From 1ca84e60b87dfde1c709b517fc2ed26f8387df1d Mon Sep 17 00:00:00 2001
From: Abhishek Ghaskata <abhishekghaskata1999@gmail.com>
Date: Fri, 21 May 2021 23:04:08 +0530
Subject: [PATCH] Refactor layers example (#83070)

---
 examples/layers/services/isolate.dart        | 23 +++++++-------------
 examples/layers/widgets/spinning_square.dart | 20 ++++++-----------
 2 files changed, 15 insertions(+), 28 deletions(-)

diff --git a/examples/layers/services/isolate.dart b/examples/layers/services/isolate.dart
index 255d098067..fbd32bddfd 100644
--- a/examples/layers/services/isolate.dart
+++ b/examples/layers/services/isolate.dart
@@ -210,21 +210,14 @@ class IsolateExampleState extends State<StatefulWidget> with SingleTickerProvide
   String _label = 'Start';
   String _result = ' ';
   double _progress = 0.0;
-  late AnimationController _animation;
-  late CalculationManager _calculationManager;
-
-  @override
-  void initState() {
-    super.initState();
-    _animation = AnimationController(
-      duration: const Duration(milliseconds: 3600),
-      vsync: this,
-    )..repeat();
-    _calculationManager = CalculationManager(
-      onProgressListener: _handleProgressUpdate,
-      onResultListener: _handleResult,
-    );
-  }
+  late final AnimationController _animation = AnimationController(
+    duration: const Duration(milliseconds: 3600),
+    vsync: this,
+  )..repeat();
+  late final CalculationManager _calculationManager = CalculationManager(
+    onProgressListener: _handleProgressUpdate,
+    onResultListener: _handleResult,
+  );
 
   @override
   void dispose() {
diff --git a/examples/layers/widgets/spinning_square.dart b/examples/layers/widgets/spinning_square.dart
index 4a3dfb1b9d..0033179768 100644
--- a/examples/layers/widgets/spinning_square.dart
+++ b/examples/layers/widgets/spinning_square.dart
@@ -12,19 +12,13 @@ class SpinningSquare extends StatefulWidget {
 }
 
 class _SpinningSquareState extends State<SpinningSquare> with SingleTickerProviderStateMixin {
-  late AnimationController _animation;
-
-  @override
-  void initState() {
-    super.initState();
-    // We use 3600 milliseconds instead of 1800 milliseconds because 0.0 -> 1.0
-    // represents an entire turn of the square whereas in the other examples
-    // we used 0.0 -> math.pi, which is only half a turn.
-    _animation = AnimationController(
-      duration: const Duration(milliseconds: 3600),
-      vsync: this,
-    )..repeat();
-  }
+  // We use 3600 milliseconds instead of 1800 milliseconds because 0.0 -> 1.0
+  // represents an entire turn of the square whereas in the other examples
+  // we used 0.0 -> math.pi, which is only half a turn.
+  late final AnimationController _animation = AnimationController(
+    duration: const Duration(milliseconds: 3600),
+    vsync: this,
+  )..repeat();
 
   @override
   void dispose() {