MATLAB: How to deploy a listbox from a pushbutton in a GUI

listboxmatlab guipushbutton

I have to deploy from a pushbutton a listbox that shows listed functions like: sen(x), tan(x), cos(x), etc. It is possible? Thanks for all your answers. Have a great day 🙂

Best Answer

listdlg('ListString',S) creates a modal dialog box which allows you to select a string or multiple strings from a list.

You can use a cell array with all the things you want in it to display more than one item (making it a list)

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MATLAB: Pushbutton

Your code:

function pushbutton1_Callback(hObject, eventdata, handles) 
% nacitanie prvku 
h=findobj(0,'Type','figure','Tag','figure1'); 
UserData=get(h,'UserData'); 
prvok=0; 
if ((str2double(get(handles.pushbutton1,'string'))) == 1) 
for i=1:UserData.pocet_vetiev; 
prvok=prvok+1; 
end 
set(handles.text1, 'String',{prvok}); 
end

is auto-generated code from GUIDE that will be run every time the button is pushed. That's what the pushbutton callback function does. As such, you don't need to attempt to check if it is pushed, which is what I think you are trying to do here:

if ((str2double(get(handles.pushbutton1,'string'))) == 1)

the solution here is a one liner (two if you count the function identifier):

function pushbutton1_Callback(hObject, eventdata, handles) 
set(h.text1,'string',num2str(str2double(get(h.text1,'string'))+1))

That's what Sean meant by use the engine part of his code.

MATLAB: Listbox and Pushbutton in GUI

You should never call one uicontrol's callback from inside another one and certainly not passing down the hObject of the first one.

Your listbox callback is actually getting called on the pushbutton object (the 'hObject' that was passed in) whose value will never change.

Why do you have a listbox callback and a button that will also trigger the same functionality? Do you want the callback to trigger when the listbox changes even if you don't press the button?

If not you should have the main piece of code in your pushbutton callback and you should refer to the listbox by its tag as:

get( handles.listbox, 'Value' )

Best Answer

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MATLAB: Pushbutton

MATLAB: Listbox and Pushbutton in GUI

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