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/// Demo of using the oscilloscope package | |
/// This uses the output from the Acceleromter on a device | |
import 'package:flutter/material.dart'; | |
import 'package:oscilloscope/oscilloscope.dart'; | |
import 'package:sensors/sensors.dart'; | |
void main() => runApp(new MyApp()); | |
class MyApp extends StatelessWidget { | |
@override | |
Widget build(BuildContext context) { | |
return new MaterialApp( | |
title: "Oscilloscope Display Example", | |
home: Shell(), | |
); | |
} | |
} | |
class Shell extends StatefulWidget { | |
@override | |
_ShellState createState() => _ShellState(); | |
} | |
class _ShellState extends State<Shell> { | |
List<double> traceX = List(); | |
@override | |
initState() { | |
super.initState(); | |
accelerometerEvents.listen( (AccelerometerEvent event){ | |
setState(() { | |
traceX.add(event.x); | |
}); | |
}); | |
} | |
@override | |
void dispose() { | |
super.dispose(); | |
} | |
@override | |
Widget build(BuildContext context) { | |
// Create A Scope Display | |
Oscilloscope scopeOne = Oscilloscope( | |
padding: 20.0, | |
backgroundColor: Colors.black, | |
traceColor: Colors.green, | |
yAxisMax: 10.0, | |
yAxisMin: -10.0, | |
dataSet: traceX, | |
); | |
// Generate the Scaffold | |
return Scaffold( | |
appBar: AppBar( | |
title: Text("OscilloScope Demo"), | |
), | |
body: Column( | |
children: <Widget>[ | |
Expanded(flex: 1, child: scopeOne), | |
], | |
), | |
); | |
} | |
} | |
Thats is because the gist is now 3 years old and the code is correct for the version of Dart/Flutter it was written again. The Dart language has advanced a great deal since then, null safety etc.
Looks like the list.filled() now needs params specified - see https://api.dart.dev/stable/2.13.4/dart-core/List/List.filled.html
Alternatively you could probably just init like this
List traceX = [];
Thats is because the gist is now 3 years old and the code is correct for the version of Dart/Flutter it was written again. The Dart language has advanced a great deal since then, null safety etc.
Looks like the list.filled() now needs params specified - see https://api.dart.dev/stable/2.13.4/dart-core/List/List.filled.html
Alternatively you could probably just init like thisList traceX = [];
The problem was solved! Thank you.
hi i have test code but i think slowl not real time . How to speed up to real time.
lib/main.dart:27:36: Error: Too few positional arguments: 2 required, 0 given.
List traceX = List.filled();
^
org-dartlang-sdk:///third_party/dart/sdk/lib/_internal/vm/lib/array_patch.dart:19:11: Context: Found this candidate, but the arguments don't match.
factory List.filled(int length, E fill, {bool growable: false}) {
^^^^^^