ValueBuilder<T> class
A widget that manages local state like ObxValue, but uses a callback instead of a reactive value.
Example:
ValueBuilder<bool>(
initialValue: false,
builder: (value, update) => Switch(
value: value,
onChanged: update,
),
onUpdate: (value) => print("Value updated: $value"),
),
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- ValueBuilder
Constructors
-
ValueBuilder({required T initialValue, required ValueBuilderBuilder<
T> builder, Key? key, VoidCallback? onDispose, ValueBuilderUpdateCallback<T> ? onUpdate}) -
const
Properties
-
builder
→ ValueBuilderBuilder<
T> -
The builder function that constructs the widget based on the current value and an updater function.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- initialValue → T
-
The initial value of the state managed by the ValueBuilder.
final
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- onDispose → VoidCallback?
-
A function that is called when the ValueBuilder is disposed.
final
-
onUpdate
→ ValueBuilderUpdateCallback<
T> ? -
A function that is called when the value managed by the ValueBuilder is updated.
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(
) → ValueBuilderState< 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}) → 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