StreamSnackbarHost class

An inline render slot for snackbars from a StreamSnackbarMessenger.

A leaf widget that renders the currently-active snackbar at its own location. The consumer is responsible for placing it via standard layout (Stack / Positioned / etc.).

For snackbars that should appear above a small surface (composer, attachment picker), use StreamSnackbarPopup instead — it renders into the surrounding Overlay so the snackbar escapes the anchor's bounds.

{@tool snippet}

Place the host at the bottom of a screen-level surface:

Scaffold(
  body: Stack(
    children: [
      const ChannelBody(),
      Positioned(
        bottom: 0, left: 0, right: 0,
        child: SafeArea(child: StreamSnackbarHost(messenger: _state)),
      ),
    ],
  ),
)

{@end-tool}

See also:

• StreamSnackbarPopup, the anchored variant for small surfaces.
• StreamSnackbarScope, which bundles state, host, and lookup.

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatefulWidget
• StreamSnackbarHost

Constructors

StreamSnackbarHost({Key? key, required StreamSnackbarMessenger messenger})

Creates a snackbar host that renders snackbars from messenger.

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

messenger → StreamSnackbarMessenger

The state holder providing snackbar data.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

createElement() → StatefulElement

Creates a StatefulElement to manage this widget's location in the tree.

inherited

createState() → State<StreamSnackbarHost>

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