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App Design: stop

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Palma Errico
Palma Errico on 13 Sep 2020
Commented: Mario Malic on 14 Sep 2020
I have a "play" button attached to the "ButtonPlayPushed" callback which plots a dynamic graph (with the function imagesc()).
How can I program a stop button that stops the action of the "play" button?

Accepted Answer

Mario Malic
Mario Malic on 13 Sep 2020
Edited: Mario Malic on 13 Sep 2020
Actually,
In callback for the stop button, set app.stopFlag = true;
Within the plotting function check the property
% You're probably plotting with for loop or something similar,
% so include this into it
if app.stopFlag % assuming app.stopFlag=true means process should abort
return
end
Read this as well.
Credits out to Adam's answer from my similar question
You can use a callback function to change the value of a flag that is checked repeatedly within the plotting commands.
Define the flag as a public property of the app (see instructions) so the external function has access to the flag.
The app's startup function would set the flag to false: app.stopFlag = false;
The callback function would merely set the flag to true: app.stopFlag = true;
Within the external (or internal) function, you can use the condition,
if app.stopFlag % assuming app.stopFlag=true means process should abort
return
end
Note that if you return before the function is complete, you'll need to assign default output values and you may need to add return commands to any other invoking functions.
Then, the flag should be reset: app.stopFlag=false.
  4 Comments
Mario Malic
Mario Malic on 14 Sep 2020
Great to hear!

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