How to control GUI with external m-file

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Leo Zhai 2019-12-12

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https://ww2.mathworks.cn/matlabcentral/answers/496284-how-to-control-gui-with-external-m-file

评论： Leo Zhai 2019-12-19

采纳的回答： Leo Zhai

I created a GUI, named 'StartEngine', there is a button 'Run'(handles.pushbutton1) on the GUI.

Now, I opened the GUI and I want to make Background color of this button to be gray with a m-file.

It means how could I implement the following command out of StartEngine.m (corresponding to StartEnge.fig)

set(handles.pushbutton1, 'BackgroundColor', [0.5, 0.5, 0.5]);

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Leo Zhai 2019-12-18

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https://ww2.mathworks.cn/matlabcentral/answers/496284-how-to-control-gui-with-external-m-file#answer_406905

Thanks to Andreas Bernatzky, Adam Danz, Walter Roberson, Mohammad Sami and Rik

I figure out an alternative solution, which do NOT use "control GUI with external m-file" but use "GUI control itself with feedback of external m-file"

Before, I thought the GUI(StartEngine.m) and the external m-file(ExcuteRun.m) run parallel, GUI will not "wait for" the external m-file runing to end and get its result/output.

Now, I found the code is "single-thred", GUI will continue after external m-file run to end.

By the way, I did not find error until now. I wonder if some risk exists using this way.

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Adam Danz 2019-12-19

在 MATLAB Online 中打开

Sounds like a decent plan, except part 2 ;)

One difficulty you may experience is troubleshooting any of those components when something goes wrong. Let's say you have a variable named "V" in one of the xx.m files in the bottom row. V should always be a positive integer but you noticed it's value is NaN. You have no idea where that value is coming from. It could come from any of these possibilities:

from StartEngine
from xx.m #1
from xx.m #2
From within ExecuteRun.m
from an interaction in ExecuteRun between StartEngine and xx.m #1
from an interaction in ExecuteRun between StartEngine and xx.m #2
from an interaction in ExecuteRun between xx.m #1 and xx.m #2 within

and lots of other possibilities. This organization often make reproducibility difficult or even impossible.

One way to deal with many input and output variable is to organize them into a structure. For example,

function [motion, position] = movingObject(action)
end

Where the ouputs & inputs contains many fields

motion.velocity
motion.acceleration
motion.previousPosition
motion.currentPosition
% etc...

Anyway, I'm sure you'll figure this stuff out soon.

Leo Zhai 2019-12-19

Thanks for your greate advice, I will think through it.

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