How to identify a calling function inside a called function?

Question

Biraj Khanal 2022-3-11

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1669514-how-to-identify-a-calling-function-inside-a-called-function

回答： Walter Roberson 2023-10-20

function func3(app)
            app.ApplyButtonPushed();
            
        end
    end
    
    % Callbacks that handle component events
    methods (Access = private)
       
        % Callback function: AbsoluteEditField, ApplyButton, 
        % RelativeEditField
        function ApplyButtonPushed(app, event)
            app.EditField.Value = (event.Source.Tag) %% this does not work
            if event.source = app.EditField..... %% this works
            if event.source = app.func3..... %this does not work       
        end
        % Value changed function: EditField_2
        function EditField_2ValueChanged(app, event)
            value = app.EditField_2.Value;
            app.func3(event);
        end
    end

Here is the idea :

editing a textbox calls a function that subsequently calls another function (like a pushed button here). I am not sure how I can execute this and more importantly, how I can know from where the button pushed function was called.

For editfields, the event.Source would have the information, but when called from a function like func3, there is no such information.

How do I access the source or name of the function inside the buttonpushed function in this case??

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Walter Roberson 2022-3-11

在 MATLAB Online 中打开

app.ApplyButtonPushed();

When you do that, how is the function getting its event parameter?

Biraj Khanal 2022-3-16

编辑：Biraj Khanal 2022-3-16

在 MATLAB Online 中打开

Can be done two ways :

Inside the value change function of app.EditField , i could call

app.ApplyButtonPushed(event);

what I have done here is simply used the existing callback of the button pushed with the app.EditField which apparently sends the event as parameter.

The problem is I can't do:

function func3(app)
            app.ApplyButtonPushed(event);
            
end

Or something to that effect so that I could identify inside the ApplyButtonPushed function where it is triggered from. I want to know that func3 is where the ApplyButtonPushed is called from.

And thanks for pointing out the confusion. I did not include the previous step.

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Answer 1

aditi bagora 2023-10-20

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1669514-how-to-identify-a-calling-function-inside-a-called-function#answer_1337111

Hello Biraj,

I understand that you are looking to determine the calling function within your “ButtonPushedFcn” callback function.

To identify the source of the triggered event:

If the source function is a triggered event, you can pass ‘eventData.Source’ as a parameter to your “ButtonPushedFcn” function.
If the source does not contain event information, you can pass null as a parameter.