image_resizer 1.0.0+1 image_resizer: ^1.0.0+1 copied to clipboard
A crossplatform general image resizer based on flutter_launcher_icons
import 'dart:io';
import 'dart:typed_data';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:image/image.dart' as image;
import 'package:image_resizer/image_resizer.dart';
import 'package:universal_html/html.dart' as html;
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
title: 'Flutter Icon Resizer',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: HomeScreen(),
);
}
}
class HomeScreen extends StatefulWidget {
@override
_HomeScreenState createState() => _HomeScreenState();
}
class _HomeScreenState extends State<HomeScreen> {
Map<String, List<FileData>> _files;
List<int> _imageData;
bool _loading = false;
@override
void initState() {
rootBundle.load("web/icons/Icon-512.png").then((bytes) async {
_imageData = bytes.buffer.asUint8List();
_refresh();
});
super.initState();
}
Future _refresh() async {
_files = {};
_setLoading(true);
await _generateIcons('iOS Icons', IosIconsFolder());
await _generateIcons('Web Icons', WebIconsFolder());
await _generateIcons('MacOS Icons', MacOSIconsFolder());
await _generateIcons('Android Icons', AndroidIconsFolder());
_setLoading(false);
}
void _setLoading(bool value) {
if (mounted)
setState(() {
_loading = value;
});
}
Future _generateIcons(String key, ImageFolder folder) async {
final _image = image.decodePng(_imageData);
final _gen = IconGenerator();
final _archive =
await _gen.generateIcons(_image, folder, writeToDiskIO: false);
if (mounted)
setState(() {
_files[key] = _archive;
});
}
Future _archive() async {
final _gen = IconGenerator();
List<FileData> _images = [];
for (var key in _files.keys) {
final _folder = _files[key];
_images.addAll(_folder.toList());
}
print("Images: ${_images.length}");
final _data = _gen.generateArchive(_images);
await saveFile('images.zip', binaryData: _data);
}
Future<bool> saveFile(
String fileName, {
String initialDirectoryDesktop,
List<int> binaryData,
bool silentErrors = false,
}) async {
if (kIsWeb) {
Uri dataUrl;
try {
if (binaryData != null) {
dataUrl = Uri.dataFromBytes(binaryData);
}
} catch (e) {
if (!silentErrors) {
throw Exception("Error Creating File Data: $e");
}
return false;
}
final _element = html.AnchorElement()
..href = dataUrl.toString()
..setAttribute("download", fileName);
_element.click();
return true;
}
final _file = File(fileName)..createSync();
_file.writeAsBytesSync(binaryData);
return true;
}
Future _upload() async {
_setLoading(true);
final _upload = html.FileUploadInputElement();
_upload.accept = 'image/*';
_upload.click();
final _file = await _upload.onChange.first;
if (_file != null) {
List<html.File> files = (_file.target as dynamic).files;
final f = files.first;
final reader = new html.FileReader();
reader.readAsArrayBuffer(f);
await reader.onLoadEnd.first;
_imageData = reader.result as List<int>;
_refresh();
}
_setLoading(false);
return;
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Image Resizer'),
actions: <Widget>[
if (kIsWeb) ...[
IconButton(
icon: Icon(Icons.file_upload),
onPressed: _loading ? null : _upload,
),
],
IconButton(
icon: Icon(Icons.archive),
onPressed: _archive,
),
],
),
body: _files != null
? ListView.separated(
separatorBuilder: (context, index) => Container(
height: 1.0,
color: Colors.grey,
),
itemCount: _files.keys.length,
itemBuilder: (context, index) {
final _key = _files.keys.toList()[index];
final _folder = _files[_key];
return Padding(
padding: const EdgeInsets.all(8.0),
child: Column(
children: <Widget>[
Text(
_key,
style: Theme.of(context).textTheme.headline4,
),
Padding(
padding: const EdgeInsets.all(8.0),
child: Wrap(
children: _folder.map((file) {
return Padding(
padding: const EdgeInsets.all(8.0),
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Container(
height: 200.0,
width: 200.0,
child: Card(
child: Image.memory(
Uint8List.fromList(file.data),
),
),
),
Text(file.name),
],
),
);
}).toList(),
),
),
],
),
);
},
)
: Center(child: CircularProgressIndicator()),
floatingActionButton: FloatingActionButton(
onPressed: _refresh,
tooltip: 'Generate Icons',
child: Icon(Icons.refresh),
),
);
}
}