[Okular-devel] Re: page navigation issues in Facing Pages view mode

[Albert Astals Cid]

A Tuesday, July 05, 2011, NJuk Njuk va escriure:
> On Sun, Jul 3, 2011 at 11:06 PM, Christopher Reichert
> <creichert07 at gmail.com
> 
> > wrote:
> > >> the original bug report's account was not dissimilar to mine, where
> > >> the
> > >> 
> > >> user remapped certain keys to what seemed like the logical actions ---
> > >> 
> > >> Next Page / Previous Page --- but the behavior was inconsistent from
> > 
> > what
> > 
> > >> he expected in Facing Pages mode. i don't recall any other similar
> > >> 
> > >> actions listed in the shortcut dialog.
> > > 
> > > As said at the moment we do not let you change the behaviour of
> > 
> > PageUp/Down
> > 
> > > keys to another keys.
> > > 
> > > We can discuss if we should tie them to the NextPage/PrevPage actions.
> > > I really do not have an opinion on that, so i would welcome people
> > > reading this list voicing their opinions.
> > 
> > Doesn't "Forward in Document" and "Back in Document" have this
> > behavior in facing pages mode?? I configured mine toshortcuts and it
> > works perfectly for me ( same behavior as Page up and Page Down, as
> > well as up and down arrows).
> > 
> > IMHO, we should not remap NextPage and PrevPage to have the ability to
> > move the viewport up and down to the next set of pages. This action
> > would do just as bad of a job at describing what is actually
> > happening. Forward in Document/Back in Document is much better at
> > explaining this behavior.
> > 
> > -Christopher
> > _______________________________________________
> > Okular-devel mailing list
> > Okular-devel at kde.org
> > https://mail.kde.org/mailman/listinfo/okular-devel
> 
> i didn't notice these shortcuts, so i played around with them just now.
> 
> to me they seem to move forward / backward in some page view stack.  i was
> testing this on a document that's been up in a window for over a week and,
> as a result, am not sure what pages i had recently viewed, so the behavior
> seemed odd...  for example, successive BackInDocument calls just displayed
> the following pages in order: 10 + 11, 12 + 13, 10 + 11, 8 + 9, and 6 +7.
> 
> it did move both pages in the view simultaneously, but the order is not
> what i was expecting.
> 
> it appears there may be some pushback on having the behavior of NextPage /
> PreviousPage move the view in Facing Pages mode, but i'm curious why?
> 
> (1) what are the use cases for someone wanting to move a single page but
> not both pages in the view?  i personally can't think of one, so maybe i
> am missing something...perhaps, accessibility?

Did not think of it, but yes :D We have a "read current page" functionality so 
if we skip pages (since basically we'd be going 1, 3, 5, 7) there would be no 
easy way to get to page 2 so it can be read, otoh i'm not sure if okular 
itself is accessible enough for that feature to be reachable for people that 
need it :/

Albert

> 
> (2) anecdotally, on the various pdf viewers i use --- acrobat (linux, mac,
> windows), evince (linux), skim (mac), preview (mac) --- the NextPage /
> PreviousPage behavior in Facing Pages mode appears to be consistent among
> all in that they move the view to the next / previous set of pages.  to be
> clear, though, i'm simply using the arrow keys and/or PageUp / PageDown
> keys so am not sure i'm actually calling their respective PageNext /
> PagePrevious actions.