one_context 0.1.0 
one_context: ^0.1.0 copied to clipboard
Dialogs, Overlays and Navigations without BuildContext
import 'dart:math';
import 'package:one_context/one_context.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
/// important: Use [OneContext().builder] in MaterialApp builder, in order to show dialogs and overlays.
/// important: Use [OneContext().key] in MaterialApp navigatorKey, in order to navigate.
return MaterialApp(
builder: OneContext().builder,
navigatorKey: OneContext().key,
// builder: (context, widget) => OneContext().builder(context, widget, mediaQueryData: MediaQuery.of(context).copyWith(textScaleFactor: 1.0)),
title:
'OneContext Demo - Dialogs, Overlays and Navigations without BuildContext',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'OneContext Demo'),
routes: {
'/second': (context) => SecondPage(),
},
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage>
with SingleTickerProviderStateMixin {
Map<String, Offset> randomOffset = Map<String, Offset>();
AnimationController _controller;
Animation<Offset> _offsetAnimation;
@override
void initState() {
super.initState();
_controller = AnimationController(
duration: const Duration(milliseconds: 1000),
vsync: this,
);
_offsetAnimation = Tween<Offset>(
begin: Offset(0, -1),
end: const Offset(0, 0),
).animate(CurvedAnimation(
parent: _controller,
curve: Curves.easeInOutCubic,
));
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: SingleChildScrollView(
child: Container(
alignment: Alignment.center,
padding: EdgeInsets.all(16),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
SizedBox(height: 100),
RaisedButton(
child: Text('Show SnackBar'),
onPressed: () {
showTipsOnScreen('OneContext().showSnackBar()');
OneContext()
.dismissSnackBar(); // Dismiss snackbar before show another ;)
OneContext().showSnackBar(
builder: (context) => SnackBar(
content: Text(
'My awesome snackBar!',
textAlign: TextAlign.center,
style: Theme.of(context)
.textTheme
.title
.copyWith(color: Colors.white),
),
action: SnackBarAction(
label: 'DISMISS', onPressed: () {}),
));
},
),
RaisedButton(
child: Text('Show Dialog'),
onPressed: () async {
showTipsOnScreen('OneContext().showDialog<String>()');
var result = await OneContext().showDialog<String>(
// Don't need context to show alertDialog
builder: (context) => AlertDialog(
title: new Text("The Title"),
content: new Text("The Body"),
actions: <Widget>[
new FlatButton(
child: new Text("OK"),
onPressed: () =>
OneContext().popDialog('ok')),
new FlatButton(
child: new Text("CANCEL"),
onPressed: () =>
OneContext().popDialog('cancel')),
],
));
print(result);
},
),
RaisedButton(
child: Text('Show modalBottomSheet'),
onPressed: () async {
showTipsOnScreen(
'OneContext().showModalBottomSheet<String>()');
var result = await OneContext().showModalBottomSheet<String>(
builder: (context) => Container(
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
ListTile(
leading: Icon(Icons.music_note),
title: Text('Music'),
onTap: () =>
OneContext().popDialog('Music')),
ListTile(
leading: Icon(Icons.videocam),
title: Text('Video'),
onTap: () =>
OneContext().popDialog('Video')),
SizedBox(height: 45)
],
),
));
print(result);
},
),
RaisedButton(
child: Text('Show bottomSheet'),
onPressed: () {
showTipsOnScreen('OneContext().showBottomSheet()');
OneContext().showBottomSheet(
builder: (context) => Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.all(Radius.circular(10)),
color: Colors.red,
),
margin: EdgeInsets.all(16),
alignment: Alignment.topCenter,
height: 200,
child: IconButton(
icon: Icon(Icons.arrow_drop_down),
iconSize: 50,
color: Colors.white,
onPressed: () => OneContext().popDialog()),
),
);
},
),
RaisedButton(
child: Text('Show and block till input'),
onPressed: () async {
showTipsOnScreen('OneContext().showDialog<int>()');
switch (await OneContext().showDialog<int>(
barrierDismissible: false,
builder: (BuildContext context) {
return SimpleDialog(
shape: RoundedRectangleBorder(
borderRadius:
BorderRadius.all(Radius.circular(10))),
title: const Text('Select assignment'),
children: <Widget>[
SimpleDialogOption(
onPressed: () {
OneContext().popDialog(1);
},
child: const Text('Number 1'),
),
SimpleDialogOption(
onPressed: () {
OneContext().popDialog(2);
},
child: const Text('Number 2'),
