createFlutter: overwrite useless main.dart

createFlutter

@@ -274,6 +274,84 @@ $description
 EOF
 
 
+#########################
+## overwrite main.dart ##
+#########################
+cat > lib/main.dart <<EOF
+import 'package:flutter/material.dart';
+
+void main() => runApp(MyApp());
+
+class MyApp extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: '$appName',
+      theme: ThemeData(
+        primarySwatch: Colors.blue,
+      ),
+      home: MyHomePage(title: '$appName'),
+    );
+  }
+}
+
+class MyHomePage extends StatefulWidget {
+  MyHomePage({Key key, this.title}) : super(key: key);
+  final String title;
+
+  @override
+  _MyHomePageState createState() => _MyHomePageState();
+}
+
+class _MyHomePageState extends State<MyHomePage> {
+  int state = 1;
+  
+  void _changeState(int s) {
+    setState(() {
+      state = s;
+    });
+  }
+
+  List<String> popupMenuItems = ["About"];
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(widget.title),
+        actions: <Widget>[
+          PopupMenuButton<String>(
+            onSelected: (String value) => handleClick(context, value),
+            itemBuilder: (BuildContext context) {
+              return popupMenuItems.map((String choice) {
+                return PopupMenuItem<String>(
+                  value: choice,
+                  child: Text(choice),
+                );
+              }).toList();
+            },
+          ),
+        ],
+      ),
+      body: Padding(
+        padding: const EdgeInsets.all(8.0),
+        child: ListView(children: [
+          Text("Lorem ipsum dolor sit amet"),
+        ]),
+      ),
+    );
+  }
+
+  void handleClick(BuildContext context, String value) {
+    switch (value) {
+      case 'About':
+        showLicensePage(context: context, applicationName: widget.title);
+    }
+  }
+}
+EOF
+
+
 #####################
 ## create Makefile ##
 #####################