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Apart from main program, executing function continuously GUI matlab.

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Carlos
Carlos 2017-2-23
评论： Walter Roberson 2017-6-9
Dear experts,
this is Carlos. Now, I'm programming a GUI in Matlab.
In this GUI, I have some buttons and static texts. Particularly, I would like to change the text of a static box continuously, i.e., regardless the changes made in the main program.
Concretely, this static box takes the values from other hardware. The values obtained from this hardware have to be shown constantly. Simultaneously this static box shows the values from the hardware, I would like to press other buttons and carry out other functions.
The concept I look for, probably, is a kind of parallel programming. However, I think an easier solution should have.
Thank you in advance.
Carlos.
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Geoff Hayes
Geoff Hayes 2017-2-24
Carlos - how is save_pos called? Is it from within your GUI or from the command line? Does it have a timer that periodically queries your device for the distance (or some other information)?
Walter Roberson
Walter Roberson 2017-2-24
Carlos, you did not answer the question about what kind of hardware you are interfacing? I have most of the toolboxes and I checked all of the get() functions but get() does not fetch from hardware for any of the ones I have.
The reason that it is important is that there may be other ways of fetching your data asynchronously.

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Jan
Jan 2017-2-23
编辑：Jan 2017-3-8
You can use a timer to update the GUI. Store the handle of the GUI object to be affected in the timer's UserData, such that it is available in the TimerFcn.
function myGUI
FigH = figure;
TextH = uicontrol('Style', 'Text', 'Position', [10, 10, 200, 24]);
TimerH = timer('UserData', TextH, 'TimerFcn', @myTimerFcn, 'Period', 1, ...
'ExecutionMode', 'fixedRate');
drawnow;
start(TimerH);
end
function myTimerFcn(TimerH, EventData)
TextH = get(TimerH, 'UserData');
set(TextH, 'String', datestr(now, 0));
drawnow; % Thanks Walter
end
Store the handle of the timer in the figure's UserData or ApplicationData (e.g. by handles.timerH = timer(...), such that it can be deleted in the CloseRequestFcn of the figure automatically.
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Evrim Yilmaz
Evrim Yilmaz 2017-6-8
Hi Jan, I have tried to compile this code in my matlab gui which is already working. But I get an error for "function mygui" line. Do you know why? Thanks

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