MATLAB: How can i add a new drop down menu from an old one

drop down menuguimatlab guitext box

I am building a GUI in matlab with multiple drop down menu and text boxes what I want to do is when I choose a specific value that I defined a new drop down menu will be created or made visible

Best Answer

In the callback for the drop down menu (are you using what the Mathworks badly calls a "popup"?), call uicontrol to create new menu items or controls, or call set() to turn the 'Visible' property of the control to 'on' or 'off'

set(handles.pushbutton1, 'Visible', 'off'); % Hide push button

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MATLAB: Drop Down and geoshow

I am not seeing the issue with your code, but it could be improved a bit. Your initial value on the dropdown is the first one - 'Harta1', and if you opened the dropdown menu and pressed it again callback won't be executed, but that's not an issue because you have already loaded Harta1 in the startupFcn.

Better way to do it is by having an intial option that tells you to choose the map, as a result, you don't have to have the startupFcn anymore.

% Value changed function: SelecteazaHartaDropDown
function SelecteazaHartaDropDownValueChanged(app, event)
     value = app.SelecteazaHartaDropDown.Value;
     switch value
         case 'Please select the map'
             cla(app.UIAxes)
         case 'Harta1'
             s=shaperead('C:\Users\Vostro\Desktop\App_Maps\Map1\map1.shp');
             geoshow(app.UIAxes,s);
         case 'Harta2'
             s=shaperead('C:\Users\Vostro\Desktop\App_Maps\Map2\map2.shp');
             geoshow(app.UIAxes,s);
     end
end

MATLAB: Drop down, App Designer

app.Lista_anni.Value return a char, you need to modify the comparison like this

if ( value=='1' )
plot(app.UIAxes2,1:3,5:7,'r')
else ( value=='2' )
plot(app.UIAxes2,1:3,5:7,'b')
end

Best Answer

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MATLAB: Drop Down and geoshow

MATLAB: Drop down, App Designer

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