rotation_detector 1.0.2

A widget that gives rotation behavior to a circular child widget

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter_circular_chart/flutter_circular_chart.dart';
import 'package:rotation_detector/rotation_detector.dart';

void main() => runApp(new MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      theme: new ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or press Run > Flutter Hot Reload in IntelliJ). Notice that the
        // counter didn't reset back to zero; the application is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: new MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  _MyHomePageState createState() => new _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  final GlobalKey<AnimatedCircularChartState> _chartKey =
      new GlobalKey<AnimatedCircularChartState>();
  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',
    ),
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Material(
          shape: CircleBorder(),
          elevation: 2.0,
          child: RotationDetector(
            width: 300.0,
            height: 300.0,
            child: AnimatedCircularChart(
              key: _chartKey,
              size: const Size(300.0, 300.0),
              holeRadius: 300.0,
              initialChartData: data,
              chartType: CircularChartType.Pie,
            ),
          ),
        ),
      ),
    );
  }
}