[Trac #1251] Include improved calculator

[Zarro Boogs per Child]

#1251: Include improved calculator
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 Reporter:  rwh            |        Owner:  J5     
     Type:  enhancement    |       Status:  new    
 Priority:  normal         |    Milestone:  Trial-2
Component:  new component  |   Resolution:         
 Keywords:                 |  
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Comment (by AlbertCahalan):

 Replying to [comment:11 cjb]:

 >  * Calculadora uses ce/ac, which are probably understood internationally
 much better than Calc's "Mode" and "Clear".  Activities should avoid
 English words where possible.

 No, they should be localized where possible. It's far better to use
 gettext("Mode") and gettext("Clear") than to use "ce" and "ac". Icons need
 localization too, with the easy method being gettext("some-icon.png").
 Even colors can sometimes need localization.

 > Given Calculadora's lack of scientific functions (there isn't even a
 sqrt(), or parens for indicating precedence) I'd go with Calc.  If we have
 time, the most urgent patches I would take to Calc are adding a "CE"-style
 clear, and replacing "Mode" with an icon and using "CE" and "AC" as labels
 (if not icons for them too).

 Please don't take away the English locale. Some kids only know English.
 Both "CE" and "AC" are meaningless in English.

 >  * and / should also be replaced with × and ÷, as ywwg said.

 All four keys should work.

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Ticket URL: <http://dev.laptop.org/ticket/1251#comment:12>
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