process #280

Author: xdd666t

example/lib/demo/issue274.dart

@@ -0,0 +1,51 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
+
+void main() {
+  runApp(const MyApp());
+}
+
+class MyApp extends StatelessWidget {
+  const MyApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Flutter Demo',
+      theme: ThemeData(
+          colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple)),
+      builder: FlutterSmartDialog.init(),
+      home: const MyHomePage(),
+    );
+  }
+}
+
+class MyHomePage extends StatefulWidget {
+  const MyHomePage({super.key});
+
+  @override
+  State<MyHomePage> createState() => _MyHomePageState();
+}
+
+class _MyHomePageState extends State<MyHomePage> {
+  void _incrementCounter() {}
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
+        title: const Text("Demo"),
+      ),
+      body: const Center(
+        child: SelectableText(
+            "this is a long select text to test smart dialog with copy"),
+      ),
+      floatingActionButton: FloatingActionButton(
+        onPressed: _incrementCounter,
+        tooltip: 'Increment',
+        child: const Icon(Icons.add),
+      ),
+    );
+  }
+}

lib/src/widget/helper/toast_helper.dart

@@ -33,7 +33,7 @@ class _ToastHelperState extends State<ToastHelper> with WidgetsBindingObserver {
       if (!mounted) return;
 
       final renderBox = _childContext?.findRenderObject() as RenderBox?;
-      if (renderBox != null) {
+      if (renderBox != null && renderBox.hasSize) {
         selfOffset = renderBox.localToGlobal(Offset.zero);
         selfSize = renderBox.size;
       }