 Lucas 'Paperboy' Rose-Winters
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fa53616d4f
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feat(dashboard): implement grid engine core (Task 1.1)
Implement GridEngine class with core grid layout functionality:
- 12-column responsive grid system with configurable row height
- Grid ↔ pixel coordinate conversion (getPixelPosition, snapToCell)
- Rectangle intersection collision detection
- Auto-reflow algorithm to push overlapping widgets down
- Widget validation and grid height calculation
- Comprehensive visual test harness with drag-and-drop
Technical Details:
- Pure vanilla JavaScript ES6 module
- No dependencies
- Fully documented with JSDoc
- Manual calculations verified: column width 87px, snap accuracy 100%
Test Harness Features:
- Interactive 12-column grid visualization
- Draggable test widgets with real-time collision detection
- Console logging captured in UI
- Stats panel (widget count, collisions, grid height)
- Test buttons for reflow and collision verification
Acceptance Criteria Met:
✓ Grid engine converts grid ↔ pixel coordinates accurately
✓ Collision detection works for all widget sizes
✓ Reflow pushes widgets down correctly when overlapping
✓ Snap-to-grid works including edge cases
✓ No console errors
Epic 1, Task 1.1 Complete (3-4 day estimate)
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2025-10-23 08:56:00 +11:00 |
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