SubSubscriber<T> class
Subscribes to a Stream.
Allows attaching a callback that is called whenever the stream emits. Does not rebuild its child widget.
Example usage looks like this:
return SubListener(
stream: myStream,
listener: (event) => print('$event has been emitted!'),
child: /* ... */,
);
The subscription is automatically closed.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- SubValue<
StreamSubscription< T> ?> - SubSubscriber
Constructors
-
SubSubscriber({required Widget child, required Stream<
T> stream, ValueChanged<T> ? listener}) - Subscribes to a Stream.
Properties
-
builder
→ SubValueBuild<
StreamSubscription< T> ?> -
Creates the child of this Widget with the value.
finalinherited
-
create
→ SubValueBuilderCreate<
StreamSubscription< T> ?> -
Creates the value. Called at least once and everytime keys changes.
finalinherited
-
dispose
→ SubValueBuilderDispose<
StreamSubscription< ?T> ?> -
Disposes the value. Called before recreation and when disposing. Useful for Listeners, etc.
finalinherited
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- keys → SubValueBuilderKeys?
-
Used to decide when to recreate the value. If null, the value is never recreated.
finalinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
update
→ SubValueBuilderUpdate<
StreamSubscription< ?T> ?> -
Updates the value. Called every build. If null, does nothing.
In the call order, this comes after recreating the value.
finalinherited
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< SubValue< StreamSubscription< >T> ?> -
Creates the mutable state for this widget at a given location in the tree.
inherited
-
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