DeferInit<T extends Widget?> class
Prevents the initialization of UI until the provided asynchronous task is completed.
This is done by using the deferFirstFrame() and allowFirstFrame()
functions from Flutter's RendererBinding mixin.
Use in a StatefulWidget when async initialization of a service
class is required before initState starts to build UI.
This widget was created by Simon Lightfoot and modified slightly by GroovinChip. Please view the original source here
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- DeferInit
- Annotations
Constructors
-
DeferInit({Key? key, required OnDeferInit<
T> onDefer, Widget loadingWidget = const SizedBox.shrink(), Widget emptyWidget = const SizedBox.shrink()}) -
Prevents the initialization of UI until the provided asynchronous task is
completed.
const
Properties
- emptyWidget → Widget
-
An optional Widget to display if onDefer returns null.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- loadingWidget → Widget
-
An optional Widget to display while onDefer is running.
final
-
onDefer
→ OnDeferInit<
T> -
The function to call when deferring initialization
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< DeferInit< T> > -
Creates the mutable state for this widget at a given location in the tree.
override
-
debugDescribeChildren(
) → List< DiagnosticsNode> -
Returns a list of
DiagnosticsNodeobjects 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