132 lines
4.6 KiB
Dart
132 lines
4.6 KiB
Dart
import 'dart:math';
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import 'package:flutter/material.dart';
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import 'package:charts_flutter/flutter.dart' as charts;
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import 'package:charts_flutter/src/base_chart_state.dart' as state;
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import 'package:charts_common/common.dart' as common;
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import 'package:lbry/lbry.dart';
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class SimpleTimeSeriesChart extends StatefulWidget {
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SimpleTimeSeriesChart({Key key}) : super(key: key);
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@override
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_SimpleTimeSeriesChartState createState() => _SimpleTimeSeriesChartState();
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}
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class _SimpleTimeSeriesChartState extends State<SimpleTimeSeriesChart> {
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final List<LoadDataPoint> loadData = [];
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final List<charts.Series<LoadDataPoint, DateTime>> loadSeries = [];
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final List<charts.Series<LoadDataPoint, DateTime>> timeSeries = [];
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final Random rand = Random();
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LoadGenerator loadGenerator;
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@override
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void initState() {
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super.initState();
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loadSeries.add(
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charts.Series<LoadDataPoint, DateTime>(
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id: 'Load',
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colorFn: (_, __) => charts.MaterialPalette.black.darker,
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domainFn: (LoadDataPoint load, _) => load.time,
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measureFn: (LoadDataPoint load, _) => load.load,
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data: loadData,
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)
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);
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loadSeries.add(
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charts.Series<LoadDataPoint, DateTime>(
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id: 'Success',
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colorFn: (_, __) => charts.MaterialPalette.green.shadeDefault,
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domainFn: (LoadDataPoint load, _) => load.time,
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measureFn: (LoadDataPoint load, _) => load.success,
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data: loadData,
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)
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);
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loadSeries.add(
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charts.Series<LoadDataPoint, DateTime>(
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id: 'Backlog',
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colorFn: (_, __) => charts.MaterialPalette.red.shadeDefault,
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domainFn: (LoadDataPoint load, _) => load.time,
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measureFn: (LoadDataPoint load, _) => load.backlog,
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data: loadData,
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)
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);
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loadSeries.add(
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charts.Series<LoadDataPoint, DateTime>(
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id: 'Catch-up',
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colorFn: (_, __) => charts.MaterialPalette.yellow.shadeDefault,
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domainFn: (LoadDataPoint load, _) => load.time,
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measureFn: (LoadDataPoint load, _) => load.catchup,
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data: loadData,
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)
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);
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timeSeries.add(
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charts.Series<LoadDataPoint, DateTime>(
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id: 'Avg. Success Time',
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colorFn: (_, __) => charts.MaterialPalette.green.shadeDefault,
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domainFn: (LoadDataPoint load, _) => load.time,
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measureFn: (LoadDataPoint load, _) => load.avg_success,
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data: loadData,
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)
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);
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timeSeries.add(
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charts.Series<LoadDataPoint, DateTime>(
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id: 'Avg. Catch-up Time',
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colorFn: (_, __) => charts.MaterialPalette.yellow.shadeDefault,
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domainFn: (LoadDataPoint load, _) => load.time,
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measureFn: (LoadDataPoint load, _) => load.avg_catchup,
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data: loadData,
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)
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);
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var increase = 2;
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loadData.add(LoadDataPoint());
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loadGenerator = LoadGenerator((t, stats) {
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setState(() {
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//if (loadData.length > 60) loadData.removeAt(0);
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loadData.add(stats);
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});
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increase = max(1, min(30, (increase*1.1).ceil())-stats.backlog);
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t.load = increase;//rand.nextInt(10)+5;
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return true;
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})..start();
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}
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@override
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void dispose() {
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loadGenerator.stop();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return Column(children: <Widget>[
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SizedBox(height: 250.0, child: BetterTimeSeriesChart(loadSeries)),
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SizedBox(height: 250.0, child: BetterTimeSeriesChart(timeSeries)),
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]);
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}
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}
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class BetterTimeSeriesChart extends charts.TimeSeriesChart {
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final int itemCount;
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final Object lastItem;
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BetterTimeSeriesChart(
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List<charts.Series<dynamic, DateTime>> seriesList):
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itemCount = seriesList[0].data.length,
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lastItem = seriesList[0].data.last,
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super(seriesList, behaviors: [charts.SeriesLegend()]);
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@override
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void updateCommonChart(common.BaseChart baseChart, charts.BaseChart oldWidget,
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state.BaseChartState chartState) {
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super.updateCommonChart(baseChart, oldWidget, chartState);
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final prev = oldWidget as BetterTimeSeriesChart;
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if (itemCount != prev?.itemCount || lastItem != prev?.lastItem) {
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chartState.markChartDirty();
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}
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}
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}
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