MATLAB: Returning a value from a function after click in figure

figurefunctionselectiontype

I would like to return a value from a function, based on the type of click that was used.
I have the following codes:
figure
i = 0;
plot(rand(5))
val = set(gca,'buttondownfcn',@mybttnfcn)
and
 function value =  mybttnfcn(h,~)
    hf = get(h,'parent');
    b = get(hf,'selectiontype');
    if strcmpi(b,'normal')
        value = 1;
        disp(value)
    elseif strcmpi(b,'alt')
        value = -1;
        disp(value)
    else
        value = 0;
        disp(value)
 end
I would want to capture the 'value' from the function, into a variable where the call happens. Thanks!

Best Answer

Callbacks cannot return values (except for position constraints functions). You need to get the value out a different way.
https://www.mathworks.com/help/matlab/creating_guis/share-data-among-callbacks.html
Related Question