pie_chart 0.4.0

Flutter Pie Chart with animations.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:pie_chart/pie_chart.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blueGrey,
      ),
      home: HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  bool toggle = false;
  Map<String, double> dataMap = new Map();

  @override
  void initState() {
    super.initState();
    dataMap.putIfAbsent("Flutter", () => 5);
    dataMap.putIfAbsent("React", () => 3);
    dataMap.putIfAbsent("Xamarin", () => 2);
    dataMap.putIfAbsent("Ionic", () => 2);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Pie Chart"),
      ),
      body: Container(
        child: Center(
          child: toggle
              ? PieChart(
                  dataMap: dataMap,
                  legendFontColor: Colors.blueGrey[900],
                  legendFontSize: 14.0,
                  legendFontWeight: FontWeight.w500,
                  animationDuration: Duration(milliseconds: 800),
                  chartLegendSpacing: 32.0,
                  chartRadius: MediaQuery.of(context).size.width / 2.7,
                  showChartValuesInPercentage: true,
                  showChartValues: true,
                  chartValuesColor: Colors.blueGrey[900].withOpacity(0.9),
                )
              : Text("Press FAB to show chart"),
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: togglePieChart,
        child: Icon(Icons.insert_chart),
      ),
    );
  }

  void togglePieChart() {
    setState(() {
      toggle = !toggle;
    });
  }
}