From 3bbc0f1b10063cb9804805e5cfbbb274d9e2f145 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=B6=85=E6=82=9F=E7=A9=BA?= <39251474@163.com>
Date: Thu, 6 Apr 2023 16:52:39 +0800
Subject: [PATCH] Update size_detector_widget.dart

Use SizeChangedLayoutNotifier to refactor
---
 lib/src/size_detector_widget.dart | 36 +++++++++++++++----------------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/lib/src/size_detector_widget.dart b/lib/src/size_detector_widget.dart
index e4f7c09..be466d5 100644
--- a/lib/src/size_detector_widget.dart
+++ b/lib/src/size_detector_widget.dart
@@ -2,41 +2,41 @@ import 'package:flutter/material.dart';
 import 'package:flutter/scheduler.dart';
 
 class SizeDetectorWidget extends StatefulWidget {
-  final Widget child;
-  final ValueChanged<Size> onSizeDetect;
-
   const SizeDetectorWidget({
     Key? key,
     required this.child,
     required this.onSizeDetect,
   }) : super(key: key);
 
+  final Widget child;
+  final ValueChanged<Size> onSizeDetect;
+
   @override
-  _SizeDetectorWidgetState createState() => _SizeDetectorWidgetState();
+  State createState() => _SizeDetectorWidgetState();
 }
 
 class _SizeDetectorWidgetState extends State<SizeDetectorWidget> {
-  Size? _oldSize;
+
+  void _listenSize() {
+    SchedulerBinding.instance?.addPostFrameCallback((_) {
+      widget.onSizeDetect(context.size!);
+    });
+  }
 
   @override
   void initState() {
     super.initState();
-    SchedulerBinding.instance?.addPostFrameCallback((_) => _detectSize());
+    _listenSize();
   }
 
   @override
   Widget build(BuildContext context) {
-    return widget.child;
-  }
-
-  void _detectSize() {
-    if (!mounted) {
-      return;
-    }
-    final size = context.size;
-    if (_oldSize != size) {
-      _oldSize = size;
-      widget.onSizeDetect(size!);
-    }
+    return NotificationListener<SizeChangedLayoutNotification>(
+      onNotification: (_) {
+        _listenSize();
+        return false;
+      },
+      child: SizeChangedLayoutNotifier(child: widget.child),
+    );
   }
 }