Automatically expand JScrollbars

[diasmvds]

Hi all,

I'm developing a drawing tool using Java. This will support drawing diagrams ( basically electrical components in a network ). As the drawing panel ,i have uesd a JPanel within JScrollPane so that user can scroll their diagram. The origin of my drawing panel is the top-left corner of that JPanel.(as default)

This will support rotating and many more facilities. I have got an issue with this rotating. For an example if user draw a one-line diagram (branch ) with few components connected in vertical direction and rotate it to be in horizontal direction ( if this diagram is much closer to left side of the JPanel ) then some of the components in the left side of that drawing will be hidden and i cannot scroll the panel into that negative direction.

If anyone has an idea on how to archive a solution for this, it will be a great help.
(Hope u guys understand the issue i explained above. if not, i can attach a screen shot of this )

Thanks a lot.

Rgds,
Darshana