ExpandingArcTwoColorsLoader class

ExpandingArcTwoColorsLoader is a custom loader widget that displays two expanding arcs with different colors. The arcs gradually expand and contract in a smooth, continuous animation loop, while the loader itself rotates around its center, creating a dynamic visual effect.

Parameters:

  • size: The size (width and height) of the loader widget. Must be greater than 0.
  • strokeWidth: The thickness of the arcs' strokes. Must be greater than 0 and less than size / 3.
  • color1: The color of the first arc. Default is Colors.blue.
  • color2: The color of the second arc. Default is Colors.red.
  • rotationDurationMs: Duration (in milliseconds) for a full rotation. Must be at least 500 ms. Default is 1000 ms.
  • expansionDurationMs: Duration (in milliseconds) for the arcs to expand and contract. Must be at least 1000 ms. Default is 2000 ms.

Example Usage:

ExpandingArcTwoColorsLoader(
  size: 48.0,
  strokeWidth: 5.0,
  color1: Colors.blue,
  color2: Colors.red,
  rotationDurationMs: 1000,
  expansionDurationMs: 2000,
)

Assertions:

  • size: Must be greater than 0.
  • strokeWidth: Must be greater than 0 and less than size / 3.
  • rotationDurationMs: Must be at least 500 milliseconds.
  • expansionDurationMs: Must be at least 1000 milliseconds.
Inheritance

Constructors

ExpandingArcTwoColorsLoader.new({Key? key, double size = 48.0, double strokeWidth = 5.0, Color color1 = Colors.blue, Color color2 = Colors.red, int rotationDurationMs = 1000, int expansionDurationMs = 2000})
const

Properties

color1 → Color
final
color2 → Color
final
expansionDurationMs → int
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
rotationDurationMs → int
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
size → double
final
strokeWidth → double
final

Methods

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