ScopedModelDescendant<T extends Model> class
Finds a specific Model provided by a ScopedModel Widget and rebuilds whenever the Model changes.
Provides an option to disable rebuilding when the Model changes.
Provide a constant child Widget if some portion inside the builder does not rely on the Model and should not be rebuilt.
Example
ScopedModel<CounterModel>(
model: CounterModel(),
child: ScopedModelDescendant<CounterModel>(
child: Text('Button has been pressed:'),
builder: (context, child, model) {
return Column(
children: [
child,
Text('${model.counter}'),
],
);
}
),
);
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatelessWidget
- ScopedModelDescendant
Constructors
-
ScopedModelDescendant({required ScopedModelDescendantBuilder<
T> builder, Widget? child, bool rebuildOnChange = true}) - Creates the ScopedModelDescendant
Properties
-
builder
→ ScopedModelDescendantBuilder<
T> -
Builds a Widget when the Widget is first created and whenever
the Model changes if rebuildOnChange is set to
true
.final - child → Widget?
-
An optional constant child that does not depend on the model. This will
be passed as the child of builder.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- rebuildOnChange → bool
-
An optional value that determines whether the Widget will rebuild when
the model changes.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
build(
BuildContext context) → Widget -
Describes the part of the user interface represented by this widget.
override
-
createElement(
) → StatelessElement -
Creates a StatelessElement to manage this widget's location in the tree.
inherited
-
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}) → 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