Since Matlab does not have a "kill all tasks" command, you can continuously check the value of a flag within the function and stop execution when the flag changes. Here are two approaches.
Use a StateButton
- Add a StateButton named "Stop" (or whatever you want to name it).
- Initialize the button's state as off either in Design Mode or in the startup: app.StopButton.Value=false
- Pass the app object into your external function.
- Add a condition that stops execution when the StateButton value is true and toggle the button back to it's default state.
if app.StopButton.Value
app.StopButton.Value = false;
return
% or error('User stopped execution')
end
- In some circumstances, you may need to add drawnow limitrate just before the conditional statement to force a graphics update so that the button state change is recognized.
Create a flag
You can use any callback function to change the value of a flag that is stored as an app property.
- Define the flag as a public property of the app (see instructions) so the external function has access to the flag.
- Set the flag to false in the app's startup function: app.stopFlag = false;
- In a callback function that triggers termination, set the flag to true: app.stopFlag = true;
- Within the external (or internal) function, check the value of the flag in a conditional statement and use the same logic as above.
if app.stopFlag % assuming app.stopFlag=true means process should abort
app.stopFlag = false;
return
% or error('User stopped execution')
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.
