flutter_package / fluttertpc_get

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Jonny Borges
Committed by GitHub
98707dc1 1 parent 2db91ba0

Delete rx_obx.dart

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Showing 1 changed file with 0 additions and 119 deletions
import 'dart:async';
import 'package:flutter/widgets.dart';
import 'package:get/src/state_manager/rx/rx_core/rx_interface.dart';
import '../rx_core/rx_impl.dart';
typedef WidgetCallback = Widget Function();
/// The simplest reactive widget in GetX.
///
/// Just pass your Rx variable in the root scope of the callback to have it
/// automatically registered for changes.
///
/// final _name = "GetX".obs;
/// Obx(() => Text( _name.value )),... ;
class Obx extends StatefulWidget {
final WidgetCallback builder;
const Obx(this.builder);
_ObxState createState() => _ObxState();
}
class _ObxState extends State<Obx> {
RxInterface _observer;
StreamSubscription subs;
_ObxState() {
_observer = Rx();
}
@override
void initState() {
subs = _observer.subject.stream.listen((data) => setState(() {}));
super.initState();
}
@override
void dispose() {
subs.cancel();
_observer.close();
super.dispose();
}
Widget get notifyChilds {
final observer = getObs;
getObs = _observer;
final result = widget.builder();
if (!_observer.canUpdate) {
throw """
[Get] the improper use of a GetX has been detected.
You should only use GetX or Obx for the specific widget that will be updated.
If you are seeing this error, you probably did not insert any observable variables into GetX/Obx
or insert them outside the scope that GetX considers suitable for an update
(example: GetX => HeavyWidget => variableObservable).
If you need to update a parent widget and a child widget, wrap each one in an Obx/GetX.
""";
}
getObs = observer;
return result;
}
@override
Widget build(BuildContext context) => notifyChilds;
}
/// Similar to Obx, but manages a local state.
/// Pass the initial data in constructor.
/// Useful for simple local states, like toggles, visibility, themes,
/// button states, etc.
/// Sample:
/// ObxValue((data) => Switch(
/// value: data.value,
/// onChanged: (flag) => data.value = flag,
/// ),
/// false.obs,
/// ),
// TODO: change T to a proper Rx interface, that includes the accessor for ::value
class ObxValue<T extends RxInterface> extends StatefulWidget {
final Widget Function(T) builder;
final T data;
const ObxValue(this.builder, this.data, {Key key}) : super(key: key);
_ObxValueState createState() => _ObxValueState();
}
class _ObxValueState extends State<ObxValue> {
RxInterface _observer;
StreamSubscription subs;
_ObxValueState() {
_observer = Rx();
}
@override
void initState() {
subs = _observer.subject.stream.listen((data) => setState(() {}));
super.initState();
}
@override
void dispose() {
subs.cancel();
_observer.close();
super.dispose();
}
Widget get notifyChilds {
final observer = getObs;
getObs = _observer;
// observable is implicity taken from the constructor.
final result = widget.builder(widget.data);
getObs = observer;
return result;
}
@override
Widget build(BuildContext context) => notifyChilds;
}