Range Slider bug when moving sliders

Hi all,

I'm trying to use the Range Slider in app designer:

fig = uifigure;
sld = uislider(fig,"range");

But even the above minimalistic example results in the following error as soon as I drag one of the sliders:

Error in executing callback registered with ViewModel:

No public property 'PrivateValue' for class 'RangeSlider'.

I'm using a MacBookPro M2 and 23.2.0.2320655 (R2023b) Prerelease Update 3 and wondering if the problem is Apple silicon specific or if this is a general problem. Either way, I would much appreciate any inputs on how to solve this.

Answer 1

[Jan Zbinden]

Found the answer to my problem when digging in the code of the app designer components. The property access of the LimitedRangeValueComponent class (found in the folder toolbox/matlab/uicomponents/uicomponents/+matlab/+ui/+control/+internal/+model/+mixin) might be buggy.

The current code of LimitedRangeValueComponent is:

    properties(Access = {?matlab.ui.control.internal.model.LimitedValueComponent, ...
           ?appdesservices.internal.interfaces.controller.AbstractController})

        % Internal properties
        %
        % These exist to provide:
        % - fine grained control to each properties
        % - circumvent the setter, because sometimes multiple properties
        %   need to be set at once, and the object will be in an
        %   inconsistent state between properties being set

        PrivateValue = [0 100];
    end

Changing it to the following fixes the problem

     properties(Access = public)
        % Internal properties
        %
        % These exist to provide:
        % - fine grained control to each properties
        % - circumvent the setter, because sometimes multiple properties
        %   need to be set at once, and the object will be in an
        %   inconsistent state between properties being set

        PrivateValue = [0 100];
    end

Not an elegant solution, but it works.