How do I pass variables from one GUI to another

57 visualizaciones (últimos 30 días)
Gerrit el 7 de Nov. de 2013
I'm still struggling passing variables from one GUI to another by using handles.
I have created a GUI called "main" including a push button "OK" and an edit text box "a". Using "OK" will open a secong GUI "main2" which is supposed to return a variable "e".
function OK_Callback(hObject, eventdata, handles)
uiwait(main2); %Open main2
e = handles.e;
In "main2" I have a variable "e" being calculated in a function "calculate" which is being called after typing a number into the edit text box taged "d". By debugging I found out that "Calculate" returns the correct value. All cool so far.
function e = calculate(c,d)
e = c + d;
function d_Callback(hObject, eventdata, handles)
c = str2double(get(handles.c,'string'));
d = str2double(get(handles.d,'string'));
handles.e = e; % All cool until here!
guidata(hObject,handles); % Update handles structure
uiresume; % back to main
What I'm struggling with is: How do I get "e" (or its handle) from "main2" into "main"? Also set(handles.e,'string',e) is not working.
Anybody knows what's going on here?
Thank heaps for any help!
  1 comentario
Robert el 10 de Mayo de 2017
Can you put some pictures with this app, please? Thank you!

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Respuesta aceptada

Jonathan LeSage
Jonathan LeSage el 7 de Nov. de 2013
You can use the setappdata and getappdata functions to pass values between UIs that you've developed. Since you're passing values between UIs, you want to store the values in the root so all other UIs can access them.
For example, after computing "e" in your main2 UI, you can store the value to the root:
By specifying a UI object handle of "0", we are telling MATLAB to store this value in the root directory. To access this value in your other UI, simple use the getappdata function:
e = getappdata(0,'evalue');
Hope this help to get you started!
  9 comentarios
Jingyang Xie
Jingyang Xie el 28 de Feb. de 2021
Thank you Jonathan!
Joan Sebastián Estrada Ramos
Joan Sebastián Estrada Ramos el 23 de Mayo de 2021

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Image Analyst
Image Analyst el 30 de Sept. de 2017


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