How to code dependent popup menus in Guide GUI

I am trying to make a GUI that calculates certain values and characteristics for solenoids.

I want to have a popup menu that the user can choose between either single, heavy, or triple film enameled magnet wire.

I would like a second, dependent popup menu, to display the same list of gauge wire (15-30) with different variables associated to each choice. For example, the 20 gauge wire would have a different diameter in all three cases because of the enamels thickness.

How can I go about making the second popup menu dependent on the choice of popup menu 1?

Another way to describe it is to say:

     Popup Menu 1: Choose A, B, or C

     Popup Menu 2: Displays either [A1, A2], [B1, B2], or [C1, C2] as choices

I already have a working GUI that handles heavy film enameled wire that uses the following code:

 function popupmenu1_Callback(hObject, eventdata, handles)
 % hObject    handle to popupmenu1 (see GCBO)
 % eventdata  reserved - to be defined in a future version of MATLAB
 % handles    structure with handles and user data (see GUIDATA)

 % Determine wire gauge selection
 str = get(hObject, 'String');
 val = get(hObject, 'Value');
 % Set current data to the selected data set
 switch str{val}
     case '20 ga - AWG Enameled Magnet Wire' % User selects 20 ga wire
         handles.wg_input = .0173;   % Wire radius
         handles.tpi = 28.90;        % Turns per inch
         handles.rpi = .000844;      % Resistance per inch
     case '21 ga - AWG Enameled Magnet Wire' % User selects 21 ga wire
         handles.wg_input = .0155;   % Wire radius
         handles.tpi = 32.26;        % Turns per inch
         handles.rpi = .001064;      % Resistance per inch
     .
     .
     .

     case '30 ga - AWG Enameled Magnet Wire' % User selects 30 ga wire
         handles.wg_input = .0058;   % Wire radius
         handles.tpi = 28.90;        % Turns per inch
         handles.rpi = .008643;      % Resistance per inch
 end
 % Save the handles structure
 guidata(hObject,handles)

I need to essentially make three lists like this corresponding to different wire radii, turns per inch, and resistance per inch that is dependent upon the first choice in popup 1.

This may be confusing, and I know I've repeated myself many times, so please let me know if you have any questions and I thank y'all in advance for any help.

[Elena Vollmer]

Hello! I need the same thing for a code that I'm writing. I know you asked your question a while back but did you maybe find a solution to the problem? I'd be very interested... Thanks in advance!

[Jan]

@Elena: I was not able to understand the question, when I read it in 2013. When should what appear where? What does the shown code demonstrate? I assume, the callback of the popup menu 1 can simply set the required strings in the popup menu 2, so perhaps the solution is easy - but I'm not sure what should happen where.

Now you state, that you need "the same thing". Well. I recommend to open your own thread and ask for your specific problem. If you explain clearly, what should happen where, there will be an easy solution.

[Elena Vollmer]

The GUI I'm creating has changed, so I don't actually need the exact same thing anymore. I contacted the Mathworks Support team to ask how to solve my new and this older problem and got a reply. In my case I want a popup menu to allow the user the choice between 3 models. Depending on what the user chooses the edit boxes further down should change. The reason being that my first two models require 5 user inputs while the third needs 7.

The question asked here is similar except that Addison wanted a second popup menu to display different choices depending on what choice the user had made in the first popup menu. Let's say the choices in popup menu 1 are "A", "B" and "C". Now if the user picks "A", popup menu 2 should allow only the choice between "I" and "II". If "B" is selected, the user can only choose either "III" or "IV", etc.

Below are the solutions suggested by the Mathworks Support Team to both Addison's and my problem.

1. Addison's Problem:

"Menu one is a listbox depending on the selected value in the listbox, adjust the content in the menu two, e.g."

function mwtest
 a = uicontrol('style','listbox','String',{'A','B','C'},'Position',[20 20 100 200],'Callback',@myfun);
 c = uicontrol('style','listbox','String',{'I','II'},'Position',[200 100 100 200]);

 function myfun(~,~)
     switch a.Value
         case 1
             c.String = {'I','II'};
         case 2
             c.String = {'III','IV'};
         case 3
             c.String = {'I','II','III','IV'};
    end
 end
 end

2. My problem:

"Select the model, if it is model 1 or 2 display 5 text boxes if its model 3 display two additional text boxes. In your UI just always use 7 and toggle the visibility of 2 depending on the chosen model. I think the easiest is to use a listbox with the model options, e.g."

function mwtest
 a = uicontrol('style','listbox','String',{'Model1','Model2','Model3'},'Position',[20 20 100 200],'Callback',@myfun);
 uicontrol('style','edit','Position',[200 200 80 80]);
 c = uicontrol('style','edit','Position',[200 300 80 80],'Visible','off');

 function myfun(~,~)
     if (a.Value == 3)
         c.Visible = 'on';
     else
         c.Visible = 'off';
     end
 end
 end

I hope this clarifies everything.

[Jan]

@Elena: Please do not hijack a foreign thread. You cannot accept an answer here, if it solves your problem. And if anybody posts an answer, it is not clear if it belongs to the original question or to your problem. So, please, open a new thread. Thanks.

Answer 1

[Rik]

Use code like this in the callback of the first popup menu:

popup2_database={{A1, A2},{B1, B2},{C1, C2}};
val=get(hObject,'Value');
set(handles.popup2,'String',popup2_database{val});

The third input of the set function needs to be a cell containing strings.