KDED time zone module

[David Jarvie]

On Sunday 01 April 2007 17:08:57 Thiago Macieira wrote:
> David Jarvie wrote:
> > On Sunday 01 April 2007 13:54:06 Thiago Macieira wrote:
> > > David Jarvie wrote:
> > >>The name is used as the index for looking up the KSystemTimeZone
> > >> instance so that the time zone data can be accessed by applications.
> > >> And for display purposes the local time zone name is needed. Note that
> > >> if the TZ environment variable is set, that is used to obtain the name.
> > >> Also note that, except on Solaris, country codes in zone.tab will
> > >> usually enable a match to be made quickly with /etc/localtime.
> > >
> > > How about a special KSystemTimeZone that is the local time zone? It
> > > doesn't have to map to any zone in the database.
>
> > The main problem here is that there won't be a name other than "local
> > zone" to display in user-visible text, or to save as the identity of
> > the time zone which a date/time is measured in.
>
> That's exactly my point: there should be no name other than "Local System
> Timezone".
>
> > So in a time zone
> > selection combo box, for example. "Local zone" would appear together
> > with all the named time zones, and the user may not necessarily know
> > which named zone was equivalent if using somebody else's computer or a
> > computer far from home. Valid iCalendar file entries couldn't be
> > written, for example, because when a time zone is being used, it has to
> > be written with an unambiguous name. If you sent a meeting invitation
> > to somebody in another time zone with "local zone" specified for the
> > time, it wouldn't show correctly in the invitee's calendar. No doubt
> > there are other examples where the time zone name is essential.
>
> I don't know how iCalendar works, but you can't send just the name and
> assume the other side has the same data as you. The file on the other
> side may simply not exist. Shouldn't iCalendar transmit the timezone
> information for the relevant dates?

Yes, it does. But if it was called "local zone", the invitee seeing this could 
get very confused about what time zone was meant.

I'm copying this to the kde-pim list for comments from others who use 
iCalendar. Would it be acceptable for the local time zone not to have a known 
name in the user interface or data files?

-- 
David Jarvie.
KAlarm author and maintainer.
http://www.astrojar.org.uk/kalarm
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