ViewModelProvider<T extends Service> class
Provider for screen-scoped ViewModels (factory services).
- Registers the ViewModel as a named service (shows in devtools)
- Disposes automatically when the widget is removed
- Children access via
ViewModelProvider.of<T>(context)
// Wrap your screen
ViewModelProvider<ProductViewModel>(
name: 'product-123',
create: (ref) => ProductViewModel(productId: '123'),
child: ProductScreen(),
)
// Access in children
final vm = ViewModelProvider.of<ProductViewModel>(context);
final price = useValueListenable(vm.price);
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- ViewModelProvider
Constructors
- ViewModelProvider({Key? key, required String name, required T create(ServiceRef ref), required Widget child, Widget? loading})
-
const
Properties
- child → Widget
-
Child widget tree
final
- create → T Function(ServiceRef ref)
-
Factory to create the ViewModel
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- loading → Widget?
-
Optional loading widget while ViewModel initializes
final
- name → String
-
Unique name for this ViewModel instance (e.g., 'product-123')
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< ViewModelProvider< T> > -
Creates the mutable state for this widget at a given location in the tree.
override
-
debugDescribeChildren(
) → List< DiagnosticsNode> -
Returns a list of DiagnosticsNode objects describing this node's
children.
inherited
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node.
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toDiagnosticsNode(
{String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode -
Returns a debug representation of the object that is used by debugging
tools and by DiagnosticsNode.toStringDeep.
inherited
-
toString(
{DiagnosticLevel minLevel = DiagnosticLevel.info}) → String -
A string representation of this object.
inherited
-
toStringDeep(
{String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String -
Returns a string representation of this node and its descendants.
inherited
-
toStringShallow(
{String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String -
Returns a one-line detailed description of the object.
inherited
-
toStringShort(
) → String -
A short, textual description of this widget.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Methods
-
maybeOf<
T extends Service> (BuildContext context) → T? - Try to get ViewModel from context (returns null if not found)
-
of<
T extends Service> (BuildContext context) → T - Get ViewModel from context