I try to build my GUI using normalized units to set the position property (to avoid setting the ResizeFcn). My main concern is that there is always a label, and sometimes an editbox also next to the popup, and I need to keep them in the same line, and height, etc … , for the GUI to look OK.

Correct. Try keeping the uicontrol height at its standard value (20px) – maybe that will help findobj() to find it. You don’t care about the height value anyway because as you have seen it does not really affect the actual displayed control height.

Alright, now I see, so the basic popup menu uicontrol height is not editable.

Thanks, for the fast reply.
Sadly neither of those work, I still get an empty handle after calling findjobj.

I dont quite get your second answer, I thought the Position property sets [left bottom width height] the size of the object, but calling a simple JComboBox with javacomponent, or calling an MLComboBox with uicontrol, and then setting their position property to the exact same values, I still get 2 different height.

@Andras – perhaps the control is not yet visible by the time findjobj is called. Try calling drawnow; pause(0.05); and ensure you are not setting Visible=’off’.

Re the control height, this is how Matlab works internally; the height is automatic and cannot be controlled from Matlab. It is possible (but also not trivial) to do it in Java. You can search for this online.

I’ve run into a problem using your findjobj utility, I am trying to build a GUI with several popup menus. I build a popup menu using hComboBox=uicontrol(‘Style’,’popup’,…), but for some reason the findjobj(hComboBox) returns an empty handle. When I do the same in the command window it works perfectly (also when I call: findjobj(‘class’,’MLComboBox’). Is there a reason why is it acting like that when I call the findjobj in a function?

And secondly, why is it that when I declare the same Position property to a Matlab popup menu, and an EditBox, the height of the 2 object differ?

I am using R2014b version.

Thanks, for your reply!

@Aurélien> More updates of your blog would be welcomed 🙂

I love new features but I hate compatibility issues

Maybe 14b will be alive in a few days before MATLAB Expo 2014 (2nd October @ Paris…and I will be there even if I am from south of France!!)