Yes this is possible. You can create a listbox, and a label, and assign a callback to the listbox that sets the label.
In general, to make components in apps do things when you interact with them, you assing a function to a property that ends in Fcn. These can point to functions you define in your m-code, or for simple things you can just define them inline as I did below.
Here's a demo of a programmatically generated app:
u = uifigure;
lst = uilistbox(u,'Items',["Red" "Green" "Blue" "Purple"]);
lbl = uilabel(u,'Text','Red');
lbl.Position([1 3])=[300 100];
lst.ValueChangedFcn = @(~,~)set(lbl,'Text',lst.Value);
If you use App Designer (click Apps at top, then 'Design App') the process looks like this:
- Drag ListBox and Label into your app
- Click 'Code View' at the top right
- Click the + button in the Callbacks section of the Code Browser at left
- An Add Callback Function dialog will pop up, you can select your ListBox component which only has one available callback (ValueChangedFcn) and hit Add callback
- MATLAB will generate a function for you with value holding the selected item. Just add another line to set the Text property of the label: app.Label.Text = value;
