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This is an automatically generated e-mail. To reply, visit:
http://reviewboard.kde.org/r/684/
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(Updated 2009-05-15 15:59:05.505733)


Review request for Plasma.


Changes
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Final version of the diff - coding style is now entirely consistent.


Summary (updated)
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To give an icon depicting the current weather, the BBC UK Met. Office backend 
decides whether or not it is day or night using a simple rule: if it's after 
0600GMT but before 1800GMT, it is daytime; otherwise, it's night time.  This 
causes two known issues:

i) For people in the UK, the weather icons indicate night even though sunset is 
not until well after 2000GMT at this time of year
ii) For people outside the UK, day and night are set to an approximation of 
what they are in the UK.  So, for instance, for people in New York, the weather 
icon goes to night at lunchtime.

The attached diff fixes this bug by calculating the actual sunrise/sunset times 
for the weather location, and using /these/ to decide whether it's day or 
night.  How is this done?  Whilst the BBC don't provide sunrise/sunset time in 
the current observations, they do provide latitude and longitude information.  
Given we know:

i) The date
ii) The latitude/longitude

...we can then calculate sunrise and sunset times using a bit of maths.  If you 
look, the diffs for the ion itself are very small: just enough to handle the 
lat/long information, and then calls to sunrise/sunset calculation to decide 
whether it's day or night.  This code has been reused from the time DataEngine 
- so we're not importing lots of new code at this point.


Diffs (updated)
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  /trunk/KDE/kdebase/workspace/plasma/dataengines/time/CMakeLists.txt 968518 
  /trunk/KDE/kdebase/workspace/plasma/dataengines/time/solarposition.h 968518 
  /trunk/KDE/kdebase/workspace/plasma/dataengines/time/time_solar_export.h 
PRE-CREATION 
  /trunk/KDE/kdebase/workspace/plasma/dataengines/weather/ions/CMakeLists.txt 
968518 
  /trunk/KDE/kdebase/workspace/plasma/dataengines/weather/ions/ion_bbcukmet.h 
968518 
  /trunk/KDE/kdebase/workspace/plasma/dataengines/weather/ions/ion_bbcukmet.cpp 
968518 

Diff: http://reviewboard.kde.org/r/684/diff


Testing (updated)
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I use the BBC weather ion for my weather data, so I tested it for my current 
location (fine) and a few others from around the world (also fine).  Has been 
fine for well over a week, becoming increasingly more useful as sunset pushes 
towards 10pm.


Thanks,

Andrew

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