Review Request 122229: Smooth the battery remaining time with moving average

[Martin Klapetek]

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https://git.reviewboard.kde.org/r/122229/
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Review request for Plasma.


Repository: plasma-workspace


Description
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This makes the remaining time in the battery applet much more smoother and does not jump up and down by hours when running some short-time extensive tasks. Whenever the battery gets below 20%, the smoothing is relaxed and the averaged value is much more closer to the powerdevil value.

Couple graphs showing the difference are attached. As you can see, the blue is what powerdevil reports, the orange is the smoothed out value. The bigger graph then also shows battery percentage for better idea.

Obviously a 5.3 material.

At this point I'd like to get some more data to see if we need to tweak the alpha more. So please try out this patch, run with "plasmashell 2>&1 | grep movingAverage" (or use your other favorite filtering way), use your laptops casually or try also some heavy load. The output will then have all the values and it'd be awesome if you mailed them to me directly.

Thanks


Diffs
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  applets/batterymonitor/package/contents/ui/batterymonitor.qml 57801a9 

Diff: https://git.reviewboard.kde.org/r/122229/diff/


Testing
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Tried running for couple days and collected quite some samples, definitely looks better than the time jumping all over.


File Attachments
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Graph 1
  https://git.reviewboard.kde.org/media/uploaded/files/2015/01/23/b4533731-40f3-4037-b87e-02a0888650d6__snapshot_J27264.png
Graph 2
  https://git.reviewboard.kde.org/media/uploaded/files/2015/01/23/0634bdd1-e717-4c6b-8130-b7fabd31e068__chart_2.png


Thanks,

Martin Klapetek

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