vmobject

Description:

vmobject

Base classes used to build Flutter project follow pattern MVVM

Classes #
ObserverWidget #
A widget auto rebuild every time the observable changed
//define observable in viewmodel
final count = Observable(0);
//used in build context
ObserverWidget(
observable: count,
builder: (context, int value) => Text('$value')
)

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Dependency on library obsobject
ObserverFormField #
A widget used to input value for an observable. It can be use for value String, int, double, DateTime.
//define observable in viewmodel
final name = Observable('');
//used in build context
ObserverFormField(
observable: name,
formatter: ...,//optional
//other options of TextField
)

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This input field has property formatter used to format/parse value while user typing, default it created formatter for int, double, DateTime with recommend properties.
Build-in some class formatters:

NumberTextFormatter: use to format number for observable type int, double
DateTimeFormatter: use to format for observable type DateTime
MaskTextFormatter: use like as masked input

ViewModel #
Base class for viewmodel layer
class HomeModel extends ViewModel {
//somethings...
}
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In somewhere, you can use ViewModel.of to get created objects already
final home = ViewModel.of<HomeModel>();
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Lifecycle events call below functions, you can overwrite these functions to handle something (subscribe, create computed objects, fetch data,...)

activate: called before render widget
dispose: called after widget removed

ViewWidget #
Base class for view layer. There are 2 methods should override initModel and builder
By default, the viewmodel for view is initialized only once and cached. You can override property cacheModel to false to ignore use cache viewmodel (eg: login view).
class HomeView extends ViewWidget<HomeModel> {
@override
HomeModel initModel() => HomeModel();

@override
Widget builder(BuildContext context, HomeModel model) {
//return widget
}
}
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