),
],
);
})) {
case 1:
print('number one');
break;
case 2:
print('number two');
break;
}
}),
RaisedButton(
child: Text('Show default progress indicator'),
onPressed: () {
showTipsOnScreen('OneContext().showProgressIndicator()');
OneContext().showProgressIndicator();
Future.delayed(Duration(seconds: 2),
() => OneContext().hideProgressIndicator());
},
),
RaisedButton(
child: Text('Show progress indicator colored'),
onPressed: () {
showTipsOnScreen(
'OneContext().showProgressIndicator(backgroundColor, circularProgressIndicatorColor)');
OneContext().showProgressIndicator(
backgroundColor: Colors.blue.withOpacity(.3),
circularProgressIndicatorColor: Colors.white);
Future.delayed(Duration(seconds: 2),
() => OneContext().hideProgressIndicator());
},
),
RaisedButton(
child: Text('Show custom progress indicator'),
onPressed: () {
showTipsOnScreen(
'OneContext().showProgressIndicator(builder)');
OneContext().showProgressIndicator(
builder: (_) => SlideTransition(
position: _offsetAnimation,
child: Container(
padding: EdgeInsets.only(top: 120),
alignment: Alignment.topCenter,
child: Container(
alignment: Alignment.center,
height: 60,
width: 60,
decoration: BoxDecoration(
color: Colors.yellow,
borderRadius: BorderRadius.circular(30),
),
child: CircularProgressIndicator()),
),
),
backgroundColor: Colors.transparent);
_controller.reset();
_controller.forward();
Future.delayed(Duration(seconds: 3), () {
_controller.reverse().whenComplete(
() => OneContext().hideProgressIndicator());
});
},
),
RaisedButton(
child: Text('Add an generic overlay'),
onPressed: () {
showTipsOnScreen('OneContext().addOverlay(builder)');
String overId = UniqueKey().toString();
double getY() => Random()
.nextInt(
(MediaQuery.of(context).size.height - 50).toInt())
.toDouble();
double getX() => Random()
.nextInt((MediaQuery.of(context).size.width - 50).toInt())
.toDouble();
randomOffset.putIfAbsent(
overId, () => Offset(getX(), getY()));
Widget w = RaisedButton(
child: Text(
'CLOSE OR DRAG',
style: TextStyle(color: Colors.white),
),
color: Colors.blue,
onPressed: () {
OneContext().removeOverlay(overId);
});
OneContext().addOverlay(
builder: (_) => Positioned(
top: randomOffset[overId].dy,
left: randomOffset[overId].dx,
child: Draggable(
onDragEnd: (DraggableDetails detail) =>
randomOffset[overId] = detail.offset,
childWhenDragging: Container(),
child: w,
feedback: w,
)),
overlayId: overId);
},
),
RaisedButton(
child: Text('Push a second page (push)'),
onPressed: () async {
showTipsOnScreen('OneContext().push()');
String result = await OneContext().push<String>(
MaterialPageRoute(builder: (_) => SecondPage()));
print('$result from OneContext().push()');
},
),
RaisedButton(
child: Text('Push a second page (pushNamed)'),
onPressed: () async {
showTipsOnScreen('OneContext().pushNamed()');
Object result = await OneContext().pushNamed('/second');
print('$result from OneContext().pushNamed()');
},
),
SizedBox(height: 24),
Text(
'Dialogs, Overlays and Navigations without BuildContext.',
textAlign: TextAlign.center,
style: TextStyle(fontSize: 22),
)
],
),
),
),
);
}
}
class SecondPage extends StatelessWidget {
@override
Widget build(BuildContext context) => Scaffold(
appBar: AppBar(),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text('Second Page'),
RaisedButton(
child: Text('Go Back - pop("success")'),
onPressed: () {
showTipsOnScreen('OneContext().pop("success")');
OneContext.instance.pop('success');
},
),
],
)));
}
// Dont need context, so features can be create in any place ;)
void showTipsOnScreen(String text) {
String id = UniqueKey().toString();
OneContext().addOverlay(
overlayId: id,
builder: (_) => Align(
alignment: Alignment.topCenter,
child: Container(
alignment: Alignment.bottomCenter,
padding: EdgeInsets.symmetric(
horizontal: kFloatingActionButtonMargin, vertical: 8),
child: FlatButton(
onPressed: null,
child: Text(
text,
style: TextStyle(color: Colors.white, fontSize: 16),
),
),
color: Colors.red,
height: 100,
width: double.infinity),
),
);
Future.delayed(Duration(seconds: 2), () => OneContext().removeOverlay(id));
}Metadata
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Dialogs, Overlays and Navigations without BuildContext
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