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List: kde-core-devel
Subject: Re: Review Request: Add new KDate class to simplify date localization
From: "David Jarvie" <djarvie () kde ! org>
Date: 2010-10-26 13:36:26
Message-ID: 20101026133626.552.87811 () vidsolbach ! de
[Download RAW message or body]
> On 2010-10-26 13:19:16, Parker Coates wrote:
> > "I have named it KDate, but there is the possibility people may get confused and \
> > think that KDateTime also localizes datetime's, but that is not the case. If \
> > people think this will be a problem KLocalizedDate is an alternative if more \
> > awkward name."
> > My personal feeling is that "KLocalizedDate" is a better name for a few reasons.
> > * "KLocalizedDate" explicitly says what this class does that QDate doesn't.
> > * Although there are exceptions, a common assumption is that if Qt has a \
> > QSomething class, KDE's KSomething class probably inherits from \
> > it.
> > * The typical advice I see given is that if there's KSomething class and a \
> > QSomething class, KDE code should use the KSomething class. It's my understanding \
> > that your intention is not for all KDE code to switch to KDate, only code which \
> > displays dates to users, right?
> > * As you mention, this class is completely unrelated to KDateTime so it'd be nice \
> > to avoid any potential confusion. (By the arguments above, I guess KDateTime \
> > should have been named KTZDateTime or something similar.)
I agree with Parker.
- David
-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
http://svn.reviewboard.kde.org/r/5692/#review8367
-----------------------------------------------------------
On 2010-10-25 20:54:08, John Layt wrote:
>
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> http://svn.reviewboard.kde.org/r/5692/
> -----------------------------------------------------------
>
> (Updated 2010-10-25 20:54:08)
>
>
> Review request for kdelibs.
>
>
> Summary
> -------
>
> The KCalendarSystem api for localizing dates is awkward, inconvenient, unintuitive, \
> and long-winded, causing many mistakes to be made or localization to be ignored \
> altogether. This change adds a new KDate class designed to make localizing dates \
> as easy as using QDate.
> Some QDate code may look like:
>
> QDate myDate( aYear, aMonth, aDay );
> int doy = myDate.dayOfYear();
>
> The KDE localized date code looks something like:
>
> QDate myDate;
> KGlobal::locale()->calendar()->setDate( myDate, aYear, aMonth, aDay );
> int doy = KGlobal::locale()->calendar()->dayOfYear( myDate );
>
> The localized KDate code would look like:
>
> KDate myDate( aYear, aMonth, aDay );
> int doy = myDate.dayOfYear();
>
> Much easier.
>
> KDate is a thin wrapper around KCalendarSystem and QDate, with a near identical api \
> to QDate and as such can be used as a drop-in replacement with very few changes. \
> Some deprecated or unnecessary KCalendarSystem methods have not been included, but \
> these can still be accessed via the calendar() methods. Some new convenience \
> methods have also been added such as setCurrentDate() and addYearsOn().
> Some methods have QDate overloads for convenience, and the assignment and \
> comparison operators partially work with QDate on the rhs. If anyone knows how to \
> make it work with QDate on the lhs, or any other QDate compatibility ideas, I'm all \
> ears.
> For now I only intend this to be used as a convenience class by apps internally and \
> not to be used in kdelibs api as I don't see much advantage in that, but I may do \
> so if the demand for convenience is there.
> I have named it KDate, but there is the possibility people may get confused and \
> think that KDateTime also localizes datetime's, but that is not the case. If \
> people think this will be a problem KLocalizedDate is an alternative if more \
> awkward name.
>
> Diffs
> -----
>
> /trunk/KDE/kdelibs/kdecore/CMakeLists.txt 1189756
> /trunk/KDE/kdelibs/kdecore/date/kdate.h PRE-CREATION
> /trunk/KDE/kdelibs/kdecore/date/kdate.cpp PRE-CREATION
> /trunk/KDE/kdelibs/kdecore/tests/kcalendartest.h 1189756
> /trunk/KDE/kdelibs/kdecore/tests/kcalendartest.cpp 1189756
>
> Diff: http://svn.reviewboard.kde.org/r/5692/diff
>
>
> Testing
> -------
>
> Full unit tests included.
