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qr_code_scanner
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QRViewController updated 

- MethodChannel is now handled inside the controller
- Removed controller init, pass globalKey as required parameter
- Controller now returns a stream of data
- Updated README.md + example
flutter-beta
Luis Thein 7 年之前
父節點
8f1c4256dc
當前提交
224d1ebb71
共有 3 個檔案被更改，包括 132 行新增 和 103 行删除
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Show Stats Download Patch File Download Diff File
  1. +40
    -20
      README.md
  2. +79
    -72
      example/lib/main.dart
  3. +13
    -11
      lib/qr_code_scanner.dart

+ 40
- 20
README.md 查看文件

@@ -60,31 +60,39 @@ class _QRViewExampleState extends State<QRViewExample> {
Widget build(BuildContext context) { Widget build(BuildContext context) {
return Scaffold( return Scaffold(
body: Column( body: Column(
children: <Widget>[
QRView(
key: qrKey,
onQRViewCreated: _onQRViewCreated,
),
],
),
);
children: <Widget>[
Expanded(
flex: 5,
child: QRView(
key: qrKey,
onQRViewCreated: _onQRViewCreated,
),
),
Expanded(
flex: 1,
child: Center(
child: Text('Scan result: $qrText'),
),
)
],
),
);
} }


void _onQRViewCreated(QRViewController controller) { void _onQRViewCreated(QRViewController controller) {
final channel = controller.channel;
controller.init(qrKey);
this.controller = controller; this.controller = controller;
channel.setMethodCallHandler((MethodCall call) async {
switch (call.method) {
case "onRecognizeQR":
dynamic arguments = call.arguments;
setState(() {
qrText = arguments.toString();
});
}
controller.scannedDataStream.listen((scanData) {
setState(() {
qrText = scanData;
});
}); });
} }

