how to have a callback function terminate another callback function in a GUIDE gui

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Joseph Kutteh 2021-5-25

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https://ww2.mathworks.cn/matlabcentral/answers/839420-how-to-have-a-callback-function-terminate-another-callback-function-in-a-guide-gui

编辑： Adam Danz 2021-5-25

i am wondering that when i click a button in a gui how can that button terminate what is going on in another callback function?

thank you

matlab version: R2019b

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Answer 1

Adam Danz 2021-5-25

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https://ww2.mathworks.cn/matlabcentral/answers/839420-how-to-have-a-callback-function-terminate-another-callback-function-in-a-guide-gui#answer_708630

编辑：Adam Danz 2021-5-25

For this explanation, callbackFcn1 is the initial callback function and callbackFcn2 is the one that should terminate the first one.

Create a binary flag in your GUI with a default value of false. callbackFcn1 will run as long as the flag is false and there should be lots of checks within callbackFcn1 to determine if the flag is still false. If the flag ever becomes true then two things should happen. 1) use return to exit the callback functions and 2) reset the flag to false.

callbackFcn2 merely sets the flag to true which tells callbackFcn1 to stop at the next check.

Notice that you can only stop callbackFcn1 at check-points to put them in strategic places including within loops.

This answer demonstrates this process in AppDesigner but the same logic is true for GUIDE GUIs.

To set and control the flag in GUIDE, use guidata or getappdata & setappdata.