flutter_camera_ml_vision 3.0.1 flutter_camera_ml_vision: ^3.0.1 copied to clipboard
A flutter widget that show the camera stream and allow ML vision recognition on it, it allow you to detect barcodes, labels, text, faces...
import 'dart:ui';
import 'package:firebase_ml_vision/firebase_ml_vision.dart';
import 'package:flutter/material.dart';
import 'package:flutter_camera_ml_vision/flutter_camera_ml_vision.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
List<String> data = [];
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Column(
mainAxisSize: MainAxisSize.min,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
ElevatedButton(
onPressed: () async {
final barcode = await Navigator.of(context).push<Barcode>(
MaterialPageRoute(
builder: (c) {
return ScanPage();
},
),
);
if (barcode == null) {
return;
}
setState(() {
data.add(barcode.displayValue);
});
},
child: Text('Scan product'),
),
Expanded(
child: ListView(
children: data.map((d) => Text(d)).toList(),
),
),
],
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}
class ScanPage extends StatefulWidget {
@override
_ScanPageState createState() => _ScanPageState();
}
class _ScanPageState extends State<ScanPage> {
bool resultSent = false;
BarcodeDetector detector = FirebaseVision.instance.barcodeDetector();
@override
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: SizedBox(
width: MediaQuery.of(context).size.width,
child: CameraMlVision<List<Barcode>>(
overlayBuilder: (c) {
return Container(
decoration: ShapeDecoration(
shape: _ScannerOverlayShape(
borderColor: Theme.of(context).primaryColor,
borderWidth: 3.0,
),
),
);
},
detector: detector.detectInImage,
onResult: (List<Barcode> barcodes) {
if (!mounted ||
resultSent ||
barcodes == null ||
barcodes.isEmpty) {
return;
}
resultSent = true;
Navigator.of(context).pop<Barcode>(barcodes.first);
},
onDispose: () {
detector.close();
},
),
),
),
);
}
}
class _ScannerOverlayShape extends ShapeBorder {
final Color borderColor;
final double borderWidth;
final Color overlayColor;
_ScannerOverlayShape({
this.borderColor = Colors.white,
this.borderWidth = 1.0,
this.overlayColor = const Color(0x88000000),
});
@override
EdgeInsetsGeometry get dimensions => EdgeInsets.all(10.0);
@override
Path getInnerPath(Rect rect, {TextDirection textDirection}) {
return Path()
..fillType = PathFillType.evenOdd
..addPath(getOuterPath(rect), Offset.zero);
}
@override
Path getOuterPath(Rect rect, {TextDirection textDirection}) {
Path _getLeftTopPath(Rect rect) {
return Path()
..moveTo(rect.left, rect.bottom)
..lineTo(rect.left, rect.top)
..lineTo(rect.right, rect.top);
}
return _getLeftTopPath(rect)
..lineTo(
rect.right,
rect.bottom,
)
..lineTo(
rect.left,
rect.bottom,
)
..lineTo(
rect.left,
rect.top,
);
}
@override
void paint(Canvas canvas, Rect rect, {TextDirection textDirection}) {
const lineSize = 30;
final width = rect.width;
final borderWidthSize = width * 10 / 100;
final height = rect.height;
final borderHeightSize = height - (width - borderWidthSize);
final borderSize = Size(borderWidthSize / 2, borderHeightSize / 2);
var paint = Paint()
..color = overlayColor
..style = PaintingStyle.fill;
canvas
..drawRect(
Rect.fromLTRB(
rect.left, rect.top, rect.right, borderSize.height + rect.top),
paint,
)
..drawRect(
Rect.fromLTRB(rect.left, rect.bottom - borderSize.height, rect.right,
rect.bottom),
paint,
)
..drawRect(
Rect.fromLTRB(rect.left, rect.top + borderSize.height,
rect.left + borderSize.width, rect.bottom - borderSize.height),
paint,
)
..drawRect(
Rect.fromLTRB(
rect.right - borderSize.width,
rect.top + borderSize.height,
rect.right,
rect.bottom - borderSize.height),
paint,
);
paint = Paint()
..color = borderColor
..style = PaintingStyle.stroke
..strokeWidth = borderWidth;
final borderOffset = borderWidth / 2;
final realReact = Rect.fromLTRB(
borderSize.width + borderOffset,
borderSize.height + borderOffset + rect.top,
width - borderSize.width - borderOffset,
height - borderSize.height - borderOffset + rect.top);
//Draw top right corner
canvas
..drawPath(
Path()
..moveTo(realReact.right, realReact.top)
..lineTo(realReact.right, realReact.top + lineSize),
paint)
..drawPath(
Path()
..moveTo(realReact.right, realReact.top)
..lineTo(realReact.right - lineSize, realReact.top),
paint)
..drawPoints(
PointMode.points,
[Offset(realReact.right, realReact.top)],
paint,
)
//Draw top left corner
..drawPath(
Path()
..moveTo(realReact.left, realReact.top)
..lineTo(realReact.left, realReact.top + lineSize),
paint)
..drawPath(
Path()
..moveTo(realReact.left, realReact.top)
..lineTo(realReact.left + lineSize, realReact.top),
paint)
..drawPoints(
PointMode.points,
[Offset(realReact.left, realReact.top)],
paint,
)
//Draw bottom right corner
..drawPath(
Path()
..moveTo(realReact.right, realReact.bottom)
..lineTo(realReact.right, realReact.bottom - lineSize),
paint)
..drawPath(
Path()
..moveTo(realReact.right, realReact.bottom)
..lineTo(realReact.right - lineSize, realReact.bottom),
paint)
..drawPoints(
PointMode.points,
[Offset(realReact.right, realReact.bottom)],
paint,
)
//Draw bottom left corner
..drawPath(
Path()
..moveTo(realReact.left, realReact.bottom)
..lineTo(realReact.left, realReact.bottom - lineSize),
paint)
..drawPath(
Path()
..moveTo(realReact.left, realReact.bottom)
..lineTo(realReact.left + lineSize, realReact.bottom),
paint)
..drawPoints(
PointMode.points,
[Offset(realReact.left, realReact.bottom)],
paint,
);
}
@override
ShapeBorder scale(double t) {
return _ScannerOverlayShape(
borderColor: borderColor,
borderWidth: borderWidth,
overlayColor: overlayColor,
);
}
}