WheelPicker class

A circular colour wheel picker with value/alpha sliders.

The wheel maps the full hue spectrum around its circumference and saturation from the centre outward. A draggable pointer lets the user pick any hue/saturation combination, while separate sliders control brightness (value) and opacity (alpha).

Supports both portrait (vertical) and landscape (horizontal) layouts, controlled by orientation. In portrait mode the wheel sits above the sliders; in landscape mode they sit side by side.

This widget is not typically created directly — use ColourPicker.wheel instead.

Inheritance
Available extensions

Constructors

WheelPicker({Key? key, required Colour currentColour, required ValueChanged<Colour> onColourChanged, required double size, required PickerStyle style, required bool showLabel, required bool displayThumbColor, required Orientation orientation, HSVColour? pickerHsvColour, ValueChanged<HSVColour>? onHsvColourChanged, List<Colour>? colourHistory, ValueChanged<List<Colour>>? onHistoryChanged})
const

Properties

colourHistory → List<Colour>?
final
currentColour → Colour
final
displayThumbColor → bool
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
makeRefreshable → Widget

Available on Widget?, provided by the WidgetExtension extension

Make your any widget refreshable with RefreshIndicator on top
no setter
onColourChanged → ValueChanged<Colour>
final
onHistoryChanged → ValueChanged<List<Colour>>?
final
onHsvColourChanged → ValueChanged<HSVColour>?
final
orientation → Orientation
final
pickerHsvColour → HSVColour?
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
showLabel → bool
final
size → double
final
style → PickerStyle
final

Methods

center({double? heightFactor, double? widthFactor}) → Widget

Available on Widget?, provided by the WidgetExtension extension

set parent widget in center
cornerRadiusWithClipRRect(double radius) → ClipRRect

Available on Widget?, provided by the WidgetExtension extension

add corner radius
cornerRadiusWithClipRRectOnly({int bottomLeft = 0, int bottomRight = 0, int topLeft = 0, int topRight = 0}) → ClipRRect

Available on Widget?, provided by the WidgetExtension extension

add custom corner radius each side
createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<WheelPicker>
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
expand({int flex = 1}) → Widget

Available on Widget?, provided by the WidgetExtension extension

add Expanded to parent widget
fit({BoxFit? fit, AlignmentGeometry? alignment}) → Widget

Available on Widget?, provided by the WidgetExtension extension

add FittedBox to parent widget
flexible({int flex = 1, FlexFit? fit}) → Widget

Available on Widget?, provided by the WidgetExtension extension

add Flexible to parent widget
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
opacity({required double opacity, int durationInSecond = 1, Duration? duration}) → Widget

Available on Widget?, provided by the WidgetExtension extension

add opacity to parent widget
paddingAll(double padding) → Padding

Available on Widget?, provided by the WidgetExtension extension

return padding all
paddingBottom(double bottom) → Padding

Available on Widget?, provided by the WidgetExtension extension

return padding bottom
paddingDirectional({double start = 0.0, double top = 0.0, double end = 0.0, double bottom = 0.0}) → Widget

Available on Widget?, provided by the WidgetExtension extension

paddingLeft(double left) → Padding

Available on Widget?, provided by the WidgetExtension extension

return padding left
paddingOnly({double top = 0.0, double left = 0.0, double bottom = 0.0, double right = 0.0}) → Padding

Available on Widget?, provided by the WidgetExtension extension

return custom padding from each side
paddingRight(double right) → Padding

Available on Widget?, provided by the WidgetExtension extension

return padding right
paddingSymmetric({double vertical = 0.0, double horizontal = 0.0}) → Padding

Available on Widget?, provided by the WidgetExtension extension

return padding symmetric
paddingTop(double top) → Padding

Available on Widget?, provided by the WidgetExtension extension

return padding top
rotate({required double angle, bool transformHitTests = true, Offset? origin}) → Widget

Available on Widget?, provided by the WidgetExtension extension

add rotation to parent widget
scale({required double scale, Offset? origin, AlignmentGeometry? alignment, bool transformHitTests = true}) → Widget

Available on Widget?, provided by the WidgetExtension extension

add scaling to parent widget
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
tooltip({required String msg}) → Widget

Available on Widget?, provided by the WidgetExtension extension

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
translate({required Offset offset, bool transformHitTests = true, Key? key}) → Widget

Available on Widget?, provided by the WidgetExtension extension

add translate to parent widget
validate({Widget value = const SizedBox()}) → Widget

Available on Widget?, provided by the WidgetExtension extension

Validate given widget is not null and returns given value if null.
visible(bool visible, {Widget? defaultWidget}) → Widget

Available on Widget?, provided by the WidgetExtension extension

set visibility
withHeight(double height) → SizedBox

Available on Widget?, provided by the WidgetExtension extension

With custom height
withShaderMask(List<Color> colors, {BlendMode blendMode = BlendMode.srcATop}) → Widget

Available on Widget?, provided by the WidgetExtension extension

Wrap with ShaderMask widget
withShaderMaskGradient(Gradient gradient, {BlendMode blendMode = BlendMode.srcATop}) → Widget

Available on Widget?, provided by the WidgetExtension extension

Wrap with ShaderMask widget Gradient
withSize({double width = 0.0, double height = 0.0}) → SizedBox

Available on Widget?, provided by the WidgetExtension extension

With custom height and width
withTooltip({required String msg}) → Widget

Available on Widget?, provided by the WidgetExtension extension

Validate given widget is not null and returns given value if null.
withVisibility(bool visible, {Widget? replacement, bool maintainAnimation = false, bool maintainState = false, bool maintainSize = false, bool maintainSemantics = false, bool maintainInteractivity = false}) → Visibility

Available on Widget?, provided by the WidgetExtension extension

set widget visibility
withWidth(double width) → SizedBox

Available on Widget?, provided by the WidgetExtension extension

With custom width

Operators

operator ==(Object other) → bool
The equality operator.
inherited