flutter_circular_chart/example/animated_pie_chart_example.dart
Sphericalkat d601842da0
fix(treewide): migrate to sound null safety
Signed-off-by: Sphericalkat <me@kat.bio>
2024-07-02 11:43:07 +05:30

85 lines
2.6 KiB
Dart

import 'package:flutter/material.dart';
import 'package:flutter_circular_chart_two/flutter_circular_chart_two.dart';
void main() {
runApp(MaterialApp(
home: AnimatedPieChartExample(),
));
}
final List<List<CircularStackEntry>> _quarterlyProfitPieData = [
<CircularStackEntry>[
CircularStackEntry(
<CircularSegmentEntry>[
CircularSegmentEntry(500.0, Colors.red[200], rankKey: 'Q1'),
CircularSegmentEntry(1000.0, Colors.green[200], rankKey: 'Q2'),
CircularSegmentEntry(2000.0, Colors.blue[200], rankKey: 'Q3'),
CircularSegmentEntry(1000.0, Colors.yellow[200], rankKey: 'Q4'),
],
rankKey: 'Quarterly Profits',
),
],
<CircularStackEntry>[
CircularStackEntry(
<CircularSegmentEntry>[
CircularSegmentEntry(1500.0, Colors.red[200], rankKey: 'Q1'),
CircularSegmentEntry(750.0, Colors.green[200], rankKey: 'Q2'),
CircularSegmentEntry(2000.0, Colors.blue[200], rankKey: 'Q3'),
CircularSegmentEntry(1000.0, Colors.yellow[200], rankKey: 'Q4'),
],
rankKey: 'Quarterly Profits',
),
],
<CircularStackEntry>[
CircularStackEntry(
<CircularSegmentEntry>[
CircularSegmentEntry(1800.0, Colors.red[200], rankKey: 'Q1'),
CircularSegmentEntry(2900.0, Colors.green[200], rankKey: 'Q2'),
CircularSegmentEntry(4000.0, Colors.blue[200], rankKey: 'Q3'),
CircularSegmentEntry(7000.0, Colors.yellow[200], rankKey: 'Q4'),
],
rankKey: 'Quarterly Profits',
),
],
];
class AnimatedPieChartExample extends StatefulWidget {
@override
_AnimatedPieChartExampleState createState() => _AnimatedPieChartExampleState();
}
class _AnimatedPieChartExampleState extends State<AnimatedPieChartExample> {
final GlobalKey<AnimatedCircularChartState> _chartKey = GlobalKey<AnimatedCircularChartState>();
final _chartSize = const Size(300.0, 300.0);
int sampleIndex = 0;
void _cycleSamples() {
setState(() {
sampleIndex++;
List<CircularStackEntry> data = _quarterlyProfitPieData[sampleIndex % 3];
_chartKey.currentState!.updateData(data);
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Quarterly Profit'),
),
body: Center(
child: AnimatedCircularChart(
key: _chartKey,
size: _chartSize,
initialChartData: _quarterlyProfitPieData[0],
chartType: CircularChartType.Pie,
),
),
floatingActionButton: FloatingActionButton(
child: Icon(Icons.refresh),
onPressed: _cycleSamples,
),
);
}
}