Purpose
The Scanner Screen provides a camera interface for scanning barcodes. It supports both single-scan and continuous-scan modes.
Widgets
- Camera Preview: Full-screen camera view using `mobile_scanner`.
- Overlay Guide: A box frame indicating the scan area.
- Instruction Text: Displays mode specific instructions (“Scan a barcode” or “Continuous Mode”).
- AppBar Actions: “Done” button (only in Continuous mode) to return to the previous screen.
Logic & Debounce
- Debounce: Prevents duplicate scans of the same barcode within a 2-second window.
- Continuous Mode: Keeps the camera open to scan multiple items sequentially.
- Single Mode: Returns the result immediately after the first successful scan.
Interactions
- Scan: Auto-detects barcode when in frame.
- Done: Manually close the scanner (Continuous mode).
