From 49fa2e1e64f7b2cac956e168e33ff8312792fcfd Mon Sep 17 00:00:00 2001
From: Aditya Chavda <98031138+aditya-css@users.noreply.github.com>
Date: Mon, 29 Apr 2024 12:24:45 +0530
Subject: [PATCH] fix: :bug: Fixed RecalculateRootWidgetSize null check issue.
 (#429)

- Added `mounted` check in `addPostFrameCallback` under `recalculateRootWidgetSize` in `showcase.dart` as to ensure that the operation is only performed if the element is mounted.
---
 CHANGELOG.md          | 1 +
 lib/src/showcase.dart | 1 +
 2 files changed, 2 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 28c0013c..51fd8dd6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 ## [2.1.1]
 - Fixed [#425](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/issues/425) - Unhandled breaking change in v2.1.0
+- Fixed [#428](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/issues/428) - _ShowcaseState.recalculateRootWidgetSize null value
 
 ## [2.1.0]
 - Feature [#420](https://github.com/SimformSolutionsPvtLtd/flutter_showcaseview/pull/420) - Dart SDK Upgrade
diff --git a/lib/src/showcase.dart b/lib/src/showcase.dart
index ee53916a..598a11cd 100644
--- a/lib/src/showcase.dart
+++ b/lib/src/showcase.dart
@@ -472,6 +472,7 @@ class _ShowcaseState extends State<Showcase> {
 
   void recalculateRootWidgetSize() {
     ambiguate(WidgetsBinding.instance)?.addPostFrameCallback((_) {
+      if (!mounted) return;
       final rootWidget =
           context.findRootAncestorStateOfType<State<WidgetsApp>>();
       rootRenderObject = rootWidget?.context.findRenderObject() as RenderBox?;