State button callback- break while loop?
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Veena Chatti
am 3 Sep. 2020
Kommentiert: Veena Chatti
am 12 Sep. 2020
Hi,
I'm trying to loop through hundreds of frames in a file with the push of a state button and the use of a slider in AppDesigner. With the code below, what I've managed so far is to get it to loop until the end of all frames and then stop.
What I'd like it to do further, however, is to loop continuously until the button is pressed, and stop looping by breaking the while loop when the button is un-pressed.
I would greatly appreciate all your tips and suggestions!
Thanks!
v = app.pswitch.Value;
switch v
case 0
% do nothing
case 1
j = get(app.Slider, 'Value');
while j < 300 % (number of frames)
if v == 1
% do this:
pause(1/1000)
j = get(app.Slider, 'Value');
app.Spinner.Value = j+1; % go to the next frame
app.Slider.Value = j+1; % go to the next frame
app.I = imshow(app.testrgb(:,:,3,j+1), [300 1300],...
'Parent', app.UIAxes); % display the next frame
end
end
app.Spinner.Value = 1;
app.Slider.Value = 1;
set(app.pswitch, 'Value', 0)
otherwise
% do nothing
end
0 Kommentare
Akzeptierte Antwort
Rik
am 3 Sep. 2020
In general the solution to this is to use a flag that is controlled by your button. Then inside the while loop you check for that flag (a simple if flag,break,end will do).
Weitere Antworten (1)
Mohammad Sami
am 3 Sep. 2020
You can try something like this.
app.STOPButton.Enable = true;
app.STOPButton.Value = 0;
while(somecondition)
% do something
if(app.STOPButton.Value == 1)
break;
end
end
app.STOPButton.Enable = false;
app.STOPButton.Value = 0;
6 Kommentare
Rik
am 3 Sep. 2020
The theoretical limit would be eps. As a practical limit I would suggest 30ms.
It isn't hard to test this, just use a loop to make the time smaller until tic,toc is telling you the pause is much longer than the time you asked for. I you want I can write some code for you. I'm currently on mobile so writing an example is more challenging.
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