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List:       kde-devel
Subject:    Re: Chinese lunar calender support and improvement for existing
From:       LiuCougar <liucougar () gmail ! com>
Date:       2005-04-29 16:57:10
Message-ID: 9558067805042909571323b512 () mail ! gmail ! com
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thanks a lot for your detailed reply,very helpful.

On 4/29/05, Cornelius Schumacher <schumacher@kde.org> wrote:
> On Friday 29 April 2005 05:23, LiuCougar wrote:
> >
> > I am investigating implementing a Chinese lunar calender in a
> > dedicated library (if necessary). However my final goal is to merge it
> > into KDE.
> 
> Sounds like a good plan.
Do you think it is necessary to split the core to a dedicated library?
AFAICT, KCalendarSystemJalali (shipped with kdelibs) does not rely on
any other libraries, or am I wrong?

> > Anyone could give me some advice about what's the optimal way to achieve
> > this?
> 
> There are two aspects. One is the calendar system itself, that's how the year
> is separated into months, where weeks start etc. This is covered by the
> KCalendarSystem class and its subclasses in kdelibs/kdecore.
> 
> Another aspect are holidays. Holidays which have a fixed date or are relative
> to easter can be handled by a simple holiday file for KOrganizer (see
> kdepim/libkholidays).
it seems to me that the core of chinese lunar calendar should be
derived from KCalendarSystem. As some of Chinese holidays are
gergorian calendar based, while others are chinese lunar calendar
based, so I think I need to write a sub-class of KHolidays to handle
lunar calendar based holidays.

> If more complex calculations are required, they can be done in a
> CalendarDecoration plugin for KOrganizer (see
> kdepim/korganizer/plugins/hebrew for an example).
This plugin seems to handle holidays itself. Do you think it is better
to sub-class KHolidays or use this kind of hardcoded one?

> > I hope when this calender is done, it will find its way to be merged
> > into the existing calander (appear after clicking the clock applet).
> >
> > I have another suggestion about the existing calender: it would be
> > better to show festivals in your country (depends on your locale?). Of
> > course this feature should be optional.
> 
> Yes, we already have lots of code there, but most of it isn't available
> desktop-wide, but only in the kdepim applications. We have to improve that.
> (see also the "Extending KDatePicker" section of
> http://www.kdedevelopers.org/node/view/974).

The idea of "Extending KDatePicker" is what I am looking for: with
this kind of capability, it is possible to add extra info to a date,
such as the name of the chinese lunar day, and some other important
date for a users: say parents' birthday :)

I'd like to contribute in this aspect. 

Ok, I have to start with chinese KCalendarSystem first :)

thanks again for your direction.

Regards,
Cougar
-- 
"People's characters are strengthened through struggle against
difficulties; they are weakened by comfort."
- Old Chinese adage
 
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