TouchTargets class

Physical floor on scale imposed by fingertips rather than eyes.

Legibility is governed by visual angle and thus viewing distance; tap targets are governed by fingertip size (~7-9mm) and are distance-irrelevant. On touch displays the final scale is max(visualScale, touchScale) where touchScale guarantees that minLogicalPx logical pixels span at least minPhysicalMm millimeters.

Constructors

TouchTargets({double minPhysicalMm = 8.0, double minLogicalPx = 48.0})

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

minLogicalPx → double

The logical-pixel convention for a minimum touch target in your UI toolkit. Material uses 48.

final

minPhysicalMm → double

Minimum physical size of a touch target. ~7-9mm fits adult fingertips; 8mm is a reasonable default. (Material's 48dp at 160dpi is 7.62mm.)

final

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