UniversalCircularProgressIndicator class

A Material Design circular progress indicator, which spins to indicate that the application is busy.

A widget that shows progress along a circle. There are two kinds of circular progress indicators:

Determinate. Determinate progress indicators have a specific value at each point in time, and the value should increase monotonically from 0.0 to 1.0, at which time the indicator is complete. To create a determinate progress indicator, use a non-null value between 0.0 and 1.0.
Indeterminate. Indeterminate progress indicators do not have a specific value at each point in time and instead indicate that progress is being made without indicating how much progress remains. To create an indeterminate progress indicator, use a null value.

The indicator arc is displayed with valueColor, an animated value. To specify a constant color use: AlwaysStoppedAnimation<Color>(color).

{@tool dartpad} This example showcases determinate and indeterminate CircularProgressIndicators. The CircularProgressIndicators will use the updated Material 3 Design appearance

** See code in examples/api/lib/material/progress_indicator/circular_progress_indicator.0.dart ** {@end-tool}

{@tool dartpad} This sample shows the creation of a CircularProgressIndicator with a changing value. When toggling the switch, CircularProgressIndicator uses a determinate value. As described in: https://m3.material.io/components/progress-indicators/overview

** See code in examples/api/lib/material/progress_indicator/circular_progress_indicator.1.dart ** {@end-tool}

Constructors

UniversalCircularProgressIndicator({Key? key, double? value, Color? backgroundColor, Color? color, Animation<Color?>? valueColor, double? strokeWidth, double? strokeAlign, String? semanticsLabel, String? semanticsValue, StrokeCap? strokeCap, BoxConstraints? constraints, double? trackGap, EdgeInsetsGeometry? padding}): A Material Design circular progress indicator, which spins to indicate that the application is busy.
const
UniversalCircularProgressIndicator.adaptive({Key? key, double? value, Color? backgroundColor, Animation<Color?>? valueColor, double? strokeWidth = 4.0, String? semanticsLabel, String? semanticsValue, StrokeCap? strokeCap, double? strokeAlign, BoxConstraints? constraints, double? trackGap, EdgeInsetsGeometry? padding}): Creates an adaptive progress indicator that is a CupertinoActivityIndicator on TargetPlatform.iOS & TargetPlatform.macOS and a CircularProgressIndicator in material theme/non-Apple platforms.
const

Properties

backgroundColor → Color?: Color of the circular track being filled by the circular indicator.
no setterinherited
color → Color?: The progress indicator's color.
finalinherited
constraints → BoxConstraints?: Defines minimum and maximum sizes for a CircularProgressIndicator.
finalinherited
controller → AnimationController?: An optional AnimationController that controls the animation of this indeterminate progress indicator.
finalinherited
hashCode → int: The hash code for this object.
no setterinherited
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
padding → EdgeInsetsGeometry?: The padding around the indicator track.
finalinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
semanticsLabel → String?: The SemanticsProperties.label for this progress indicator.
finalinherited
semanticsValue → String?: The SemanticsProperties.value for this progress indicator.
finalinherited
strokeAlign → double?: The relative position of the stroke on a CircularProgressIndicator.
finalinherited
strokeCap → StrokeCap?: The progress indicator's line ending.
finalinherited
strokeWidth → double?: The width of the line used to draw the circle.
finalinherited
trackGap → double?: The gap between the active indicator and the background track.
finalinherited
value → double?: If non-null, the value of this progress indicator.
no setteroverride
valueColor → Animation<Color?>?: The progress indicator's color as an animated value.
finalinherited
year2023 → bool?: When true, the CircularProgressIndicator will use the 2023 Material Design 3 appearance.
finalinherited

Methods

createElement() → StatefulElement: Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<CircularProgressIndicator>: Creates the mutable state for this widget at a given 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

UniversalCircularProgressIndicator class

Constructors

Properties

Methods

Operators

masamune_universal_ui library