I created a GUI with axes that show the "slices" of a 3D matrix ( vol); a slider is used for skipping through the slices. In the slider's callback function I use roipoly to show each slice and manually segment an area from each slice.
function slider_draw_Callback(hObject, eventdata, handles)
slicen = round(get(hObject, 'Value'));
[~, x, y] = roipoly(vol(:, :, slicen));
Now, when I draw a polygon in each slice the roipoly works fine and saves x, y without issues. If I want to skip the 1st slice and draw something in the 2nd, roipoly is still "running" (crosshair visible) but can't draw anything when I click in the axes/image, giving me an eror in command window:
Error using waitfor
Error while evaluating figure WindowButtonMotionFcn
This is expected as roipoly needs a polygon to be drawn for it to be closed and then evoked again when I scroll to the next slice. How can I abort and restart roipoly when I press the slider buttons, essentially giving me the option to draw whenever I want? I've tried using uiwait/uiresume but can't make it work. Thanks.