ScrollOffset
fScrollOffsetStart = ScrollOffset();
where -= ScrollOffset();
BPoint mouseOffset = newOffset - ScrollOffset();
BPoint offset = ScrollOffset();
BPoint offset = ScrollOffset();
fStartScrollOffset = fScrollView->ScrollOffset();
SetScrollOffset(ScrollOffset());
SetScrollOffset(BPoint(value, ScrollOffset().y));
SetScrollOffset(BPoint(ScrollOffset().x, value));
return _ChildRect(hbar, vbar).OffsetToCopy(ScrollOffset());
BPoint ScrollOffset() const;
return fScrollTarget->ScrollOffset();
BPoint ScrollOffset() const;
BPoint scrollOffset = ScrollOffset();