TSkeleton class

A customizable skeleton loader widget that displays animated pulse/shimmer placeholders while content is loading.

TSkeleton can be used standalone to build custom loading layouts, or as a wrapper around widgets to automatically show a placeholder when loading is true.

Named Constructors

• TSkeleton.text — For simulated lines of text.
• TSkeleton.lines — For multiple simulated paragraphs of text.
• TSkeleton.circle — For circular elements like avatars or icons.
• TSkeleton.rect — For rectangular content cards or images.
• TSkeleton.card — For full card shapes with avatar and text lines.
• TSkeleton.tile — For TTile list row placeholders.
• TSkeleton.table — For multi-row, multi-column table data skeletons.

Example Usage

// 1. Standalone shapes
TSkeleton.text(width: 150)
TSkeleton.circle(size: 48)
TSkeleton.lines(count: 3)

// 2. Complex layout
TSkeleton.card()
TSkeleton.table(rows: 5, columns: 4)

// 3. Conditional wrapper
TSkeleton(
  loading: isLoading,
  child: UserProfileView(user: user),
)

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatefulWidget
• TSkeleton

Available extensions

• WidgetX

Constructors

TSkeleton({Key? key, Widget? child, bool loading = true, double? width, double? height, BorderRadius? borderRadius, BoxShape shape = BoxShape.rectangle, Color? color, Color? highlightColor, Duration duration = const Duration(milliseconds: 1500), EdgeInsetsGeometry? padding, EdgeInsetsGeometry? margin})

Creates a generic skeleton loader widget.

const

TSkeleton.circle({Key? key, double size = 40.0, Color? color, Color? highlightColor, Duration duration = const Duration(milliseconds: 1500), EdgeInsetsGeometry? padding, EdgeInsetsGeometry? margin, bool loading = true})

Creates a circular skeleton placeholder (e.g. for avatars or circular icons).

const

TSkeleton.rect({Key? key, double? width, double? height, BorderRadius? borderRadius = const BorderRadius.all(Radius.circular(8.0)), Color? color, Color? highlightColor, Duration duration = const Duration(milliseconds: 1500), EdgeInsetsGeometry? padding, EdgeInsetsGeometry? margin, bool loading = true})

Creates a rectangular skeleton placeholder.

const

TSkeleton.text({Key? key, double? width, double? height = 14.0, BorderRadius? borderRadius = const BorderRadius.all(Radius.circular(4.0)), Color? color, Color? highlightColor, Duration duration = const Duration(milliseconds: 1500), EdgeInsetsGeometry? padding, EdgeInsetsGeometry? margin, bool loading = true})

Creates a text line placeholder.

const

Properties

borderRadius → BorderRadius?

Border radius of the skeleton placeholder.

final

child → Widget?

The child widget to display when loading is false.

final

color → Color?

Custom base color for the skeleton.

final

duration → Duration

Duration of one complete pulse animation cycle.

final

hashCode → int

The hash code for this object.

no setter, inherited

height → double?

Height of the skeleton placeholder.

final

highlightColor → Color?

Custom highlight color for the shimmer animation.

final

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

loading → bool

Whether the skeleton loading animation is active.

final

margin → EdgeInsetsGeometry?

Optional margin around the skeleton.

final

padding → EdgeInsetsGeometry?

Optional padding around the skeleton.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

shape → BoxShape

Shape of the placeholder (rectangle or circle).

final

width → double?

Width of the skeleton placeholder.

final

Methods

box({double minW = 0.0, double minH = 0.0, double maxW = double.infinity, double maxH = double.infinity}) → Widget

Available on Widget, provided by the WidgetX extension

Wraps this widget in a ConstrainedBox to apply layout constraints.

center({bool when = true}) → Widget

Available on Widget, provided by the WidgetX extension

Wraps this widget in a Center widget.

createElement() → StatefulElement

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

inherited

createState() → State<TSkeleton>

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

expanded({int flex = 1}) → Widget

Available on Widget, provided by the WidgetX extension

Wraps this widget in an Expanded widget.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

padding([double left = 0.0, double top = 0.0, double right = 0.0, double bottom = 0.0]) → Widget

Available on Widget, provided by the WidgetX extension

Wraps this widget in a Padding with flexible edge control.

paddingSymmetric({double h = 0.0, double v = 0.0}) → Widget

Available on Widget, provided by the WidgetX extension

Wraps this widget in a Padding with symmetric horizontal and vertical spacing.

size({double? w, double? h}) → Widget

Available on Widget, provided by the WidgetX extension

Wraps this widget in a SizedBox to apply fixed width and/or height.

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

visible(bool visible, {bool maintainState = false}) → Widget

Available on Widget, provided by the WidgetX extension

Wraps this widget in a Visibility widget.

when(bool condition) → Widget

Available on Widget, provided by the WidgetX extension

Returns this widget if condition is true, otherwise returns SizedBox.shrink(). Usage: Text('Hello').when(isVisible)

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

card({Key? key, double? width, double? height, EdgeInsetsGeometry padding = const EdgeInsets.all(16.0), EdgeInsetsGeometry? margin = const EdgeInsets.only(bottom: 8.0), bool hasAvatar = true, double avatarSize = 40.0, int lines = 2, BorderRadius borderRadius = const BorderRadius.all(Radius.circular(10.0)), Color? color, Color? highlightColor, Duration duration = const Duration(milliseconds: 1500), bool loading = true}) → Widget

Creates a card skeleton with an optional avatar and text lines.

lines({Key? key, int count = 3, double spacing = 8.0, double lineHeight = 14.0, double lastLineWidthRatio = 0.65, BorderRadius borderRadius = const BorderRadius.all(Radius.circular(4.0)), Color? color, Color? highlightColor, Duration duration = const Duration(milliseconds: 1500), bool loading = true}) → Widget

Creates a multi-line paragraph placeholder.

table({Key? key, int rows = 5, int columns = 4, double rowHeight = 44.0, bool hasHeader = true, Color? color, Color? highlightColor, Duration duration = const Duration(milliseconds: 1500), bool loading = true}) → Widget

Creates a tabular data grid skeleton.

tile({Key? key, TSize size = TTileSize.h5, bool hasLeading = true, bool hasSubtitle = true, bool hasTrailing = false, Color? color, Color? highlightColor, Duration duration = const Duration(milliseconds: 1500), bool loading = true}) → Widget

Creates a tile skeleton conforming to TTile geometry.