>
>
> Thanks,
>
> John
>
>
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This is an automatically generated e-mail. To reply, visit:
<a href="http://svn.reviewboard.kde.org/r/5692/">http://svn.reviewboard.kde.org/r/5692/</a>
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<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;"> <p style="margin-top: 0;">On October 26th, 2010, 1:19 p.m., <b>Parker \
Coates</b> wrote:</p> <blockquote style="margin-left: 1em; border-left: 2px solid \
#d0d0d0; padding-left: 10px;"> <pre style="white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;">"I have named it KDate, but there is the possibility people may get \
confused and think that KDateTime also localizes datetime's, but that is not the \
case. If people think this will be a problem KLocalizedDate is an alternative if \
more awkward name."
My personal feeling is that "KLocalizedDate" is a better name for a few \
reasons.
* "KLocalizedDate" explicitly says what this class does that QDate \
doesn't.
* Although there are exceptions, a common assumption is that if Qt has a QSomething \
class, KDE's KSomething class probably inherits from it.
* The typical advice I see given is that if there's KSomething class and a \
QSomething class, KDE code should use the KSomething class. It's my understanding \
that your intention is not for all KDE code to switch to KDate, only code which \
displays dates to users, right?
* As you mention, this class is completely unrelated to KDateTime so it'd be \
nice to avoid any potential confusion. (By the arguments above, I guess KDateTime \
should have been named KTZDateTime or something similar.)</pre> </blockquote>
</blockquote>
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">I agree with \
Parker.</pre> <br />
<p>- David</p>
<br />
<p>On October 25th, 2010, 8:54 p.m., John Layt wrote:</p>
<table bgcolor="#fefadf" width="100%" cellspacing="0" cellpadding="8" \
style="background-image: \
url('http://svn.reviewboard.kde.orgrb/images/review_request_box_top_bg.png'); \
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solid;"> <tr>
<td>
<div>Review request for kdelibs.</div>
<div>By John Layt.</div>
<p style="color: grey;"><i>Updated 2010-10-25 20:54:08</i></p>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: \
1px solid #b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;">The KCalendarSystem api for localizing dates is awkward, inconvenient, \
unintuitive, and long-winded, causing many mistakes to be made or localization to be \
ignored altogether. This change adds a new KDate class designed to make localizing \
dates as easy as using QDate.
Some QDate code may look like:
QDate myDate( aYear, aMonth, aDay );
int doy = myDate.dayOfYear();
The KDE localized date code looks something like:
QDate myDate;
KGlobal::locale()->calendar()->setDate( myDate, aYear, aMonth, aDay );
int doy = KGlobal::locale()->calendar()->dayOfYear( myDate );
The localized KDate code would look like:
KDate myDate( aYear, aMonth, aDay );
int doy = myDate.dayOfYear();
Much easier.
KDate is a thin wrapper around KCalendarSystem and QDate, with a near identical api \
to QDate and as such can be used as a drop-in replacement with very few changes. \
Some deprecated or unnecessary KCalendarSystem methods have not been included, but \
these can still be accessed via the calendar() methods. Some new convenience methods \
have also been added such as setCurrentDate() and addYearsOn().
Some methods have QDate overloads for convenience, and the assignment and comparison \
operators partially work with QDate on the rhs. If anyone knows how to make it work \
with QDate on the lhs, or any other QDate compatibility ideas, I'm all ears.
For now I only intend this to be used as a convenience class by apps internally and \
not to be used in kdelibs api as I don't see much advantage in that, but I may do \
so if the demand for convenience is there.
I have named it KDate, but there is the possibility people may get confused and think \
that KDateTime also localizes datetime's, but that is not the case. If people \
think this will be a problem KLocalizedDate is an alternative if more awkward \
name.</pre> </td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: \
1px solid #b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;">Full unit tests included.</pre> </td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">
<li>/trunk/KDE/kdelibs/kdecore/CMakeLists.txt <span style="color: \
grey">(1189756)</span></li>
<li>/trunk/KDE/kdelibs/kdecore/date/kdate.h <span style="color: \
grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdelibs/kdecore/date/kdate.cpp <span style="color: \
grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdelibs/kdecore/tests/kcalendartest.h <span style="color: \
grey">(1189756)</span></li>
<li>/trunk/KDE/kdelibs/kdecore/tests/kcalendartest.cpp <span style="color: \
grey">(1189756)</span></li>
</ul>
<p><a href="http://svn.reviewboard.kde.org/r/5692/diff/" style="margin-left: \
3em;">View Diff</a></p>
</td>
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</table>
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