SliverAnimatedListState class Null safety
The state for a sliver that animates items when they are inserted or removed.
When an item is inserted with insertItem an animation begins running. The animation is passed to SliverAnimatedList.itemBuilder whenever the item's widget is needed.
When an item is removed with removeItem its animation is reversed. The removed item's animation is passed to the removeItem builder parameter.
An app that needs to insert or remove items in response to an event can refer to the SliverAnimatedList's state with a global key:
GlobalKey<SliverAnimatedListState> listKey = GlobalKey<SliverAnimatedListState>();
...
SliverAnimatedList(key: listKey, ...);
...
listKey.currentState.insert(123);
SliverAnimatedList item input handlers can also refer to their SliverAnimatedListState with the static SliverAnimatedList.of method.
- Inheritance
-
- Object
- State<
SliverAnimatedList> - SliverAnimatedListState
- Mixed in types
Constructors
Properties
- context → BuildContext
-
The location in the tree where this widget builds.
read-onlyinherited
- hashCode → int
-
The hash code for this object.
read-onlyinherited
- mounted → bool
-
Whether this State object is currently in a tree.
read-onlyinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
read-onlyinherited
- widget → SliverAnimatedList
-
The current configuration.
read-onlyinherited
Methods
-
activate(
) → void -
Called when this object is reinserted into the tree after having been
removed via deactivate.
inherited
-
build(
BuildContext context) → Widget -
Describes the part of the user interface represented by this widget.
override
-
createTicker(
TickerCallback onTick) → Ticker -
Creates a ticker with the given callback.
inherited
-
deactivate(
) → void - Called when this object is removed from the tree.
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node.
inherited
-
didChangeDependencies(
) → void - Called when a dependency of this State object changes.
-
didUpdateWidget(
covariant SliverAnimatedList oldWidget) → void - Called whenever the widget configuration changes.
-
dispose(
) → void -
Called when this object is removed from the tree permanently.
override
-
initState(
) → void -
Called when this object is inserted into the tree.
override
-
insertItem(
int index, {Duration duration = _kDuration}) → void -
Insert an item at
indexand start an animation that will be passed to SliverAnimatedList.itemBuilder when the item is visible. -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed.
inherited
-
reassemble(
) → void - Called whenever the application is reassembled during debugging, for example during hot reload.
-
removeItem(
int index, AnimatedListRemovedItemBuilder builder, {Duration duration = _kDuration}) → void -
Remove the item at
indexand start an animation that will be passed tobuilderwhen the item is visible. -
setState(
VoidCallback fn) → void -
Notify the framework that the internal state of this object has changed.
protected">@protectedinherited
-
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
-
toStringShort(
) → String -
A brief description of this object, usually just the runtimeType and the
hashCode.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited