Changing drawellipse to drawcircle doesn't work like I wished

I had a few lines of code running with the command drawellipse.

f = figure;
set(f,'Name',['cropping image "',imageName,'"'],'NumberTitle','off','units','normalized','position',[0.075,0.0375,0.85,0.85]);
Opt.Interpreter = 'tex';
Opt.WindowStyle = 'normal';

%% define ellipse
% show the image and draw an ellipse to the ROI
subplot(1,1,1);
imshow(image)
title('Please draw ellipse.');
roi = drawellipse;
waitfor(msgbox('Please adjust the ellipse on the original image manually and confirm it here \bfafterwards\rm with ok.','Ellipse correctly positioned','none',Opt));
roi = addlistener(roi,'ROIMoved',@allevents);

Then I tried to change it to a circle, that has a given radius (in pixels) and only needs to be placed at the right position. So that you only have to find the position for the center.

%% nothing changed above

%% define ellipse
% show the image and place a circle to the right ROI
subplot(1,1,1);
imshow(image)
title('Please place circle.');
roi = drawcircle('radius',Radius,'InteractionsAllowed','translate');
waitfor(msgbox('Please adjust the circle on the original image manually and confirm it here \bfafterwards\rm with ok.','Circle correctly positioned','none',Opt));
roi = addlistener(roi,'ROIMoved',@allevents);

It doesn't work as I thought, because when I click anywhere it only creates a dot that can be moved. Although I can create a circle by pulling the clicked mouse across the image. But I want to see the whole circle with the given radius by clicking once and the possiblity to translate it across the image to the right position.

Answer 1

[Jonas Thomalla]

I don't know why it works right now, but I changed the drawcircle/drawellipse to images.roi.Ellipse with fixed values.

%% nothing changed above

%% define ellipse
% show the image and place a circle to the right ROI
subplot(1,1,1);
imshow(image)
title('Please place circle.');
roi = images.roi.Ellipse(gca,'Center',[200,200],'Semiaxes',[Radius,Radius],'FixedAspectRatio',true,'InteractionsAllowed','translate');
waitfor(msgbox('Please adjust the circle on the original image manually and confirm it here \bfafterwards\rm with ok.','Circle correctly positioned','none',Opt));
roi = addlistener(roi,'ROIMoved',@allevents);

Now it creates a ROI that is fixed in aspect ratio and radius of the circle. You are only allowed to move the circle around your image.