ventilatorgraph 0.1.0

Recently people had been developing ventilator using Andruino and Flutter and one of the component needed is the Graphic showing input data from the sensor to the monitor. This widget use the same log [...]

example/main.dart

import 'package:ventilatorgraph/ventilatorgraph.dart';
import 'package:flutter/material.dart';
import 'dart:math';
import 'dart:async';

void main() => runApp(new MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: "Ventilator Graph Display Example",
      home: GraphVentilator(),
    );
  }
}

class GraphVentilator extends StatefulWidget {
  static String id = 'Graph Ventilator';

  @override
  _GraphVentilatorState createState() => _GraphVentilatorState();
}

class _GraphVentilatorState extends State<GraphVentilator> {
  int index = 0;
  double maxData = 1;
  double minData = -1;
  int dataWidth = 100;
  int lineSegment = 3;
  List dataSetPressure = List();
  List dataSetFlow = List();
  double radians = 0.0;
  Timer _timer;

  ///generate sample data using sines and cosines wave
  _generateData(Timer t) {
    var sv = sin((radians * pi));
    var cv = cos((radians * pi));

    ///move the pointer along the grapht and add data to the current pointer
    setState(() {
      index++;
      if (index == dataWidth) {
        index = 0;
      }
      dataSetPressure[index.toInt()] = sv;
      dataSetFlow[index.toInt()] = cv;
    });

    radians += 0.05;
    if (radians >= 2.0) {
      radians = 0.0;
    }
  }

  List generateDataSet(int maxData) {
    List dataSet = List();
    for (int i = 0; i < dataWidth; i++) {
      dataSet.add(maxData);
    }
    return dataSet;
  }

  @override
  void dispose() {
    // TODO: implement dispose
    super.dispose();
  }

  @override
  void initState() {
    // TODO: implement initState
    super.initState();

    /// populate our data set
    dataSetPressure = generateDataSet(maxData.toInt());
    dataSetFlow = generateDataSet(maxData.toInt());

    /// start moving the pointer
    _timer = Timer.periodic(Duration(milliseconds: 60), _generateData);
  }

  @override
  Widget build(BuildContext context) {
    //dataSet = generateDataSet(maxData.toInt());
    return Scaffold(
      body: SafeArea(
        child: Column(
          children: <Widget>[
            Expanded(
              child: GraphWithPointer(
                index: index,
                maxY: maxData,
                minY: minData,
                totalSegmentY: lineSegment,
                dataSet: dataSetPressure,
                backgroundColor: Color.fromRGBO(58, 66, 86, 1.0),
                lineColor: Colors.blueAccent,
                segmentYColor: Colors.white,
              ),
            ),
            Expanded(
              child: GraphWithPointer(
                index: index,
                maxY: maxData,
                minY: minData,
                totalSegmentY: lineSegment,
                dataSet: dataSetFlow,
                backgroundColor: Color.fromRGBO(58, 66, 86, 1.0),
                lineColor: Colors.yellowAccent,
                segmentYColor: Colors.white,
              ),
            ),
          ],
        ),
      ),
    );
  }
}