App designer drop down

I have this drop down in my app, and I want to activate the thickness box as I choose 'nofl' drop down. For example, if I choose '1' in drop down, I wish I could activate 'Structure' thickness box. If I choose '2' in drop down, I wish I could activate 'Structure' & 'Layer 1' thickness box, and not other thickness boxes.

Help me please. I don't know anything about coding.

Also, I have the Matlab script. Is there a easy way to convert this code to App designer? Thankyou.

Answer 1

[Aditya]

Hi Eun Young Park,

To activate the thickness boxes based on dropdown selection in MATLAB App Designer, use the "ValueChanged" callback of the dropdown to enable the relevant "EditField" components. Implement logic in the callback to toggle the Enable property of each thickness box.

Here's a sample code snippet for the callback:

% Callback function for DropDown
function DropDownValueChanged(app, event)
    value = app.DropDown.Value;
    
    % Reset all EditFields to be disabled initially
    app.StructureEditField.Enable = 'off';
    app.Layer1EditField.Enable = 'off';
    % Add more lines for additional layers if needed
    
    % Enable EditFields based on dropdown selection
    switch value
        case '1'
            app.StructureEditField.Enable = 'on';
        case '2'
            app.StructureEditField.Enable = 'on';
            app.Layer1EditField.Enable = 'on';
        % Add more cases for additional dropdown options if needed
    end
end

To convert your MATLAB script to App Designer, identify user input and output sections in your script, create corresponding UI components in App Designer, and move the logic into callback functions.

Refer to this documentation to read more about callbacks in app designer:

• https://www.mathworks.com/help/matlab/creating_guis/write-callbacks-for-gui-in-app-designer.html