NmAsyncSection<T> class
Loads a value and renders it: a loading state first, then builder, or the error state with retry. A change of reloadKey reloads it (live updates re-fetch only the sections whose data changed); errors never show placeholder data.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- NmAsyncSection
Constructors
-
NmAsyncSection({Key? key, required Future<
T> load(), required Widget builder(BuildContext context, T value), Object? reloadKey, String? title, void onLoaded(T value)?, NmAsyncError? describeError(Object error)?}) -
Creates an NmAsyncSection.
const
Properties
- builder → Widget Function(BuildContext context, T value)
-
Renders the loaded value.
final
- describeError → NmAsyncError? Function(Object error)?
-
Maps a load error to its message; errors it returns null for are rethrown. Null: every error shows as text.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
-
load
→ Future<
T> Function() -
Loads the value.
final
- onLoaded → void Function(T value)?
-
Called after each successful load.
final
- reloadKey → Object?
-
Reloads when it changes (compare by
==).final - runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- title → String?
-
Section title above the content.
final
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< NmAsyncSection< 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