Fixed sized positionable rectangular ROI

I need to select fixed area Rois from a set of images. I have code working fine that uses imrect - the box is drawn, can be dragged around and waits for a mouseclick to record position but I can't suss out how to do it with drawrectangle - for my own satisfation.

The nearest I've got it to draw rectangle with mouse then resize after, which is clunky and I can't figure out how to make that box draggable. Here's the relevant part of the code, obviously there'd be an image open.

% Get positions
for Roicount=1:Roinumber
    
    Framesize =  [1 1 Lanelength Lanewidth];
    Im1 = imrect(gca, Framesize); %can't see how to do this with drawrectangle
    setResizable(Im1,0);
    Position = wait(Im1);
    
    for m=1:4 %Store positions
        Regions(Roicounter,m)=Position(m);
    end
    
end

The positions are used later to crop out the regions of interest.

Answer 1

[Image Analyst]

Try drawrectangle(). Use can click and drag. Set up a listener that resets the size in the event that they click a handle to change the size.

[ian Handsportman]

That seems like long way round to achieve the same result, why is imrect not recommended?