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

From: Juha Takala
Subject: Re: [bug-gv] Page selector window does not show all page numbers
Date: Tue, 20 May 2008 22:46:15 +0300

Markus Steinborn writes on 20.5.2008 18:12:20:
 > 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.

I just downloaded gv 3.6.3 source from ftp://ftp.gnu.org/gnu/gv/, and
compiled it, and the same problem is in it.  Makes sense, if Xt is guilty.

I assume the Xt/Debian maintainers are going to take care of the problem
from now on (if so, I thank you all very much so far).  Or should I report
my findings to some other place?


 > Greetings from Germany
 > Markus Steinborn

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