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callback problem for a GUI

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Mohammed Alruwaili
Mohammed Alruwaili on 8 Nov 2017
Answered: Brendan Gray on 8 Nov 2017
Hello I have a GUI which allows the user to enter two deferent parameters and inside the GUI I call back another m file that contains the functions. I would like to make my m file use the two entered parameters from GUI. Thanks
  1 Comment
Chandrasekhar
Chandrasekhar on 8 Nov 2017
have you tried creating a function with the entered parameters and calling from GUI

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Answers (1)

Brendan Gray
Brendan Gray on 8 Nov 2017
The best way to do this depends on whether you are building the GUI using App Designer, GUIDE or building it programmatically. However, what may solve your problem is using a cell array to set the callback function. The first element is the function handle for the callback, and any other elements in the cell array are passed as extra arguments to the callback. For example, your callback could look something like this:
function [outputArg1,outputArg2] = callbackFcn(source, ~, param1value, param2value)
% Do something with the parameters
disp(param1value);
disp(param2value);
end
And then the code in the GUI that sets the callback would look something like this
% Create a simple GUI
figure();
edt1 = uicontrol('Style', 'edit', 'String', 'Enter parameter 1', ...
'Units', 'normalized', 'Position', [0.2, 0.7, 0.6, 0.2]);
edt2 = uicontrol('Style', 'edit', 'String', 'Enter parameter 2', ...
'Units', 'normalized', 'Position', [0.2, 0.4, 0.6, 0.2]);
btn = uicontrol('Style', 'pushbutton', 'String', 'Press this', ...
'Units', 'normalized', 'Position', [0.2, 0.1, 0.6, 0.2]);
% Set the callback using a cell array and pass the contents of the
% edit boxes as additional arguments
btn.Callback = {@callbackFcn, edt1.String, edt2.String};

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