thumbnailer 3.1.0 
thumbnailer: ^3.1.0 copied to clipboard
4q.euPlugin that is able to generate thumbnails from files with various mime types. If thumbnail generation is not support for specific mime type, then a fallback icon is returned
import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:thumbnailer/thumbnailer.dart';
void main() {
runApp(MyApp());
}
/// example app demonstrating thumbnailer plugin
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
@override
void initState() {
super.initState();
Thumbnailer.addCustomMimeTypesToIconDataMappings(<String, IconData>{'custom/mimeType': FontAwesomeIcons.key});
}
final List<Tab> myTabs = <Tab>[
const Tab(text: 'Icons'),
const Tab(text: 'Images'),
const Tab(text: 'Creation Strategies'),
];
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: Padding(
padding: const EdgeInsets.symmetric(vertical: 10),
child: DefaultTabController(
length: myTabs.length,
child: Scaffold(
appBar: AppBar(title: TabBar(tabs: myTabs)),
body: TabBarView(
children: <Widget>[
Padding(
padding: const EdgeInsets.only(top: 5),
child: GridView.count(
crossAxisCount: 2,
children: <Widget>[
const Column(
children: <Widget>[
Thumbnail(mimeType: 'text/html', widgetSize: 100),
Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Text(
'simplest Thumbnail , only set necessary params (mimeType,widgetSize)',
overflow: TextOverflow.clip,
textAlign: TextAlign.center,
),
),
],
),
Column(
children: <Widget>[
Thumbnail(
mimeType: 'text/html',
widgetSize: 100,
decoration: WidgetDecoration(backgroundColor: Colors.blueAccent, iconColor: Colors.red),
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Text(
'Thumbnail with set background color and icon color',
overflow: TextOverflow.clip,
textAlign: TextAlign.center,
),
),
],
),
Column(
children: <Widget>[
Container(
clipBehavior: Clip.hardEdge,
decoration: const BoxDecoration(shape: BoxShape.circle),
child: Thumbnail(
mimeType: 'text/html',
widgetSize: 100,
decoration: WidgetDecoration(backgroundColor: Colors.blueAccent, iconColor: Colors.red),
),
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Text(
'Rounded style parent',
overflow: TextOverflow.clip,
textAlign: TextAlign.center,
),
),
],
),
Column(
children: <Widget>[
Thumbnail(
mimeType: 'text/html',
dataSize: 125000,
name: 'file name',
widgetSize: 100,
decoration: WidgetDecoration(backgroundColor: Colors.blueAccent, iconColor: Colors.red),
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Text(
'Thumbnail with name and dataSize',
textAlign: TextAlign.center,
overflow: TextOverflow.clip,
),
),
],
),
Column(
children: <Widget>[
Thumbnail(
mimeType: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
dataSize: 125000,
name: 'file name',
widgetSize: 100,
decoration: WidgetDecoration(backgroundColor: Colors.blueAccent, iconColor: Colors.red),
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Center(
child: Text(
'Icons are set thanks to mimeType param and map Thumbnailer._mimeTypeToIconDataMap',
overflow: TextOverflow.clip,
textAlign: TextAlign.center,
),
),
),
],
),
Column(
children: <Widget>[
Thumbnail(
mimeType: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
dataSize: 125000,
name: 'file name',
widgetSize: 100,
decoration: WidgetDecoration(
backgroundColor: Colors.blueAccent,
iconColor: Colors.red,
textColor: Colors.red,
wrapperBgColor: Colors.black,
),
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Text(
'Thumbnail with set text color and wrapper color',
overflow: TextOverflow.clip,
textAlign: TextAlign.center,
),
),
],
),
Column(
children: <Widget>[
Thumbnail(
mimeType: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
dataSize: 125000,
name: 'file name',
widgetSize: 100,
onlyName: true,
decoration: WidgetDecoration(backgroundColor: Colors.blueAccent, iconColor: Colors.red),
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Center(
child: Text(
'parameter onlyName set to true to allow gracefull degradation',
overflow: TextOverflow.clip,
textAlign: TextAlign.center,
),
),
),
],
),
Column(
children: <Widget>[
Thumbnail(
mimeType: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
dataSize: 125000,
name: 'file name',
widgetSize: 100,
decoration: WidgetDecoration(
backgroundColor: Colors.blueAccent,
iconColor: Colors.red,
textColor: Colors.red,
wrapperSize: 120,
wrapperBgColor: Colors.black,
),
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Text(
'Thumbnail with wrapper size set',
textAlign: TextAlign.center,
overflow: TextOverflow.clip,
),
),
],
),
],
),
),
Padding(
padding: const EdgeInsets.only(top: 5),
child: GridView.count(
crossAxisCount: 2,
children: <Widget>[
Column(
children: <Widget>[
Thumbnail(
dataResolver: () async {
return (await DefaultAssetBundle.of(
context,
).load('assets/samples/png-sample.png')).buffer.asUint8List();
},
mimeType: 'image/png',
widgetSize: 100,
