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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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129
image_editor/lib/example.dart Normal file
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@@ -0,0 +1,129 @@
// Example: Image editor screen
import 'package:flutter/material.dart';
import 'package:image_editor/ApplyFilters.dart';
import 'package:image_editor/EditImg.dart';
import 'package:image_editor/GetImg.dart';
import 'package:image_editor/SaveInGallery.dart';
import 'dart:io';
class Example extends StatefulWidget {
const Example({super.key});
@override
_ExampleState createState() => _ExampleState();
}
class _ExampleState extends State<Example> {
bool _selected = false; //to check if a image is selected or not
late File
_image; //here we will store the selected image and apply modifications
final double _ImageContainerHeight = 450;
final double _ImageContainerWidth = 400;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.greenAccent[400],
title: Text('Flutter Image Editor'),
),
body: Container(
child: Column(
children: <Widget>[
SizedBox(
height: _ImageContainerHeight,
width: _ImageContainerWidth,
child: _selected // checks if a image is selected or not
? Image.file(_image)
: Image.asset('images/cam.png')),
Row(
children: <Widget>[
Spacer(
flex: 2,
),
ElevatedButton(
style: ElevatedButton.styleFrom(
backgroundColor: Colors.greenAccent[400]),
child: Text(
'Get_Image', // to select a image from gallery
style: TextStyle(color: Colors.white),
),
onPressed: () async {
var Ifile = await GetiImg(
_image); // function called from GetImg.dart
if (Ifile != null) {
setState(() {
_image = Ifile;
_selected = true;
});
}
}),
Spacer(
flex: 1,
),
ElevatedButton(
style: ElevatedButton.styleFrom(
backgroundColor: Colors.greenAccent[400]),
child: Text(
'Edit Image', //to start editing the shape, size, etc of the selected image
style: TextStyle(color: Colors.white),
),
onPressed: () async {
var Ifile0 = await EditImg(
_image); // function called from EditImg.dart
if (Ifile0 != null) {
setState(() {
_image = Ifile0;
});
}
}),
Spacer(
flex: 2,
),
],
),
Row(
children: <Widget>[
Spacer(
flex: 2,
),
ElevatedButton(
style: ElevatedButton.styleFrom(
backgroundColor: Colors.greenAccent[400]),
child: Text(
'Apply Filters', //to start apply various photo filters to the selected image
style: TextStyle(color: Colors.white),
),
onPressed: () async {
var Ifile0 = await ApplyFilters(context,
_image); // function called from ApplyFilters.dart
if (Ifile0 != null) {
setState(() {
_image = Ifile0;
});
}
}),
Spacer(
flex: 1,
),
ElevatedButton(
style: ElevatedButton.styleFrom(
backgroundColor: Colors.greenAccent[400]),
child: Text(
'Download Editted image', //to save the edited image to gallery
style: TextStyle(color: Colors.white),
),
onPressed: () async {
await SaveImg(
_image); // function called from SaveInGallery.dart
}),
Spacer(
flex: 2,
),
],
),
],
)),
);
}
}

10
image_editor/lib/main.dart
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@@ -1,8 +1,8 @@
import 'package:flutter/material.dart';
import 'package:image_editor/HomePage.dart';
import 'package:image_editor/example.dart';
void main() {
runApp(MyApp());
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
@@ -11,10 +11,8 @@ class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
home: HomePage()
return const MaterialApp(
home: Example(),
);
}
}