Setting limits on zoom and drag

Hey does anybody out there know how you can convert the movie clip size to a percentage so that you can set limits for zooming and dragging? In other words, if I set an x and y limit for dragging then that changes when I zoom in, such that when the movie clip is at 100% I can drag to a certain spot but when I zoom in and then drag the x and y drag limit prevents one from seeing as much of the clip as you could at 100%. So it would be great to say something to the effect of “whatever zoom level one is at, you can only drag to 90% of the movie clip” so one can’t drag the movie clip outside of the set drag area.

Is that totally confusing?

Any help would be appreciated!

Is that totally confusing?

yes

if you could explain at bit more, or give examples… that’d be great…