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Text('png image', overflow: TextOverflow.clip, textAlign: TextAlign.center),
),
],
),
Column(
children: <Widget>[
Thumbnail(
dataResolver: () async {
return (await DefaultAssetBundle.of(
context,
).load('assets/samples/png-sample.png')).buffer.asUint8List();
},
mimeType: 'image/png',
widgetSize: 100,
dataSize: 12345,
name: 'png',
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Text(
'png image with data size and name set',
overflow: TextOverflow.clip,
textAlign: TextAlign.center,
),
),
],
),
Column(
children: <Widget>[
Thumbnail(
dataResolver: () async {
return (await DefaultAssetBundle.of(
context,
).load('assets/samples/jpg-sample.jpg')).buffer.asUint8List();
},
mimeType: 'image/jpg',
widgetSize: 100,
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Text('jpg image', overflow: TextOverflow.clip, textAlign: TextAlign.center),
),
],
),
Column(
children: <Widget>[
Thumbnail(
dataResolver: () async {
return (await DefaultAssetBundle.of(
context,
).load('assets/samples/jpg-sample.jpg')).buffer.asUint8List();
},
mimeType: 'image/jpg',
decoration: WidgetDecoration(wrapperBgColor: Colors.deepOrange, wrapperSize: 110),
widgetSize: 100,
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Text(
'jpg image with wrapper and wrapper color',
overflow: TextOverflow.clip,
textAlign: TextAlign.center,
),
),
],
),
Column(
children: <Widget>[
Thumbnail(
dataResolver: () async {
return (await DefaultAssetBundle.of(
context,
).load('assets/samples/jpg-sample.jpg')).buffer.asUint8List();
},
mimeType: 'image/jpg',
onlyIcon: true,
decoration: WidgetDecoration(wrapperBgColor: Colors.deepOrange, wrapperSize: 110),
widgetSize: 100,
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Text(
'jpg with flag preferIcon set to true',
overflow: TextOverflow.clip,
textAlign: TextAlign.center,
),
),
],
),
Column(
children: <Widget>[
Thumbnail(
dataResolver: () async {
return (await DefaultAssetBundle.of(
context,
).load('assets/samples/png-sample.png')).buffer.asUint8List();
},
mimeType: 'image/png',
onlyIcon: true,
dataSize: 12345,
name: 'png',
widgetSize: 100,
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Text(
'png with flag preferIcon set to true',
overflow: TextOverflow.clip,
textAlign: TextAlign.center,
),
),
],
),
],
),
),
Padding(
padding: const EdgeInsets.only(top: 5),
child: GridView.count(
crossAxisCount: 1,
children: <Widget>[
Column(
children: <Widget>[
Thumbnail(
dataResolver: () async {
return (await DefaultAssetBundle.of(
context,
).load('assets/samples/png-sample.png')).buffer.asUint8List();
},
mimeType: 'image/png',
widgetSize: 300,
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Text(
'in basic implementation there are 3 creation strategies, 1st is for images',
overflow: TextOverflow.clip,
textAlign: TextAlign.center,
),
),
],
),
Column(
children: <Widget>[
Thumbnail(
dataResolver: () async {
return (await DefaultAssetBundle.of(
context,
).load('assets/samples/pdf-sample.pdf')).buffer.asUint8List();
},
mimeType: 'application/pdf',
widgetSize: 300,
decoration: WidgetDecoration(wrapperBgColor: Colors.blueAccent),
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Text(
'2nd is for pdf files (blue on edges is colored wrapper)',
overflow: TextOverflow.clip,
textAlign: TextAlign.center,
),
),
],
),
Column(
children: <Widget>[
Thumbnail(
dataResolver: () async {
return (await DefaultAssetBundle.of(
context,
).load('assets/samples/xlsx-sample.xlsx')).buffer.asUint8List();
},
mimeType: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
widgetSize: 300,
decoration: WidgetDecoration(wrapperBgColor: Colors.blueAccent),
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Text(
'3rd is for xlsx and odt files',
overflow: TextOverflow.clip,
textAlign: TextAlign.center,
),
),
],
),
Column(
children: <Widget>[
Thumbnail(
errorBuilder: (BuildContext buildContext, Exception error) {
return Container(
height: 200,
color: Colors.blue,
child: const Center(child: Text('Cannot load file contents')),
);
},
dataResolver: () async {
throw Error();
},
mimeType: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
widgetSize: 300,
decoration: WidgetDecoration(wrapperBgColor: Colors.blueAccent),
),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 7),
child: Text(
'On top of that, you can also define custom error behaviour',
overflow: TextOverflow.clip,
textAlign: TextAlign.center,
),
),
],
),
],
),
),
],
),
),
),
),
),
);
}
}Metadata
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Metadata
Plugin that is able to generate thumbnails from files with various mime types. If thumbnail generation is not support for specific mime type, then a fallback icon is returned
Documentation
License
MIT (license)
Dependencies
flutter, flutter_web_plugins, font_awesome_flutter, pdfx, spreadsheet_decoder, win32
