Update README.md
- Fix missing GlobalKey initializer - Add dart syntax highlighting to code snippets
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README.md
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README.md
@ -34,19 +34,19 @@ __Note:__ This is a WIP early implementation, use at your own risk. You can inst
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Import the package:
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```
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```dart
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import 'package:flutter_circular_chart/flutter_circular_chart.dart';
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```
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Create a [GlobalKey](https://docs.flutter.io/flutter/widgets/GlobalKey-class.html) to be able to access the chart and update its data:
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```
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final GlobalKey<AnimatedCircularChartState> _chartKey;
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```dart
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final GlobalKey<AnimatedCircularChartState> _chartKey = new GlobalKey<AnimatedCircularChartState>();
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```
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Create chart data entry objects:
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```
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```dart
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List<CircularStackEntry> data = <CircularStackEntry>[
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new CircularStackEntry(
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<CircularSegmentEntry>[
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@ -62,7 +62,7 @@ List<CircularStackEntry> data = <CircularStackEntry>[
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Create an `AnimatedCircularChart`, passing it the `_chartKey` and initial `data`:
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```
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```dart
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@override
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Widget build(BuildContext context) {
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return new AnimatedCircularChart(
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@ -76,7 +76,7 @@ Widget build(BuildContext context) {
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Call `updateData` to animate the chart:
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```
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```dart
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void _cycleSamples() {
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List<CircularStackEntry> nextData = <CircularStackEntry>[
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new CircularStackEntry(
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