How to disable an option when i choose the same option at the other me

Hi guys, i need help with something:

I'm working on GUIDE with a conversor program, that program convert any value inserted to any base (decimal, binary, etc)

My problem is the next:

When i choose an option in the first popupmenu the same option doesn't have to appear in the popupmenu 2.

How i can do that?

For example i put a numer, and i choose in what base it is (binary) and i wanna on the other popup menu this option doesn't show (binary).

Here i attached a pic:

And this is my code:

value_in_str = handles.edit1.String;
switch handles.popupmenu1.Value
    case 1
        msgbox('No ha seleccionado ninguna base a convertir');
    case 2
        value_in_dec = bin2dec(value_in_str);
    case 3
        value_in_dec = hex2dec(value_in_str);
    case 4
        value_in_dec = sscanf(value_in_str,'%lo')
    case 5
        value_in_dec = sscanf(value_in_str,'%ld');
        
end
switch handles.popupmenu2.Value
    case 1
        msgbox('No ha seleccionado ninguna base a convertir');
    case 2
        value_out_str = dec2bin(value_in_dec);
    case 3
        value_out_str = dec2hex(value_in_dec);
    case 4
        value_out_str = sprintf('%lo',value_in_dec)
    case 5
        value_out_str = sprintf('%ld',value_in_dec);
   
end
handles.edit2.String = value_out_str;

[Adam Danz]

This question was a meaningful one but now it's meaningless since you edited-away all of the information. Please revert the question back to what it was.

Original question

I'm working on GUIDE with a conversor program, that program convert any value inserted to any base (decimal, binary, etc)

My problem is the next:

When i choose an option in the first popupmenu the same option doesn't have to appear in the popupmenu 2.

How i can do that?

For example i put a numer, and i choose in what base it is (binary) and i wanna on the other popup menu this option doesn't show (binary).

Here i attached a pic:

[Walter Roberson]

Hint:

setdiff({'hello','sam','frodo'}, {'sam'})

In other words, take the overall list of options and setdiff the one the user selected in order to get the list to send to the String property of the uicontrol .

[Stefany Romero]

I've added your code and i don't know why not work Mr Roberson.

How i can add your line on my code?

This is my code:

value_in_str = handles.edit1.String;
switch handles.popupmenu1.Value
    case 1
        msgbox('No ha seleccionado ninguna base a convertir');
    case 2
        value_in_dec = bin2dec(value_in_str);
    case 3
        value_in_dec = hex2dec(value_in_str);
    case 4
        value_in_dec = sscanf(value_in_str,'%lo')
    case 5
        value_in_dec = sscanf(value_in_str,'%ld');
        
end
switch handles.popupmenu2.Value
    case 1
        msgbox('No ha seleccionado ninguna base a convertir');
    case 2
        value_out_str = dec2bin(value_in_dec);
    case 3
        value_out_str = dec2hex(value_in_dec);
    case 4
        value_out_str = sprintf('%lo',value_in_dec)
    case 5
        value_out_str = sprintf('%ld',value_in_dec);
   
end
handles.edit2.String = value_out_str;

[Walter Roberson]

popup1_choices = handles.popupmenu1.String;
source_base = popup1_choices{handles.popupmenu1.Value};
remaining_bases = setdiff(popup1_choices, {source_base});
handles.popupmenu2.String = remaining_bases;

The above would go into the Callback for handles.popupmenu1

Then when it was time to process the conversion, after the user had made a selection in popupmenu2, then

popup1_choices = handles.popupmenu1.String;
source_base = popup_choices{handles.popupmenu1.Value};

switch source_base
    case 'binary'
      value_in_dec = bin2dec(value_in_str);
    case 'hex'
      value_in_dec = hex2dec(value_in_str);
    case 'octal'
      value_in_dec = sscanf(value_in_str,'%lo');
    case 'decimal'
      value_in_dec = sscanf(value_in_str,'%ld');
end

popup2_choices = handles.popupmenu2.String;
dest_base = popup2_choices{handles.popupmenu2.Value};

switch dest_base
    case 'binary'
        value_out_str = dec2bin(value_in_dec);
    case 'hex'
        value_out_str = dec2hex(value_in_dec);
    and so on
end

[Stefany Romero]

I've tried and my program doesn't work mr Roberson. :(

This is my code actually.

popup1_choices = handles.popupmenu1.String;
source_base = popup1_choices{handles.popupmenu1.Value};
remaining_bases = setdiff(pupup_choices, {source_base});
handles.popupmenu1.String = remaining_bases;

popup1_choices = handles.popupmenu1.String;
source_base = popup1_choices{handles.popupmenu1.Value};
switch source_base
    case 1
        msgbox('No ha seleccionado ninguna base a convertir');
    case 2
        value_in_dec = bin2dec(value_in_str);
    case 3
        value_in_dec = hex2dec(value_in_str);
    case 4
        value_in_dec = sscanf(value_in_str,'%lo')
    case 5
        value_in_dec = sscanf(value_in_str,'%ld');
end
popup2_choices = handles.popupmenu2.String;
dest_base = popup2_choices{handles.popupmenu2.Value};
switch dest_base
    case 1
        msgbox('No ha seleccionado ninguna base a convertir');
    case 2
        value_out_str = dec2bin(value_in_dec);
    case 3
        value_out_str = dec2hex(value_in_dec);
    case 4
        value_out_str = sprintf('%lo',value_in_dec)
    case 5
        value_out_str = sprintf('%ld',value_in_dec);
end
handles.edit2.String = value_out_str;

[Walter Roberson]

Does

    case 'binary'
        

look like

   case 2

?

