Merge pull request imaNNeo#524 from imaNNeoFighT/hotfix/pie-chart-fir…

…st-frame

Fixed PieChart badges draw in first frame problem, imaNNeo#513.

CHANGELOG.md

@@ -1,3 +1,6 @@
+## newVersion
+* [Bugfix] Fixed PieChart badges draw in first frame problem, #513.
+
 ## 0.12.1
 * [Bugfix] Fixed PieChart badges bug with re-implementing the solution, #507
 * [Bugfix] Fix the setState issue using PieChart in the ListView, #467

lib/src/chart/pie_chart/pie_chart.dart

@@ -44,6 +44,17 @@ class _PieChartState extends AnimatedWidgetBaseState<PieChart> {
   /// this is used to retrieve the chart size to handle the touches
   final GlobalKey _chartKey = GlobalKey();
 
+  @override
+  void initState() {
+    /// Make sure that [_widgetsPositionHandler] is updated.
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (mounted) {
+        setState(() {});
+      }
+    });
+    super.initState();
+  }
+
   @override
   Widget build(BuildContext context) {
     final PieChartData showingData = _getData();