Re: [battery] Alternative design proposal (was: addEventListener side effects, ordering & boundary crossing ...)

Does a laptop actually know there is no battery, or just that the battery level is zero (when the battery is physically removed)?

yet another corner case, thanks for pointing it out :)

regards, Frederick

Frederick Hirsch
Nokia



On Sep 9, 2011, at 8:27 AM, ext Josh Soref wrote:

> Technically a device can go from:
> Corded + no battery (laptop w/ battery removed)
> To
> Corded + battery (user inserts in preparation for travel)
> To
> Battery (user unplugs)
> 
> If an app inits once (likely), then returning null for the first case would yield bad results for the session lifetime
> 
> ----- Original Message -----
> From: Frederick.Hirsch@nokia.com [mailto:Frederick.Hirsch@nokia.com]
> Sent: Friday, September 09, 2011 08:15 AM
> To: dom@w3.org <dom@w3.org>
> Cc: Frederick.Hirsch@nokia.com <Frederick.Hirsch@nokia.com>; anssi.kostiainen@nokia.com <anssi.kostiainen@nokia.com>; public-device-apis@w3.org <public-device-apis@w3.org>; annevk@opera.com <annevk@opera.com>
> Subject: Re: [battery] Alternative design proposal (was: addEventListener   side effects, ordering & boundary crossing ...)
> 
> +1 for the reasons Dom mentions.
> 
> if there is no battery would it make sense for b to be null?
> 
> regards, Frederick
> 
> Frederick Hirsch
> Nokia
> 
> 
> 
> On Sep 9, 2011, at 2:46 AM, ext Dominique Hazael-Massieux wrote:
> 
>> Le vendredi 09 septembre 2011 à 09:01 +0300, Anssi Kostiainen a écrit :
>>> Here's a summary of discussed alternatives:
>>> 
>>> var b = new BatteryStatusEventSource();
>>> b.onbatterystatus = function () {};
>>> 
>>> navigator.battery.start();
>>> navigator.battery.onbatterystatus = function () {};
>>> 
>>> var b = navigator.getBattery();
>>> b.onbatterystatus = function () {};
>>> 
>>> Which one is your favorite, and why?
>> 
>> I think the last one is probably my favorite, but mostly for cosmetic
>> reason: it doesn't add a constructor (which for a singleton seems
>> awkward), and it doesn't need the start() method (which reads weird: it
>> feels like you're starting the battery itself).
>> 
>> Dom
>> 
>> 
>> 
> 
> 
> 
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Received on Friday, 9 September 2011 13:03:55 UTC