@SylvanoMTL – try to set the uifigure’s position to (-1000,-1000,100,100) – this will hide the figure, although the user will still see something in the Desktop taskbar.

I apologize, I intended my response to fall under ‘T’ but did not seem to work.

I was referring to the bit of code posted by ‘T’ regarding the toolgroup and appcontainer. If I run that snippet of code they posted in R2019b, the figure generated is all wrong, but works fine in R2020b. I have the deep learning toolbox and their Deep Network Designer tool (which looks fine in R2019b and R2020b) very much appears to be built on an AppContainer type framework , however when drilling through the source code there’s not much to go on, and it’s not even like they p-coded or encrypted it. It seems like maybe it’s javascript based, but even searching through that bit of code I can’t find terms that match buttons in the TabGroup. I was more or less just looking for examples on how to build out the appcontainer into a more formidable GUI, was at least able to figure out how to add Figures to panels and tabbed figures, probably sufficient for moving forward. R2019b would be a nice to have but maybe too much of a leap in versions for these features.

It is not clear from your comment which code exactly you are referring to and what you see differently in 19b vs. 20b, so I cannot assist with your specific query.
In general I can say that it is not surprising that undocumented things that work in one Matlab release don’t work exactly the same way on a different release.

Any ideas on why this bit of code looks fine in say R2020b but produces an incorrect image in R2019b? I’m not seeing any error printouts that suggest it’s unhappy with the inputs.

Mathworks has indeed been migrating its Java-based apps (like the PIDtuner, as you mentioned) to html-based ones (uifigures) so that they can be used in Matlab online. If you drill a bit into the code of any of these apps you will find that they are using an AppContainer object which already has a toolstrip (empty) attached. Toolstrip elements have the same syntax as the ones used in Java apps:

% Create the app
app = matlab.ui.container.internal.AppContainer();

% Create a tabgroup with a tab
tabGroup = matlab.ui.internal.toolstrip.TabGroup();
tab = matlab.ui.internal.toolstrip.Tab();
tabGroup.Tag = 'myTabGroup';
tab.Tag = 'myTab';
tab.Title = 'Tab#1';

% Add tab to group and group to app
tabGroup.add(tab);
app.addTabGroup(tabGroup);

% Make app visible
app.Visible = true;

I’d 100% recommend you to work with this AppContainer, since it offers more possibilities than the normal Java-based one. Besides the toolstrip (same syntax as for Java, so Yairs 9 posts on it should still be relevant), you can insert uifigures as draggable panels to the left/right/bottom of the app (way better than the java-based DataBrowser) and control the layout of the app grid. Plus, you can use custom html/javascript objects (using the uihtml component) inside the app which in my view are easier to code and customize.

Only downside is that everything is undocumented and you’d need to investigate a lot on the AppContainer API. I have already looked my fair bit into it, so I could probably help

@Paul – There must be a way to use a toolstrip in uifigures, because many Matlab apps use uifigures with a toolstrip. But I have not [yet] discovered how to add a toolstrip to uifigures – only to Java-based windows (tool-group and regular figures).

thanks