128 lines
3.6 KiB
Dart
128 lines
3.6 KiB
Dart
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import 'dart:async';
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import 'dart:core';
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import 'dart:math' as math;
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import 'package:fl_chart/fl_chart.dart';
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import 'package:flutter/material.dart';
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import 'package:logging/logging.dart';
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class Plot extends StatefulWidget {
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const Plot({
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super.key,
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required this.title,
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required this.aspectRatio,
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required this.maxTimeSeconds,
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required this.readAnalog,
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required this.sampleTimeMillis});
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final String title;
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final double aspectRatio;
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final int maxTimeSeconds;
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final Future<double> Function() readAnalog;
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final int sampleTimeMillis;
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@override
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State<StatefulWidget> createState() => _Plot();
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}
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class _Plot extends State<Plot> {
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late Timer timer;
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late int limit= ((widget.maxTimeSeconds)/(widget.sampleTimeMillis/1000)).toInt();
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late List<FlSpot> adc = <FlSpot>[];
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int index = 0;
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double el = 0.0;
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late Logger log;
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@override
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void dispose() {
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super.dispose();
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timer.cancel();
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}
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@override
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void initState() {
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super.initState();
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log = Logger("Plot : ${widget.title}");
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log.info('limit : $limit');
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timer = Timer.periodic(Duration(milliseconds: widget.sampleTimeMillis), (timer) {
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widget.readAnalog().then((val){
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if (index>=limit) {
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log.info('================================================================ reset $index : $el : ${index != 0 ? adc[index-1] : 0}');
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index = 0;
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el = 0.0;
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adc.clear();
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}
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setState(() {
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el = (index * widget.sampleTimeMillis)/1000;
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adc.add(FlSpot( el, val));
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log.info('================================================================ $index : $el : ${adc[index]}');
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index +=1;
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});
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});
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});
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}
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@override
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Widget build(BuildContext context) {
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return AspectRatio(
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aspectRatio: widget.aspectRatio,
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child : LineChart(
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LineChartData(
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minY: -5,
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maxY: 5,
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minX: 0,
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maxX: widget.maxTimeSeconds.toDouble(),
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lineBarsData: [LineChartBarData(
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spots: adc,
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dotData: const FlDotData(
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show: false,
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),
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barWidth: 2,
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isCurved: false,
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)],
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titlesData: const FlTitlesData(show: true,
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rightTitles: AxisTitles(sideTitles: SideTitles(reservedSize: 40, showTitles: false)),
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topTitles: AxisTitles(sideTitles: SideTitles(reservedSize: 40, showTitles: false)),
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),
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gridData: const FlGridData(show: true, drawVerticalLine: false),
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)
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)
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);
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}
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}
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class DummyData {
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late int limitCount;
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late List<FlSpot> sinPoints;
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double xValue = 0;
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double step = 0.05;
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int index = 0;
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late Timer timer;
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late void Function() stateChange;
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DummyData(){
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limitCount = (20/step).toInt();
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sinPoints = List<FlSpot>.generate(limitCount+1, (index) => FlSpot(index+step,0));
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}
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void begin(Function() sc) {
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stateChange = sc;
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timer = Timer.periodic(const Duration(milliseconds: 2), (timer) {
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stateChange.call();
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if (xValue >= 20) {
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xValue = 0;
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index = 0;
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sinPoints.clear();
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} else {
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xValue += step;
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index += 1;
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}
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// print("$index : $xValue");
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});
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}
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void update(){
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sinPoints.insert(index, FlSpot(xValue, 1 - (math.Random(xValue.toInt()).nextDouble()*2)));
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}
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}
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