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refactor: split app wrapper from focused example code (multi-file apps)

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Convert 17 multi-file apps to the validated pattern: lib/main.dart keeps
only the MaterialApp bootstrap; a new lib/example.dart holds the full entry
screen and focused example code, importing existing supporting files
(screens/, tabs/, services/, models/, widgets/, utils/).

Apps: analytics_integration, animation_example, biometrics, bottom_sheet,
custom_home_drawer, google_signin, grid_layout, handling_routes,
image_editor, scan_qr_code, statless_counter_app, using_bottom_nav_bar,
using_custom_fonts, using_listview, using_listwheelscrollview,
using_platform_adaptive, view_pdf_file
This commit is contained in:
Nishant Srivastava
2026-08-18 00:48:50 +02:00
parent 780c0f1dbb
commit 6e3ff94bfe
34 changed files with 1002 additions and 766 deletions
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152
animation_example/lib/example.dart Normal file
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// Example: A compass-like animation demo where tapping rotates a pen image
// and points it toward a direction (north/west/south/east).
import 'package:flutter/material.dart';
class Example extends StatefulWidget {
const Example({super.key});
@override
_ExampleState createState() => _ExampleState();
}
class _ExampleState extends State<Example> with SingleTickerProviderStateMixin {
late AnimationController controller;
var target = 0.0;
final Map<double, String> data = {
0.25: "north",
0.50: "west",
0.75: "south",
1.00: 'east'
};
@override
void initState() {
super.initState();
controller = AnimationController(
vsync: this,
duration: const Duration(milliseconds: 900),
);
}
@override
Widget build(BuildContext context) {
Size size = MediaQuery.of(context).size;
showResult(double target) {
final snak = SnackBar(
content: Text(
"Pen is pointed to ${data[target]}",
style: const TextStyle(
fontSize: 20, fontWeight: FontWeight.w500, color: Colors.green),
),
duration: const Duration(seconds: 2),
);
ScaffoldMessenger.of(context).showSnackBar(snak);
}
return Scaffold(
backgroundColor: Colors.white,
body: SizedBox(
width: double.infinity,
height: size.height,
child: Stack(
alignment: Alignment.center,
children: [
Positioned(
top: 80,
child: TextButton(
onPressed: () {},
style: ButtonStyle(
backgroundColor: WidgetStateProperty.all(Colors.green)),
child: const Text(
"North",
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.w500,
color: Colors.white),
))),
Positioned(
top: size.height * 0.48,
left: -15,
child: Transform.rotate(
angle: 190.1,
child: TextButton(
onPressed: () {},
style: ButtonStyle(
backgroundColor:
WidgetStateProperty.all(Colors.green)),
child: const Text(
"East",
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.w500,
color: Colors.white),
)),
)),
Positioned(
top: size.height * 0.48,
right: -15,
child: Transform.rotate(
angle: -190.1,
child: TextButton(
onPressed: () {},
style: ButtonStyle(
backgroundColor:
WidgetStateProperty.all(Colors.green)),
child: const Text(
"West",
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.w500,
color: Colors.white),
)),
)),
Positioned(
bottom: 80,
child: TextButton(
onPressed: () {},
style: ButtonStyle(
backgroundColor: WidgetStateProperty.all(Colors.green)),
child: const Text(
"North",
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.w500,
color: Colors.white),
))),
AnimatedBuilder(
animation: controller,
child: Container(
child: GestureDetector(
onTap: () {
setState(() {
controller.repeat();
});
Future.delayed(Duration(seconds: 10), () {
setState(() {
target += 0.25;
controller.animateTo(target,
duration: Duration(seconds: 1));
showResult(target);
if (target == 1.00) {
target = 0.0;
}
});
});
},
child: Image.asset(
'assets/images/penimg2.png',
width: size.width * 0.5,
)),
),
builder: (context, Widget? widget) {
return Transform.rotate(
angle: controller.value * 2 * 3.14,
child: widget,
);
},
),
],
),
),
);
}
}