get_state.dart
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import 'package:flutter/material.dart';
import '../get_main.dart';
class RealState {
final State state;
final String id;
RealState({this.state, this.id});
}
class GetController extends State {
Map<GetController, List<RealState>> _allStates = {};
/// Update GetBuilder with update(this)
void update(GetController controller, [List<String> ids]) {
if (controller != null) {
if (ids == null) {
var all = _allStates[controller];
all.forEach((rs) {
if (rs.state != null && rs.state.mounted) rs.state.setState(() {});
});
} else {
ids.forEach(
(s) {
var all = _allStates[controller];
all.forEach((rs) {
if (rs.state != null && rs.state.mounted && rs.id == s)
rs.state.setState(() {});
});
},
);
}
}
}
@override
Widget build(_) => throw ("build method can't be called");
}
class GetBuilder<T extends GetController> extends StatefulWidget {
@required
final Widget Function(T) builder;
final bool global;
final String id;
final bool autoRemove;
final void Function(State state) initState, dispose, didChangeDependencies;
final void Function(GetBuilder oldWidget, State state) didUpdateWidget;
final T init;
GetBuilder({
Key key,
this.init,
this.global = true,
this.builder,
this.autoRemove = true,
this.initState,
this.dispose,
this.id,
this.didChangeDependencies,
this.didUpdateWidget,
}) : assert(builder != null),
super(key: key);
@override
_GetBuilderState<T> createState() => _GetBuilderState<T>();
}
class _GetBuilderState<T extends GetController> extends State<GetBuilder<T>> {
T controller;
@override
void initState() {
super.initState();
if (widget.global) {
if (Get.isRegistred<T>()) {
controller = Get.find<T>();
if (controller._allStates[controller] == null) {
controller._allStates[controller] = [];
}
controller._allStates[controller]
.add(RealState(state: this, id: widget.id));
} else {
controller = widget.init;
if (controller._allStates[controller] == null) {
controller._allStates[controller] = [];
}
controller._allStates[controller]
.add(RealState(state: this, id: widget.id));
Get.put<T>(controller);
}
} else {
controller = widget.init;
controller._allStates[controller]
.add(RealState(state: this, id: widget.id));
}
if (widget.initState != null) widget.initState(this);
}
@override
void dispose() {
if (widget.init != null) {
var b = controller;
if (b._allStates[controller].hashCode == this.hashCode) {
b._allStates.remove(controller);
}
} else {
var b = controller;
if (b._allStates[controller].hashCode == this.hashCode) {
b._allStates.remove(controller);
}
}
if (widget.dispose != null) widget.dispose(this);
if (widget.init != null) {
if (widget.autoRemove && Get.isRegistred<T>()) {
Get.delete<T>();
}
} else {
// controller._allStates[controller].remove(this);
controller._allStates[controller]
.remove(RealState(state: this, id: widget.id));
}
super.dispose();
}
@override
void didChangeDependencies() {
super.didChangeDependencies();
if (widget.didChangeDependencies != null)
widget.didChangeDependencies(this);
}
@override
void didUpdateWidget(GetBuilder oldWidget) {
super.didUpdateWidget(oldWidget);
if (widget.didUpdateWidget != null) widget.didUpdateWidget(oldWidget, this);
}
@override
Widget build(BuildContext context) {
return widget.builder(controller);
}
}