ProgressRing class

A circular progress indicator that shows operation progress.

Progress rings provide visual feedback about ongoing operations in a compact, circular format. They're especially useful when horizontal space is limited or when you need a loading indicator.

The progress ring can operate in two modes:

  • Determinate - Shows specific progress from 0-100%. Use when you can measure the operation's progress.

Determinate Progress Ring

  • Indeterminate - Shows a spinning animation. Use when the operation duration is unknown.

Indeterminate Progress Ring

{@tool snippet} This example shows an indeterminate progress ring:

ProgressRing()

{@end-tool}

{@tool snippet} This example shows a determinate progress ring:

ProgressRing(value: 65)

{@end-tool}

See also:

Inheritance

Constructors

ProgressRing({Key? key, double? value, double strokeWidth = 4.5, String? semanticLabel, Color? backgroundColor, Color? activeColor, bool backwards = false})
Creates progress ring.
const

Properties

activeColor → Color?
The active color of the progress ring.
final
backgroundColor → Color?
The background color of the progress ring.
final
backwards → bool
Whether the indicator spins backwards or not. Defaults to false
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
semanticLabel → String?
Semantic label for the input.
final
strokeWidth → double
The stroke width of the progress ring.
final
value → double?
The current value of the indicator. This value must be between 0 and 100.
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<ProgressRing>
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.
override
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