On Sun, Sep 16, 2007 at 04:27:04AM +0200, Tommaso Cucinotta wrote:
> Hi,
>
> I couldn't really understand what information is
> stored inside the BufferView.offset_ref_ variable.
> At a first glance, it would seem that anchor_ref_
> stores the "paragraph offset" that is displayed from
> the WorkArea top line, and offset_ref_ stores the
> "pixel offset". Namely, the top WorkArea line of
> pixels would display the offset_ref_-th line of
> the anchor_ref_-th paragraph.
Almost right. IIRC anchor_ref_ represents the top visible paragraph,
and offset_ref_ the offset, in pixels, of the cursor position (which may
be in a later paragraph).
"Normalization" means making the cursor paragraph the top one on-screen.
> Even if I keep these two values in sync with the scrollbar,
> it seems there are other variables that decide what pars
> the workarea starts displaying from the top.
Yes.
> Moreover, what var decides how the gray text background
> is cut at the end of the doc ?
Yes, that is tricky. It's years ago that I looked at this :-(
I suspect it is in GuiWorkArea::setScrollbarParams():
// do what cursor movement does (some grey)
h += height() / 4;
> Thanx,
>
> T.
- Martin
