Feature request: API to disable/enable a control

[jwdunn1]

Use case: In this sketch, the Y and Z sliders are initially independent. The toggle option allows the user to lock Y to Z. When toggled, the present ratio of Y to Z is computed and then, as the Z slider is dragged, the Y slider automatically remains in correspondence.
Problem: All works well when the Z slider is moved, but if the user attempts to move the Y slider, erratic behavior occurs and ultimately resets.
Solution: The ideal behavior would be to allow the sketch creator to programmatically disable/enable the Y slider in accord with the toggle, like this sketch. Disable means the control is still visible, but not adjustable by the user. Perhaps the blue color in the UI changes to gray. The corresponding numeric value should remain visible.
Question: Is there an alternative approach to this use case?

[msawired]

That's a fair use case, thank you for the detailed explanation. I will look into adding disable/enable functionality to the library.