ColourPickerGestureUtils class

Shared geometry and coordinate utilities for colour picker gesture handling.

Provides two core transformations used by all picker gesture detectors:

1. Global → normalised — Converts a screen-space tap/drag position into a (0-1, 0-1) coordinate within the picker widget.
2. Normalised → polar — Converts the normalised position into hue (degrees) and distance (0-1 from centre), used by wheel and ring pickers.

Constructors

ColourPickerGestureUtils()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

globalToLocalNormalized(Offset globalPosition, BuildContext context, double width, double height) → Offset?

Converts a global position to local normalized coordinates 0-1

toPolarCoordinates(Offset normalizedPosition, double width, double height) → ({double distance, double hue})

Converts a normalized position to polar coordinates for wheel/ring pickers