flutter pub add flutter_circular_chart基于插件公开信息、社区数据与项目使用情况整理的选型参考。
一个用于创建动画径向和饼图的 Flutter 包。它提供流畅、可定制的可视化效果，非常适合以紧凑且视觉吸引人的方式显示基于百分比的数据。图表支持动态更新，并设计为无缝集成到 Flutter 应用程序中。通过简单的配置选项，开发者可以轻松渲染用于仪表板、统计数据或进度指示器的引人入胜的圆形图表。
以下为关联源码仓库的 README 原文快照，最新内容请访问源码仓库。
A library for creating animated circular chart widgets with Flutter, inspired by Zero to One with Flutter.
Create easily animated pie charts and radial charts by providing them with data objects they can plot into charts and animate between.
Check the examples folder for the source code for the above screenshots.
Install the latest version from pub.
Import the package:
import 'package:flutter_circular_chart/flutter_circular_chart.dart';
Create a GlobalKey to be able to access the chart and update its data:
final GlobalKey<AnimatedCircularChartState> _chartKey = new GlobalKey<AnimatedCircularChartState>();
Create chart data entry objects:
List<CircularStackEntry> data = <CircularStackEntry>[
new CircularStackEntry(
<CircularSegmentEntry>[
new CircularSegmentEntry(500.0, Colors.red[200], rankKey: 'Q1'),
new CircularSegmentEntry(1000.0, Colors.green[200], rankKey: 'Q2'),
new CircularSegmentEntry(2000.0, Colors.blue[200], rankKey: 'Q3'),
new CircularSegmentEntry(1000.0, Colors.yellow[200], rankKey: 'Q4'),
],
rankKey: 'Quarterly Profits',
),
];
Create an AnimatedCircularChart, passing it the _chartKey and initial data:
@override
Widget build(BuildContext context) {
return new AnimatedCircularChart(
key: _chartKey,
size: const Size(300.0, 300.0),
initialChartData: data,
chartType: CircularChartType.Pie,
);
}
Call updateData to animate the chart:
void _cycleSamples() {
List<CircularStackEntry> nextData = <CircularStackEntry>[
new CircularStackEntry(
<CircularSegmentEntry>[
new CircularSegmentEntry(1500.0, Colors.red[200], rankKey: 'Q1'),
new CircularSegmentEntry(750.0, Colors.green[200], rankKey: 'Q2'),
new CircularSegmentEntry(2000.0, Colors.blue[200], rankKey: 'Q3'),
new CircularSegmentEntry(1000.0, Colors.yellow[200], rankKey: 'Q4'),
],
rankKey: 'Quarterly Profits',
),
];
setState(() {
_chartKey.currentState.updateData(nextData);
});
}
| Property | Default |
|---|---|
| holeLabel | null |
| labelStyle | Theme.of(context).textTheme.body2 |
Example:
new AnimatedCircularChart(
key: _chartKey,
size: _chartSize,
initialChartData: <CircularStackEntry>[
new CircularStackEntry(
<CircularSegmentEntry>[
new CircularSegmentEntry(
33.33,
Colors.blue[400],
rankKey: 'completed',
),
new CircularSegmentEntry(
66.67,
Colors.blueGrey[600],
rankKey: 'remaining',
),
],
rankKey: 'progress',
),
],
chartType: CircularChartType.Radial,
percentageValues: true,
holeLabel: '1/3',
labelStyle: new TextStyle(
color: Colors.blueGrey[600],
fontWeight: FontWeight.bold,
fontSize: 24.0,
),
)
| Property | Default |
|---|---|
| edgeStyle | SegmentEdgeStyle.flat |
| SegmentEdgeStyle | Description |
|---|---|
| flat (default) | Segments begin and end with a flat edge. |
| round | Segments begin and end with a semi-circle. |
Example:
new AnimatedCircularChart(
key: _chartKey,
size: _chartSize,
initialChartData: <CircularStackEntry>[
new CircularStackEntry(
<CircularSegmentEntry>[
new CircularSegmentEntry(
33.33,
Colors.blue[400],
rankKey: 'completed',
),
new CircularSegmentEntry(
66.67,
Colors.blueGrey[600],
rankKey: 'remaining',
),
],
rankKey: 'progress',
),
],
chartType: CircularChartType.Radial,
edgeStyle: SegmentEdgeStyle.round,
percentageValues: true,
)
Charts expect a list of CircularStackEntry objects containing the data they need to be drawn.
Each CircularStackEntry corresponds to a complete circle in the chart. For radial charts that is one of the rings, for pie charts it is the whole pie.
Radial charts with multiple CircularStackEntrys will display them as concentric circles.
Each CircularStackEntry is composed of multiple CircularSegmentEntrys containing the value of a data point. In radial charts a segment corresponds to an arc segment of the current ring, for pie charts it is an individual slice.