Hey Bruno,
Yeh sorry we perhaps should have mentioned that in the blog post, when you
press '=' you can then use operators to act on that number ('x','+' etc). Only
by 'ripping off' the calculation do you start fresh.
Calum
On 11 Mar 2013, at 22:44, Bruno Girin wrote:
> Calum,
>
> I'm glad you like the ripping off idea :-)
>
> I have one use case that is not mentioned in the user journeys and that I can
> do with any desktop calculator because of the way = generally works. Say I
> wanted to calculate the following bill:
>
> Paper: 30
> Biz cards: + 50
> Pencils: + 20
> -------
> Total: = 100
> VAT: x 1.2
> Total: = 120
>
> The reason why it works on a desk calculator is that once I type =, the total
> becomes the last number in the stack and any additional operation
> after that applies to the total. It looks like the key journeys should
> accommodate that but wanted to confirm that it was the case.
>
> Cheers,
>
> Bruno
>
> On 11/03/13 14:13, Calum K Pringle wrote:
>> Hey Bruno,
>>
>> Excellent idea about ripping off the history tape - love it.
>>
>> I think we can explore the visual treatment of the number being currently
>> edited. The only editable number is the last entry, it might be a different
>> colour or something too.
>>
>> For clearing, pressing C clears the current entry. To remove the entire
>> calculation you swipe the tape to the side.
>>
>> Sorry for the delay! Think we captured this on our blogpost too :
>> http://design.canonical.com/2013/03/app-patterns-applied-calculator-key-journeys/
>>
>> Calum
>>
>>
>>
>> On 4 Mar 2013, at 20:45, Bruno Girin wrote:
>>
>>> Hi Dalius,
>>>
>>> That looks good except for the following:
>>> There's no backspace,
>>> The C key clears the whole calculation and starts a new one rather than
>>> clearing the last number entered.
>>> As a result of both of the above, if you make a mistake, you have to start
>>> all over again. So you need a simple way to rip off a calculation sheet so
>>> that you can go to the next one while not making it a feature of the C key:
>>> what about just using that exact touch paradigm? Pull the last calculation
>>> sheet up to rip it off and put it on the stack?
>>>
>>> Another glitch is that it is difficult to see what number you're currently
>>> editing: I understand that it's the last one on the stack but you have to
>>> know that, there is no other indicator. If you were to add a backspace key
>>> on the right of the number being edited a la Jolla, that would resolve one
>>> of the problems above and act as a marker of what number you are currently
>>> editing.
>>>
>>> Bruno
>>>
>>> On 04/03/13 20:18, Dalius wrote:
>>>> Hi,
>>>>
>>>> Riccardo Ferrazzo demonstrates one possible approach for simple calculator
>>>> mode:
>>>>
>>>> https://plus.google.com/u/0/107254607903065031665/posts/hYNwdXFRhvK
>>>>
>>>> Direct link to YouTube video:
>>>> http://www.youtube.com/watch?v=ncZUuPgA93w&feature=youtu.be
>>>>
>>>> Code here for those who want to try it out:
>>>> https://code.launchpad.net/~f-riccardo87/ubuntu-calculator-app/new-design
>>>>
>>>> Regards,
>>>> Dalius
>>>>
>>>>
>>>
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