I have a scrolling container with a height around 2400. As
the container scrolls, the x and y values cycle through from 0 to,
apparently, whatever the screen resolution height is. While there
must be a good reason for this, positioning things that need to be
dragged around the container seems impossible.
My assumption was, of course, that these values represent
only the screen size, however, this can be somewhat misleading. Say
you have a resolution of 1280x 900. If you are dragging an item
that bleeds off the TOP of your container, the mouseY can have a
value of 1275, for example. If you take the same object and drag it
to the bottom of your container, the object can also have a mouseY
value of 1275.