I didn't find a solution to do this with standard drag and drop.
The only one solution I found is : when I click on a ellipse in the right panel (like a menu of icons), I associate this ellipse to the event mousemove.
And so, I can move ellipe, circle, icon and other form. With the next clic, I consider ellipse on X,Y and cursor become back standard.
Did you find a real drag and drop solution ?