Using input from a gui in another function

So, I have a program that consists of many function files and one main .m file and .fig file.

I have a certain text box in the GUI and and button, and when the button is clicked, it stores the value of the text box in a variable in the main .m file using handles.

The question I have is, how do I use this value/variable in another function (not the main .m file)? Its basically a user_function that the user can change values by typing new ones in the GUI.

Answer 1

[Abhishek Pandey]

Hello Shawn,

I understand that you want to use the value of a text box in the GUI in another function. To do this, you can get a handle to the text box through the 'handles' structure and pass it as an input argument when you call the function.

For example, to get a handle for the text box (Tag : ‘txtbox1’), and passing it into the user function (say, userfunc), you can use the following lines of code:

hTxt = handles.txtbox1;
userfunc(hTxt);

Inside ‘userfunc’, you can get and set the value of the text box.

To get its value and store it in a new variable ‘c’,

c = str2num(hTxt.String);

To set its value to 45,

hTxt.String = num2str(45);

For more information, refer to this link:

advanced-matlab-handles-and-other-inputs-to-guide-callbacks

I hope this helps!

- Abhishek

Answer 2

[Mohammed Abdallatif]

It seems to be less praticial and to be avoided. Have a look here!

https://de.mathworks.com/matlabcentral/answers/56492-in-a-script-outside-of-gui-how-to-execute-button-callback-function-in-gui#answer_68393