PharmaGO Packages #

Reusable Flutter components for pharmacy applications. This package provides generic, cross-platform widgets and utilities for barcode scanning and PDF generation.

Platform Support #

Platform-Specific Notes #

Windows

• Camera Scanner: Not supported. The mobile_scanner package does not support Windows desktop. Use the BarcodeKeyboardListenerWidget with an external USB barcode scanner instead.
• PDF: Fully supported with print preview capabilities.

Web

• Camera Scanner: Supported (requires HTTPS in production for camera access).
• External Keyboard Scanner: Works with USB barcode scanners that emulate keyboard input.
• PDF: Fully supported with browser print dialog.

macOS / Linux

• Camera Scanner: Not currently supported by mobile_scanner.
• External Keyboard Scanner: Fully supported.
• PDF: Fully supported.

Features #

Barcode Scanning #

• Camera-based scanning with customizable overlay and controls
• External keyboard/scanner support for USB barcode readers (Datalogic, Honeywell, etc.)
• Auto-focus and zoom controls
• Flash/torch support
• Configurable scan area with expand/collapse
• Beep sound feedback
• Cooldown between scans to prevent duplicate reads

PDF Generation #

• Custom headers with logo, app name, title, and subtitle
• KPI sections with Bootstrap-like grid system (col1-col12)
• Tables with customizable headers, body, and footers
• Charts: Bar (vertical/horizontal), Pie, and Line charts
• Custom footers with pagination
• Portrait and landscape page orientations
• Page limit protection with configurable max pages

Installation #

Add this package to your pubspec.yaml:

dependencies:
  pharmago_packages: ^1.0.0

Then run:

flutter pub get

Usage #

Barcode Scanner (Camera) #

import 'package:pharmago_packages/pharmago_packages.dart';

// Camera-based scanner (Android, iOS, Web)
BarcodeScannerWidget(
  onBarcodeDetected: (barcode) {
    print('Scanned: $barcode');
  },
  config: BarcodeScannerConfig(
    enableFlash: true,
    enableZoom: true,
    enableAutoFocus: true,
    scanIntervalSeconds: 2.0,
    permissionDeniedText: 'Camera permission is required',
    allowCameraText: 'Allow Camera',
  ),
)

Barcode Scanner (External Keyboard/USB Reader) #

import 'package:pharmago_packages/pharmago_packages.dart';

// External keyboard/scanner listener (all platforms)
BarcodeKeyboardListenerWidget(
  onBarcode: (barcode) {
    print('Scanned: $barcode');
  },
  config: BarcodeKeyboardListenerConfig(
    minBarcodeLength: 4,
    maxBarcodeLength: 13,
    numericOnly: true,
    activeText: 'External Reader Active',
    instructionText: 'Point the scanner at a barcode',
  ),
)

PDF Generation #

import 'package:pharmago_packages/pharmago_packages.dart';
import 'package:printing/printing.dart';

// Create a PDF builder
final pdfBuilder = PdfBuilder(
  config: PdfConfig.a4Portrait(),
  header: PdfHeaderConfig(
    title: 'Monthly Report',
    subtitle: 'January 2025 - Sales Summary',
    appName: 'MyApp',
  ),
  footer: const PdfFooterConfig(
    leftText: 'Generated by MyApp',
    showPageNumbers: true,
  ),
  maxPages: 500,
);

// Add KPI section
pdfBuilder.addSection(
  PdfKpiSection(
    order: 1,
    sectionTitle: 'Key Metrics',
    items: [
      const PdfKpiItem(
        title: 'Total Sales',
        value: '\$125,430.00',
        columnSpan: PdfColumnSpan.col6,
        trend: KpiTrend.positive,
        trendValue: '+12.5%',
      ),
      const PdfKpiItem(
        title: 'Units Sold',
        value: '3,847',
        columnSpan: PdfColumnSpan.col6,
        trend: KpiTrend.positive,
        trendValue: '+8.2%',
      ),
    ],
  ),
);

// Add Table section
pdfBuilder.addSection(
  PdfTableSection(
    order: 2,
    sectionTitle: 'Top Products',
    headers: [
      const PdfTableHeaderConfig(title: '#', flex: 1),
      const PdfTableHeaderConfig(title: 'Product', flex: 4),
      const PdfTableHeaderConfig(title: 'Qty', flex: 1, textAlign: pw.TextAlign.right),
    ],
    rows: [
      // Your table rows here
    ],
  ),
);

// Add Chart section
pdfBuilder.addSection(
  PdfChartSection(
    order: 3,
    sectionTitle: 'Sales Analytics',
    items: [
      PdfChartItem(
        columnSpan: PdfColumnSpan.col6,
        config: const PdfChartConfig(
          type: PdfChartType.barVertical,
          title: 'Monthly Sales',
          height: 180,
          dataPoints: [
            PdfChartDataPoint(label: 'Jan', value: 125430),
            PdfChartDataPoint(label: 'Feb', value: 98750),
            // ...
          ],
        ),
      ),
    ],
  ),
);

// Build and preview PDF
final result = await pdfBuilder.buildWithResult();
await Printing.layoutPdf(
  onLayout: (format) async => result.bytes,
  name: 'Report.pdf',
);

Platform-Specific Setup #

Android #

Add camera permission to android/app/src/main/AndroidManifest.xml:

<uses-permission android:name="android.permission.CAMERA" />

iOS #

Add camera usage description to ios/Runner/Info.plist:

<key>NSCameraUsageDescription</key>
<string>Camera access is required for barcode scanning</string>

Web #

For camera access on web, your app must be served over HTTPS in production. During development, localhost works without HTTPS.

Windows #

No special setup required. Note that camera-based barcode scanning is not available on Windows - use external USB barcode scanners with BarcodeKeyboardListenerWidget instead.

Known Limitations #

1. Camera Scanner on Windows/macOS/Linux: The mobile_scanner package does not support desktop platforms. Use BarcodeKeyboardListenerWidget with external USB scanners.

2. Web Camera: Requires HTTPS in production environments.

3. External Scanner on Web: Works with USB scanners that emulate keyboard input. Some advanced scanner features (like Datalogic broadcast) are not available on web.

Dependencies #

This package uses the following dependencies:

• mobile_scanner: Camera-based barcode scanning
• permission_handler: Camera permission handling
• audioplayers: Beep sound feedback
• device_info_plus: Device detection for performance optimization
• system_info_plus: RAM detection for adaptive settings
• pdf: PDF document generation
• printing: PDF preview and printing
• get: State management (optional)
• gap: UI spacing utilities

Example #

Check the /example folder for a complete demo application showcasing all features.

cd example
flutter run

Contributing #

Contributions are welcome! Please feel free to submit a Pull Request.

License #

This project is licensed under the MIT License - see the LICENSE file for details.

Author #

PharmaGO Team

For questions or support, please open an issue on GitHub.