125 lines
3.3 KiB
Dart
125 lines
3.3 KiB
Dart
import 'package:flutter/material.dart';
|
|
import 'package:flutter_circular_chart_two/flutter_circular_chart_two.dart';
|
|
|
|
void main() {
|
|
runApp(MaterialApp(
|
|
home: AnimatedRadialChartExample(),
|
|
));
|
|
}
|
|
|
|
class AnimatedRadialChartExample extends StatefulWidget {
|
|
@override
|
|
_AnimatedRadialChartExampleState createState() => _AnimatedRadialChartExampleState();
|
|
}
|
|
|
|
class _AnimatedRadialChartExampleState extends State<AnimatedRadialChartExample> {
|
|
final GlobalKey<AnimatedCircularChartState> _chartKey = GlobalKey<AnimatedCircularChartState>();
|
|
final _chartSize = const Size(200.0, 200.0);
|
|
|
|
double value = 50.0;
|
|
Color? labelColor = Colors.blue[200];
|
|
|
|
void _increment() {
|
|
setState(() {
|
|
value += 10;
|
|
List<CircularStackEntry> data = _generateChartData(value);
|
|
_chartKey.currentState!.updateData(data);
|
|
});
|
|
}
|
|
|
|
void _decrement() {
|
|
setState(() {
|
|
value -= 10;
|
|
List<CircularStackEntry> data = _generateChartData(value);
|
|
_chartKey.currentState!.updateData(data);
|
|
});
|
|
}
|
|
|
|
List<CircularStackEntry> _generateChartData(double value) {
|
|
Color? dialColor = Colors.blue[200];
|
|
if (value < 0) {
|
|
dialColor = Colors.red[200];
|
|
} else if (value < 50) {
|
|
dialColor = Colors.yellow[200];
|
|
}
|
|
labelColor = dialColor;
|
|
|
|
List<CircularStackEntry> data = <CircularStackEntry>[
|
|
CircularStackEntry(
|
|
<CircularSegmentEntry>[
|
|
CircularSegmentEntry(
|
|
value,
|
|
dialColor,
|
|
rankKey: 'percentage',
|
|
)
|
|
],
|
|
rankKey: 'percentage',
|
|
),
|
|
];
|
|
|
|
if (value > 100) {
|
|
labelColor = Colors.green[200];
|
|
|
|
data.add(CircularStackEntry(
|
|
<CircularSegmentEntry>[
|
|
CircularSegmentEntry(
|
|
value - 100,
|
|
Colors.green[200],
|
|
rankKey: 'percentage',
|
|
),
|
|
],
|
|
rankKey: 'percentage2',
|
|
));
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
TextStyle _labelStyle =
|
|
Theme.of(context).textTheme.headline6!.merge(TextStyle(color: labelColor));
|
|
|
|
return Scaffold(
|
|
appBar: AppBar(
|
|
title: const Text('Percentage Dial'),
|
|
),
|
|
body: Column(
|
|
children: <Widget>[
|
|
Container(
|
|
child: AnimatedCircularChart(
|
|
key: _chartKey,
|
|
size: _chartSize,
|
|
initialChartData: _generateChartData(value),
|
|
chartType: CircularChartType.Radial,
|
|
edgeStyle: SegmentEdgeStyle.round,
|
|
percentageValues: true,
|
|
holeLabel: '$value%',
|
|
labelStyle: _labelStyle,
|
|
),
|
|
),
|
|
Row(
|
|
mainAxisAlignment: MainAxisAlignment.spaceAround,
|
|
children: <Widget>[
|
|
RaisedButton(
|
|
onPressed: _decrement,
|
|
child: const Icon(Icons.remove),
|
|
shape: const CircleBorder(),
|
|
color: Colors.red[200],
|
|
textColor: Colors.white,
|
|
),
|
|
RaisedButton(
|
|
onPressed: _increment,
|
|
child: const Icon(Icons.add),
|
|
shape: const CircleBorder(),
|
|
color: Colors.blue[200],
|
|
textColor: Colors.white,
|
|
),
|
|
],
|
|
),
|
|
],
|
|
),
|
|
);
|
|
}
|
|
}
|