Converting the program to the GUI version

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Darek Myszk 2018-11-14

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https://ww2.mathworks.cn/matlabcentral/answers/429919-converting-the-program-to-the-gui-version

评论： Rik 2018-11-15

Hi. I have a problem because I've never used GUI before but now I must build GUI for my program. It consist of several stages: input datas from keyboard, generating matrices, two algoritms operating on created matrices. Now I have build something like this: Zrzut ekranu 2018-11-14 o 21.31.44.png

But, my 'code' to input dates and to making matrix is hooked to button 'Generowanie macierzy' as a function, and now when I want to make new event hook to button 'Macierz kontroli parzystosci' program can not see variable from another function.

How to make the program use data between functions?

Thanks for help

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Answer 1

Rik 2018-11-14

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https://ww2.mathworks.cn/matlabcentral/answers/429919-converting-the-program-to-the-gui-version#answer_346988

There are many ways to share data between callbacks. In the context of GUIs the most often used function is guidata.

You can also choose setappdata together with getappdata.

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Darek Myszk 2018-11-15

编辑：Darek Myszk 2018-11-15

Hi. Can you take me tip how to use this? I Have a function hooked to one button, and I want to use variable from this function when a click on another button. I don't understand how to use this :/

Rik 2018-11-15

在 MATLAB Online 中打开

You should make sure to save that variable to your handles struct (with guidata), or to save it to the appdata.

In the callback to your first button, save it:

someVariable=rand;
handles.someVariable=someVariable;
guidata(handles.f,handles)

And then you can load it in your second callback:

if hasfield(handles,'someVariable')
    someVariable=handles.someVariable;
else
    error('someVariable was not assigned, run first button first')
end