## Interactive Demo

Field Strength
Selection Mode
Actions
Field Visualization

#### Selected Options:

- None selected

Keyboard Controls: Tab to navigate particles, Space to toggle selection, Arrow keys to move selected particle, Shift+Arrow for fine control

## Traditional vs Innovation

### Traditional Checkboxes

Option 1 Option 2 Option 3 Option 4 Option 5

### Magnetic Field Selection

The demo above shows the innovative magnetic field approach where:

- Options are magnetic particles with poles
- Selection uses magnetic attraction
- Visual field lines show forces
- Physics simulation creates natural interactions

## Design Documentation

### Interaction Model

The MagneticField Selection interface transforms checkbox and radio button selection into a physics-based magnetic field interaction:

- Magnetic Particles: Each option is represented as a magnetic particle with north (red) and south (blue) poles
- Selection Poles: Fixed magnetic poles attract or repel particles based on polarity
- Drag Interaction: Users can drag particles through the magnetic field, feeling the forces
- Attraction Selection: When particles are attracted to selection poles, they become selected
- Field Visualization: Optional magnetic field lines show the invisible forces at play
- Multi-Select: Multiple particles can cluster around attraction poles for multi-selection

### Technical Implementation

This component leverages native web technologies to create a realistic magnetic field simulation:

- Canvas API: Renders magnetic field lines using mathematical field equations
- Physics Engine: Custom JavaScript physics simulation for magnetic forces
- Drag & Drop: Native pointer events for smooth particle manipulation
- RequestAnimationFrame: 60fps animation loop for fluid motion
- CSS Transforms: Hardware-accelerated particle movement
- Inverse Square Law: Realistic magnetic force calculations based on distance

### Accessibility Features

Despite the visual nature, the component maintains full accessibility:

- Keyboard Navigation: Tab through particles, Space to select, Arrow keys to move
- Screen Reader Support: ARIA labels and live regions announce selections
- Focus Indicators: Clear visual focus states for keyboard users
- Alternative Input: Works with mouse, touch, and keyboard equally well
- High Contrast: Strong color differentiation between poles
- Motion Control: Respects prefers-reduced-motion settings

### Evolution Opportunities

Future enhancements could expand the magnetic metaphor:

- Electromagnetic Fields: Add electrical fields for more complex interactions
- Field Shaping: User-drawn field lines to create custom selection patterns
- Quantum States: Particles in superposition for probabilistic selection
- 3D Fields: WebGL-based 3D magnetic field visualization
- Haptic Feedback: Vibration API for feeling magnetic forces
- Group Dynamics: Particles that influence each other's selection state