CODEWITHSUNDEEP
matlabfunctioncallbackuicontrol
nsblenin
nsblenin

Reputation: 237

Cannot call callback of the pushbutton of the uicontrol in matlab

I am trying to create a button in GUI matlab and call a function when it is pressed. This code it is not working. I have also tried to use these values in the last argument of uicontrol: fnHi, 'fnHi', 'fnHi();'

The code is:

function [] = testui()
    function fnHi()
         fprintf('hi');
    end
    fnHiHandler = @fnHi;
    fnHiHandler(); fnHi();
    figure();
    uicontrol('Style', 'pushbutton', 'string', 'Hi', 'callback', fnHiHandler);
end

The output is:

testui()
hihiUndefined function or variable 'fnHiHandler'.

Error while evaluating uicontrol Callback

So the function works since it is called twice but when I press the button it crashes. I dont want to use more than one file. Thank you.

Upvotes: 1

Views: 728

Answers (1)

nsblenin
nsblenin

Reputation: 237

Ok, I found the answer. The problem is that fnHi should receive two arguments, otherwise it will crash saying that are too many input arguments. So this code works:

function [] = testui()
    function fnHi(source,eventdata)
         fprintf('hi');
    end
    fnHiHandler = @fnHi;
    fnHiHandler(); fnHi();
    figure();
    uicontrol('Style', 'pushbutton', 'string', 'Hi', 'callback', fnHiHandler);
end

Upvotes: 1

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