[GRASS-dev] list organization of g.list output

Michael Barton michael.barton at asu.edu
Thu May 24 15:59:40 EDT 2007

Thanks very much. I will now need to relook at how the custom select class
works in wxPython because this is a nicer way to get a list of maps than
listing from the CELL directory.


On 5/24/07 12:38 PM, "Paul Kelly" <paul-grass at stjohnspoint.co.uk> wrote:

> On Thu, 24 May 2007, Paul Kelly wrote:
>> On Thu, 24 May 2007, Francesco P. Lovergine wrote:
>>> ls changes to single column when ever stdout is not a tty.
>>> That approach could be useful in the g.list case also I think.
>> That sounds like a good idea, although perhaps a little bit too much like
>> guessing what you want to do and doing it for you (isn't there ls -1 for
>> that?). I think the best way to handle this is to re-arrange the G_ls*
>> functions in lib/gis/ls.c to do whatever we need, and make lib/gis/list.c use
>> them. I already have a prototype working which does both the 1-column output
>> and Markus's preferred ordering, but am trying to decide if it's worth adding
>> an argument to some of the G_ls* functions to say how many items to print per
>> line, or if it should always be determined automatically. The only thing I
>> can think that a perline option would be useful would be if you wanted
>> 1-column output for this sort of thing - if we made that automatic depending
>> on where stdout was going might that be enough functionality??
> On further consideration, I decided to leave out the automatic bit and
> keep an option in the new function G_ls_format() {which I separated out
> from G_ls()} to specify the number of items to print per line. By default
> it will use the minimum number of rows it needs but print columnwise first
> rather than rowwise first. The main reason to not detect automatically was
> for output in gis.m's gronsole.tcl - it isn't writing directly to a
> terminal there, but you still want the output to appear in neat columns.
> I also updated g.list (in fact lib/gis/list.c) to use the G__ls() and
> G_ls_format() rather than doing everything itself. If someone wants to add
> an option to g.list for 1-column output it should be possible now (by
> changing the argument passed to G_ls_format()).
> All updated now in CVS.
> Paul

Michael Barton, Professor of Anthropology
School of Human Evolution & Social Change
Center for Social Dynamics and Complexity
Arizona State University

phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton 

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