flutter_package / mobile_scanner

Go to a project
Toggle navigation Toggle navigation pinning
Navaron Bracke
c159cd70 1 parent 5c742696

remove duplicate value notifier; update try catch in start camera; format FAB button

Inline Side-by-side
Showing 1 changed file with 37 additions and 31 deletions
... ... @@ -12,8 +12,6 @@ class _BarcodeScannerWithOverlayState extends State<BarcodeScannerWithOverlay> {
String overlayText = "Please scan QR Code";
bool camStarted = false;
final ValueNotifier<bool> torchStateNotifier = ValueNotifier<bool>(false);
final MobileScannerController controller = MobileScannerController(
formats: const [BarcodeFormat.qrCode],
autoStart: false,
... ... @@ -26,19 +24,26 @@ class _BarcodeScannerWithOverlayState extends State<BarcodeScannerWithOverlay> {
}
void startCamera() {
try {
setState(() {
camStarted = !camStarted;
controller.start();
});
} on Exception catch (e) {
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(
content: Text('Something went wrong! $e'),
backgroundColor: Colors.red,
),
);
if (camStarted) {
return;
}
controller.start().then((_) {
if (mounted) {
setState(() {
camStarted = true;
});
}
}).catchError((Object error, StackTrace stackTrace) {
if (mounted) {
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(
content: Text('Something went wrong! $error'),
backgroundColor: Colors.red,
),
);
}
});
}
void onBarcodeDetect(BarcodeCapture barcodeCapture) {
... ... @@ -112,20 +117,25 @@ class _BarcodeScannerWithOverlayState extends State<BarcodeScannerWithOverlay> {
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
ValueListenableBuilder<bool>(
valueListenable: torchStateNotifier,
builder: (context, isTorchOn, child) {
ValueListenableBuilder<TorchState>(
valueListenable: controller.torchState,
builder: (context, value, child) {
final Color iconColor;
switch (value) {
case TorchState.off:
iconColor = Colors.black;
break;
case TorchState.on:
iconColor = Colors.yellow;
break;
}
return IconButton(
onPressed: () {
controller.toggleTorch();
torchStateNotifier.value =
!torchStateNotifier.value;
},
onPressed: () => controller.toggleTorch(),
icon: Icon(
Icons.flashlight_on,
color: isTorchOn
? Colors.yellow
: Colors.black,
color: iconColor,
),
);
},
... ... @@ -153,12 +163,8 @@ class _BarcodeScannerWithOverlayState extends State<BarcodeScannerWithOverlay> {
floatingActionButton: camStarted
? null
: FloatingActionButton(
child: const Icon(
Icons.camera_alt,
),
onPressed: () {
startCamera();
},
onPressed: startCamera,
child: const Icon(Icons.camera_alt),
),
);
}
... ...