ShapeAdjustment class final

An on-canvas handle bound to the numeric value field, such as an arrow's shaft thickness: dragging it sets the value within the field's bounds. Right/up increase; left/down decrease.

Positions and directions are in unit coordinates of the shape frame and read the shape's current values.

Constructors

ShapeAdjustment({required String field, required String label, double step = .01, double pixelsPerStep = 4, ShapeAdjustmentHandle handle = ShapeAdjustmentHandle.diamond, DiagramPoint? position(Map<String, Object?> values)?, DiagramPoint? direction(Map<String, Object?> values)?, double? drag(Map<String, Object?> values, DiagramPoint delta, double previousValue)?, Iterable<double> snapStops(Map<String, Object?> values, {required bool shiftPressed})?})

const

Properties

direction → DiagramPoint? Function(Map<String, Object?> values)?

The shape-local direction that increases the value; null scrubs right/up.

final

drag → double? Function(Map<String, Object?> values, DiagramPoint delta, double previousValue)?

The value for a unit-coordinate pointer delta, or null to scrub.

final

field → String

The NumberValueField this handle sets; its minimum, maximum and integer constraint bound the handle.

final

handle → ShapeAdjustmentHandle

final

hashCode → int

The hash code for this object.

no setter, inherited

label → String

final

pixelsPerStep → double

final

position → DiagramPoint? Function(Map<String, Object?> values)?

Where the handle sits on the geometry; null places it on the frame's top edge.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

snapStops → Iterable<double> Function(Map<String, Object?> values, {required bool shiftPressed})?

Meaningful values for magnetic snapping, or strict snapping with Shift.

final

step → double

final

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