@override
void dispose() {
controller?.dispose();
super.dispose();
}
} }
``` ```


@@ -104,9 +112,21 @@ controller.flipCamera();
## Flash (Off/On) ## Flash (Off/On)
By default, flash is OFF. By default, flash is OFF.
```dart ```dart
controller.flipFlash();
controller.toggleFlash();
```

## Resume/Pause
Pause camera stream and scanner.
```dart
controller.pause();
```
Resume camera stream and scanner.
```dart
controller.resume();
``` ```




# TODO'S: # TODO'S:
* iOS Native embedding is written to match what is supported in the framework as of the date of publication of this package. It needs to be improved as the framework support improves. * iOS Native embedding is written to match what is supported in the framework as of the date of publication of this package. It needs to be improved as the framework support improves.
* In future, options will be provided for default states. * In future, options will be provided for default states.


+ 79
- 72
example/lib/main.dart 查看文件

@@ -37,79 +37,86 @@ class _QRViewExampleState extends State<QRViewExample> {
flex: 4, flex: 4,
), ),
Expanded( Expanded(
child: Column(
children: <Widget>[
Text("This is the result of scan: $qrText"),
Row(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Container(
margin: EdgeInsets.all(8.0),
child: RaisedButton(
onPressed: () {
if (controller != null) {
controller.toggleFlash();
if (_isFlashOn(flashState))
setState(() {
flashState = flash_off;
});
else
setState(() {
flashState = flash_on;
});
}
},
child: Text(flashState, style: TextStyle(fontSize: 20)),
child: FittedBox(
fit: BoxFit.contain,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
Text("This is the result of scan: $qrText"),
Row(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Container(
margin: EdgeInsets.all(8.0),
child: RaisedButton(
onPressed: () {
if (controller != null) {
controller.toggleFlash();
if (_isFlashOn(flashState)) {
setState(() {
flashState = flash_off;
});
} else {
setState(() {
flashState = flash_on;
});
}
}
},
child:
Text(flashState, style: TextStyle(fontSize: 20)),
),
), ),
),
Container(
margin: EdgeInsets.all(8.0),
child: RaisedButton(
onPressed: () {
if (controller != null) {
controller.flipCamera();
if (_isBackCamera(cameraState))
setState(() {
cameraState = front_camera;
});
else
setState(() {
cameraState = back_camera;
});
}
},
child:
Text(cameraState, style: TextStyle(fontSize: 20)),
Container(
margin: EdgeInsets.all(8.0),
child: RaisedButton(
onPressed: () {
if (controller != null) {
controller.flipCamera();
if (_isBackCamera(cameraState)) {
setState(() {
cameraState = front_camera;
});
} else {
setState(() {
cameraState = back_camera;
});
}
}
},
child:
Text(cameraState, style: TextStyle(fontSize: 20)),
),
)
],
),
Row(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Container(
margin: EdgeInsets.all(8.0),
child: RaisedButton(
onPressed: () {
controller?.pauseCamera();
},
child: Text('pause', style: TextStyle(fontSize: 20)),
),
), ),
)
],
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Container(
margin: EdgeInsets.only(bottom: 8.0),
child: RaisedButton(
onPressed: () {
controller?.pauseCamera();
},
child: Text('pause', style: TextStyle(fontSize: 20)),
),
),
Container(
margin: EdgeInsets.only(bottom: 8.0),
child: RaisedButton(
onPressed: () {
controller.resumeCamera();
},
child: Text('resume', style: TextStyle(fontSize: 20)),
),
)
],
),
],
Container(
margin: EdgeInsets.all(8.0),
child: RaisedButton(
onPressed: () {
controller?.resumeCamera();
},
child: Text('resume', style: TextStyle(fontSize: 20)),
),
)
],
),
],
),
), ),
flex: 1, flex: 1,
) )
@@ -128,7 +135,7 @@ class _QRViewExampleState extends State<QRViewExample> {


void _onQRViewCreated(QRViewController controller) { void _onQRViewCreated(QRViewController controller) {
this.controller = controller; this.controller = controller;
controller.scannedData.listen((scanData) {
controller.scannedDataStream.listen((scanData) {
setState(() { setState(() {
qrText = scanData; qrText = scanData;
}); });


+ 13
- 11
lib/qr_code_scanner.dart 查看文件

@@ -10,7 +10,9 @@ class QRView extends StatefulWidget {
const QRView({ const QRView({
@required Key key, @required Key key,
@required this.onQRViewCreated, @required this.onQRViewCreated,
}) : super(key: key);
}) : assert(key != null),
assert(onQRViewCreated != null),
super(key: key);


final QRViewCreatedCallback onQRViewCreated; final QRViewCreatedCallback onQRViewCreated;


@@ -75,18 +77,20 @@ class _CreationParams {
class QRViewController { class QRViewController {
static const scanMethodCall = "onRecognizeQR"; static const scanMethodCall = "onRecognizeQR";


final MethodChannel _channel;

StreamController<String> _scanUpdateController = StreamController<String>(); StreamController<String> _scanUpdateController = StreamController<String>();


Stream<String> get scannedData => _scanUpdateController.stream;
Stream<String> get scannedDataStream => _scanUpdateController.stream;


QRViewController._(int id, GlobalKey qrKey) QRViewController._(int id, GlobalKey qrKey)
: channel = MethodChannel('net.touchcapture.qr.flutterqr/qrview_$id') {
: _channel = MethodChannel('net.touchcapture.qr.flutterqr/qrview_$id') {
if (defaultTargetPlatform == TargetPlatform.iOS) { if (defaultTargetPlatform == TargetPlatform.iOS) {
final RenderBox renderBox = qrKey.currentContext.findRenderObject(); final RenderBox renderBox = qrKey.currentContext.findRenderObject();
channel.invokeMethod("setDimensions",
_channel.invokeMethod("setDimensions",
{"width": renderBox.size.width, "height": renderBox.size.height}); {"width": renderBox.size.width, "height": renderBox.size.height});
} }
channel.setMethodCallHandler(
_channel.setMethodCallHandler(
(MethodCall call) async { (MethodCall call) async {
switch (call.method) { switch (call.method) {
case scanMethodCall: case scanMethodCall:
@@ -98,22 +102,20 @@ class QRViewController {
); );
} }


final MethodChannel channel;

void flipCamera() { void flipCamera() {
channel.invokeMethod("flipCamera");
_channel.invokeMethod("flipCamera");
} }


void toggleFlash() { void toggleFlash() {
channel.invokeMethod("toggleFlash");
_channel.invokeMethod("toggleFlash");
} }


void pauseCamera() { void pauseCamera() {
channel.invokeMethod("pauseCamera");
_channel.invokeMethod("pauseCamera");
} }


void resumeCamera() { void resumeCamera() {
channel.invokeMethod("resumeCamera");
_channel.invokeMethod("resumeCamera");
} }


void dispose() { void dispose() {


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