input method
Creates a textfield which users can type double values into. You can use
the num?.toInt()
function to turn this into an integer
Implementation
double input({
required String label,
String? description,
double initialValue = 0,
}) {
return onKnobAdded(
DoubleInputKnob(
label: label,
initialValue: initialValue,
description: description,
),
)!;
}