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home_page.dart
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home_page.dart
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import 'dart:async';
import 'dart:typed_data';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_image_editor_example/advanced_page.dart';
import 'const/resource.dart';
import 'package:image_editor/image_editor.dart';
import 'widget/clip_widget.dart';
import 'widget/flip_widget.dart';
import 'widget/rotate_widget.dart';
class HomePage extends StatefulWidget {
@override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
ImageProvider provider;
@override
void initState() {
super.initState();
provider = AssetImage(R.ASSETS_ICON_PNG);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Simple usage"),
actions: <Widget>[
IconButton(
icon: Icon(Icons.extension),
onPressed: () => Navigator.of(context).push(MaterialPageRoute(
builder: (_) => AdvancedPage(),
)),
tooltip: "Use extended_image library",
),
IconButton(
icon: Icon(Icons.settings_backup_restore),
onPressed: restore,
tooltip: "Restore image to default.",
),
],
),
body: Column(
children: <Widget>[
AspectRatio(
aspectRatio: 1,
child: Image(
image: provider,
),
),
Expanded(
child: Scrollbar(
child: SingleChildScrollView(
child: Column(
children: <Widget>[
FlipWidget(
onTap: _flip,
),
ClipWidget(
onTap: _clip,
),
RotateWidget(
onTap: _rotate,
),
],
),
),
),
),
],
),
);
}
void setProvider(ImageProvider provider) {
this.provider = provider;
setState(() {});
}
void restore() {
setProvider(AssetImage(R.ASSETS_ICON_PNG));
}
Future<Uint8List> getAssetImage() async {
final byteData = await rootBundle.load(R.ASSETS_ICON_PNG);
return byteData.buffer.asUint8List();
}
void _flip(FlipOption flipOption) async {
handleOption([flipOption]);
}
_clip(ClipOption clipOpt) async {
handleOption([clipOpt]);
}
void _rotate(RotateOption rotateOpt) async {
handleOption([rotateOpt]);
}
void handleOption(List<Option> options) async {
ImageEditorOption option = ImageEditorOption();
for (final o in options) {
option.addOption(o);
}
final assetImage = await getAssetImage();
final result = await ImageEditor.editImage(
image: assetImage,
imageEditorOption: option,
);
final img = MemoryImage(result);
setProvider(img);
}
}
Widget buildButton(String text, Function onTap) {
return FlatButton(
child: Text(text),
onPressed: onTap,
);
}