UnreadDivider class

WhatsApp-style "N new messages" divider rendered above the first unread message when a chat is opened with pending messages.

The divider is a snapshot of the state at chat-open time — the host wires it via MessageList.unreadBoundaryMessageId + MessageList.unreadCount. Once rendered, it stays fixed on that message until the user leaves the chat (re-entering with zero unread hides it).

Styling falls back to the ambient Theme.of(context).colorScheme so it inherits Material light/dark contrast for free. Override color / textStyle for finer control without touching ChatTheme — the divider is intentionally self-styled.

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatelessWidget
• UnreadDivider

Constructors

UnreadDivider({Key? key, required int count, ChatTheme theme = ChatTheme.defaults, Color? color, TextStyle? textStyle})

const

Properties

color → Color?

Override for the horizontal line + label background colour. Defaults to a 40% alpha version of the Material primary colour — same visual weight as WhatsApp's tinted line.

final

count → int

Number of unread messages snapshotted when the chat opened. 1 renders the singular form, >1 the plural form via the localization helper ChatUiLocalizations.newMessages.

final

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

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

textStyle → TextStyle?

Override for the label text style.

final

theme → ChatTheme

final

Methods

build(BuildContext context) → Widget

Describes the part of the user interface represented by this widget.

override

createElement() → StatelessElement

Creates a StatelessElement to manage this widget's 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, 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