EmptyState class
A configurable empty-state widget for screens with no content.
Renders an icon (or custom illustration), an optional title, a message, and an optional action button in a vertically centred layout.
EmptyState(
message: 'You\'re all caught up.',
title: 'No messages',
icon: Icons.inbox_outlined,
)
// Pre-built variants
EmptyState.noResults(onClear: clearFilters)
EmptyState.noConnection(onRetry: reload)
EmptyState.error(onRetry: reload)
EmptyState.noData(onCreate: openForm)
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatelessWidget
- EmptyState
Constructors
- EmptyState({required String message, String? title, IconData? icon, Widget? illustration, String? actionLabel, VoidCallback? onAction, Key? key})
-
Creates a fully customisable empty-state widget.
const
- EmptyState.error({Key? key, VoidCallback? onRetry, String? message})
-
Shows an empty state for unexpected errors.
factory
- EmptyState.noConnection({Key? key, VoidCallback? onRetry})
-
Shows an empty state for when the device is offline.
factory
- EmptyState.noData({Key? key, String? message, VoidCallback? onCreate})
-
Shows an empty state for screens with no data yet.
factory
- EmptyState.noResults({Key? key, VoidCallback? onClear})
-
Shows an empty state for empty search or filter results.
factory
Properties
- actionLabel → String?
-
Label for the optional action button.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- icon → IconData?
-
Icon displayed when illustration is not provided.
final
- illustration → Widget?
-
A custom illustration widget. Takes precedence over icon.
final
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- message → String
-
The main descriptive message shown to the user.
final
- onAction → VoidCallback?
-
Callback invoked when the action button is pressed.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- title → String?
-
Optional bold title displayed above message.
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