Comment 3 for bug 165727

[Comment copied from dup bug 1095663]

Currently the compensation of stroke-width etc. is in
sp_item_write_transform, which is called only when writing
to the repr. (The functions that sp_item_write_transform
calls tend to call item->updateRepr().)
To provide the desired accurate previewing of stroke width,
I think we'd have a function like the current
sp_item_write_transform except without updating the repr(s).

There are a few areas where inkscape delays updating the
display until either an idle event or the mouse is released.
 Typically these are to improve responsiveness with large
drawings. I don't know offhand whether this is such a case.
 Eventually inkscape may become smarter at handling such
cases, though I'd guess people won't look at that for a while.