ValueBuilder<T> class
Example:
ValueBuilder<T>(
initial: T,
builder: (BuildContext context, T value, ValueCallback<T> update) {
return (你需要局部刷新的组件)
}),
onUpdate: (value) => print("Value updated: $value"),
),
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- ExtendedStatefulWidget
- ValueBuilder
- Available extensions
Constructors
-
ValueBuilder({Key? key, required ValueBuilderCallback<
T> builder, T? initial, ValueCallback<T?> ? onUpdate, ValueCallback<BuildContext> ? initState, ValueCallback<BuildContext> ? didChangeDependencies, ValueCallback<BuildContext> ? didUpdateWidget, ValueCallback<BuildContext> ? deactivate, ValueCallback<BuildContext> ? dispose}) -
const
Properties
-
builder
→ ValueBuilderCallback<
T> -
builder
final
-
deactivate
→ ValueCallback<
BuildContext> ? -
deactivate
finalinherited
-
didChangeDependencies
→ ValueCallback<
BuildContext> ? -
didChangeDependencies
finalinherited
-
didUpdateWidget
→ ValueCallback<
BuildContext> ? -
didUpdateWidget
finalinherited
-
dispose
→ ValueCallback<
BuildContext> ? -
dispose
finalinherited
- hashCode → int
-
The hash code for this object.
no setterinherited
- initial → T?
-
final
-
initState
→ ValueCallback<
BuildContext> ? -
initState
finalinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
-
onUpdate
→ ValueCallback<
T?> ? -
onUpdate
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< ValueBuilder< 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