Null safety for Shimmer effect (#10071)

flutter · Jan 31, 2024 · db6fa0b · db6fa0b
1 parent 8cd1706
commit db6fa0b
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Showing 2 changed files with 4 additions and 2 deletions.
diff --git a/examples/cookbook/effects/shimmer_loading/lib/original_example.dart b/examples/cookbook/effects/shimmer_loading/lib/original_example.dart
@@ -156,7 +156,8 @@ class ShimmerState extends State<Shimmer> with SingleTickerProviderStateMixin {
       );
   // #enddocregion LinearGradient
 
-  bool get isSized => (context.findRenderObject() as RenderBox).hasSize;
+  bool get isSized =>
+      (context.findRenderObject() as RenderBox?)?.hasSize ?? false;
 
   Size get size => (context.findRenderObject() as RenderBox).size;
 

diff --git a/src/cookbook/effects/shimmer-loading.md b/src/cookbook/effects/shimmer-loading.md
@@ -732,7 +732,8 @@ class ShimmerState extends State<Shimmer> with SingleTickerProviderStateMixin {
             _SlidingGradientTransform(slidePercent: _shimmerController.value),
       );
 
-  bool get isSized => (context.findRenderObject() as RenderBox).hasSize;
+  bool get isSized =>
+      (context.findRenderObject() as RenderBox?)?.hasSize ?? false;
 
   Size get size => (context.findRenderObject() as RenderBox).size;