WatchComputed<T> class
A widget that builds itself based on the latest value emitted by a ComputedNotifier.
The value is retrieved from the ComputedNotifier when this widget is first built, and then again whenever the ComputedNotifier emits a new value. The builder callback is called with the latest value from the ComputedNotifier whenever this widget needs to be rebuilt.
This widget is useful for building widgets that depend on the value of a ComputedNotifier.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- WatchComputed
Constructors
-
WatchComputed.new({Key? key, required Widget builder(BuildContext context, T value), required ComputedNotifier<
T> computed}) -
const
Properties
- builder → Widget Function(BuildContext context, T value)
-
final
-
computed
→ ComputedNotifier<
T> -
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- 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< WatchComputed> -
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