[Walter Roberson]

Which MATLAB release are you using? None of your posts seems to indicate that.

If you command

dbstop if error

and run your code, then what shows up for class(handles.popupmenu1) ?

Answer 1

[Adam Danz]

The details will vary depending on how your GUI is created (GUIDE, appdesigner, or uicontrol) but the logic will be the same. A callback function will be assigned to the first popup menu and the handles passed to that callback menu should include a master list of options for the popup menus. The callback function should achieve 4 things:

1. Identify the current selection in each menu
2. Temporarily remove the item selected in menu #1 from the master list
3. Assign the altered master list to menu #2 (missing the item selected from menu1)
4. Return the original section to menu2 if it still exists.

Here's a functional demo that creates the 2 popup menus and the callback function. You can adapt it to your needs.

% Create the GUI with 2 popup menus
% Store all handles in 'h' 
f = figure();
h.ListOptions = {'dog','cat','mouse','rat','pig'}; % Master list of options

% Create menu 1
h.list1 = uicontrol(f,'Style','popupmenu');
h.list1.Position = [20 75 60 20];
h.list1.String = h.ListOptions;

% Create menu 2
h.list2 = uicontrol(f,'Style','popupmenu');
h.list2.Position = [100 75 60 20];
h.list2.String = h.ListOptions(2:end); % Skip first option since it's selected by default

% Assign callback *after* handles are all created
h.list1.Callback = {@selectionCallbackFcn,h};
%                     include the handles ^
%    (if not using GUIDE  or appdesigner)
%
% In GUIDE, "handles" is already included, 
%    you just need to add the master list to 
%    it using guidata(). 
%    https://www.mathworks.com/help/matlab/ref/guidata.html
%
% In AppDesigner, "app" is already included,
%    you just need to use custom properties.
%    https://www.mathworks.com/help/matlab/creating_guis/share-data-across-callbacks-in-app-designer.html



function selectionCallbackFcn(hObj,~,handles)
% Popup menu callback function
% Responds to selection from popup menu #1

% Determine which string is selected in each list
selection1 = hObj.String{hObj.Value};
selection2 = handles.list2.String{handles.list2.Value};
% Remove selected string from list 2 & assign to list 2
handles.list2.String = handles.ListOptions(~strcmp(handles.ListOptions,selection1));
% Maintain the selected item in list2 unless it was just removed
handles.list2.Value = max([1;find(strcmp(handles.list2.String,selection2))]);
end

[Stefany Romero]

I've tried your code mr Adanz, but doesn't work, can you help me who i can add your code to my code please?

[Adam Danz]

The code was written & tested in r2019b but I have no reason to believe it wouldn't work in other recent releases. You can run the code in my answer to see that it works. If there's something that's not working with the code as it exists in my answer, please tell me what matlab release you're using and what the problem is.

If you're having trouble implementing that code in your GUI, that's another story.

Unfortunately you changed the question and now we cannot see the information that prompted my answer. So please edit your question back to what it was if you want additional help.

The first thing you'll need to do is to open your GUI in GUIDE (if you created the GUI in GUIDE) and add a callback function to the popup menu. Then all you need to do is add the content from my "selectionCallbackFcn" but you'll need to change the handles to your handles. Give that a try and if you get stuck, share the callback function here.

[Stefany Romero]

Mr Adanz, sorry but deleted the question for error.

I'm working on guide with MATLAB R2018A, please.

I've pasted my code, i hope you can help me.

value_in_str = handles.edit1.String;
switch handles.popupmenu1.Value
    case 1
        msgbox('No ha seleccionado ninguna base a convertir');
    case 2
        value_in_dec = bin2dec(value_in_str);
    case 3
        value_in_dec = hex2dec(value_in_str);
    case 4
        value_in_dec = sscanf(value_in_str,'%lo')
    case 5
        value_in_dec = sscanf(value_in_str,'%ld');
        
end
switch handles.popupmenu2.Value
    case 1
        msgbox('No ha seleccionado ninguna base a convertir');
    case 2
        value_out_str = dec2bin(value_in_dec);
    case 3
        value_out_str = dec2hex(value_in_dec);
    case 4
        value_out_str = sprintf('%lo',value_in_dec)
    case 5
        value_out_str = sprintf('%ld',value_in_dec);
   
end
handles.edit2.String = value_out_str;

[Adam Danz]

Thanks for reverting the question.

In the code you shared, I don't see where you've implemented the selectionCallbackFcn function. Have you added a selection callback to your popupmenu?