Re: [bug-gv] Page selector window does not show all page numbers

[Markus Steinborn]

On Tue, 20 May 2008, Bernhard R. Link wrote:

> * Juha Takala <address@hidden> [080517]
> > At start, gv does dot display the page numbers in the left side window
> > intended for page selection.  Only after I move mouse in that window, the
> > page numbers become visible.
> >
> > Another problem is that after page 1 + 5 + 523 + 1109 = 1638, the page
> > numbers will not be shown at all.  The pages are there, I can e.g. move to
> > the last page of document by <End> key.
>
> I think this is basically a problem with the naive implemenentation variant
> of scroll lists in Xt: You create a widget for the full list and just show
> a specific part of it depending on some generic scrolling widget.
> While this variant (which I *guess* is used here and responsible for this)
> is the most easy to implement and has some elgance in design, it has the
> serious problem that X window dimensions are 16 bit.

With this new information and some further test, I think you are right.

> * Markus Steinborn <address@hidden> [080520]:

> > Works for me here.

A reminder of bug #18376 (clobbered page-scrolling list): "The gv RPM from 
OpenSuse installs a file /usr/share/X11/app-defaults/GV, which contains e. 
g. settings for a bigger font. These settings are just incompatible with 
gv 3.6.x. [...] With /usr/share/X11/app-defaults/GV from OpenSuse 
installed, you can examine this clobbering with other distributions, too."

As I was who posted that result anonymously and IIRR SuSE took the 
offending patch to gv 3.5.8 from Debian and Juha's gv were from debian 
derivates (this has been the reason why I pointed out that both systems 
Juha mentioned were debian derivates. Debian is known to patch the source 
quite a lot.) I suppose that that patch is contained in debian gv 3.6.x, 
too. It has the side effect of enlarging the fonts being used for the GUI, 
so with 16 bit dimensions less pages are enough to produce an overflow. 
This thoughts lead me to the idee of testing 4000 pages. Here are the 
results:

2000 pages are working here, 4000 pages are not working.

So you have guessed right, I assume. All is making sence now.


Greetings from Germany

Markus Steinborn