Listbox content from structure hierarchy (GUIDE)

I have a listbox in which one I would like to set as content the subfield names of a structure.

Example: 'Database' is the structure which have inside the fieldnames Car, Bus and Motorbike. These fieldnames are 1x1 struct (e.g Database.Car) and are used as subfields.

Then I want to create a listbox which contains the subfields and mantain this listbox updated since different subfields will be added.

Thanks in advance,

Answer 1

[Jan]

Here "Car" etc are the "fields", not the "subfields" (which would mean something like: DataBase.Vehicle.Car).

DataBase.Car = 1;
DataBase.Bus = 2;
DataBase.Motorbike = 3;

List = fieldnames(DataBase);
uicontrol('Style', 'listbox', 'String', List);

Keeping the listbox "updated" when the struct is changed, is very complicated. You need an object oriented approach to start a callback, when the data are changed. But you can fake it by not adding further fields manually, but when you use a dedicated function for this:

function S = myAddField(S, Field, Data)
S.(Field) = Data;
updateGui(S);   % <-- Implementation depends on your GUI

[Andrew Reibold]

I'm not sure what in St. Rita's House of Pancakes you are doing with your face, but it is distracting me from reading and focusing on your answer :)

[Manuel]

@Jan, Hello Jan, I have still some problems with the listbox probably I misunderstund some concepts. As you told me before to show the fieldnames in the listbox content we need the next code:

List = fieldnames(DataBase);
uicontrol('Style', 'listbox', 'String', List);

but the 'uicontrol' command above should be located on the listbox_CreateFcn function? :

function listbox_CreateFcn(hObject, eventdata, handles)

or it is an independent way to set the listbox content? Because I tried in the listbox_CreateFcn and does not work.

Thank you for your time,

Regards

[Manuel]

Problem solve, can be done inside the 'CreateFcn(hObject, eventdata, handles)' function as:

List = fieldnames(Database);
set(hObject,'String',List);