Best way to prevent negative autoscroll

We are trying to implement autoscroll but want to be able to limit in which direction the user can extend the drawing. What we are looking for specifically is to limit the user to drag objects into negative bounds of a drawing. ( x || y < 0)

I have looked around but have yet to found a good way to implement this. Any suggestions or ideas would be appreciated!

Check the GoView.ShowsNegativeCoordinates property.

Thank you. That did indeed do the trick! :)