'bottom' → B.Cu layer
Testing¶
Manual Test Cases¶
- ✅ Double-click component → flips to bottom (blue tint + "B")
- ✅ Double-click again → flips back to top (normal appearance)
- ✅ Rotate bottom-side component → maintains bottom state
- ✅ Drag bottom-side component → maintains bottom state
- ✅ Save layout → side preserved
- ✅ Export to KiCAD → bottom components on B.Cu
Visual Examples¶
Top-Side Component: - Standard color with solid border - No overlay or badge
Bottom-Side Component: - Blue semi-transparent overlay - Blue "B" badge (bottom-left) - Blue dashed border
Future Enhancements (Optional)¶
- Preview flip-view (mirror entire board)
- Layer visibility toggle (show/hide bottom)
- Different colors for top vs bottom by default
- Bottom-side collision detection (separate layer)
Generated on 2026-01-16 | Magic PCB AI