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List:       qgis-developer
Subject:    Re: [QGIS-Developer] QDateTimeEdit: setting a useful minimum Date
From:       John Layt <jlayt () kde ! org>
Date:       2017-07-11 19:31:12
Message-ID: CAM1DM6==1v89-WRTDMRO-BD+_AMZ3OTE+PUdssEDdGw+iW0wew () mail ! gmail ! com
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On 11 July 2017 at 17:28, Mark Johnson <mj10777@googlemail.com> wrote:

> While working on an overhaul of the QgsSpatiaLiteProvider (for Spatialite
> 4.5.0), I just completed the portion for setting the default DATE/DATETIME
> etc. only to find that for the QDateTimeEdit class, the beginning or the
> world is determined by the Act of Parliament of 1751 (Calendar Act) - which
> is a disaster for any Historical Database for any event before 1752-09-14.
>

Fortunately, historical dates and time zones are are two of QDateTime
'bugs' I fixed for Qt5. To that extent, the future is brighter for the past
in QGIS 3 :-) Sadly at the time there was no QtWidgets maintainer so the
QDateTimeEdit patch to use it didn't get in. It may have been fixed in a
recent Qt5 release though, I think I saw a patch float past sometime in the
the last year or so...

Of course, that doesn't help you right now :-)

John.

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<div dir="ltr">On 11 July 2017 at 17:28, Mark Johnson <span dir="ltr">&lt;<a \
href="mailto:mj10777@googlemail.com" \
target="_blank">mj10777@googlemail.com</a>&gt;</span> wrote:<br><div \
class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" \
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div \
dir="ltr">While working on an overhaul of the  QgsSpatiaLiteProvider (for Spatialite \
4.5.0), I just completed the portion for setting the default DATE/DATETIME etc. only \
to find that for the QDateTimeEdit  class, the beginning or the world is determined \
by the  Act of Parliament of 1751 (Calendar Act) - which is a disaster for any \
Historical Database for any event before \
1752-09-14.</div></blockquote><div><br></div><div>Fortunately, historical dates and \
time zones are are two of QDateTime &#39;bugs&#39; I fixed for Qt5. To that extent, \
the future is brighter for the past in QGIS 3 :-) Sadly at the time there was no \
QtWidgets maintainer so the QDateTimeEdit patch to use it didn&#39;t get in. It may \
have been fixed in a recent Qt5 release though, I think I saw a patch float past \
sometime in the the last year or so...<br><br></div><div>Of course, that doesn&#39;t \
help you right now :-)<br><br></div><div>John.<br><br></div></div></div></div>


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