Design question re: Date Picker - displaying dates in next/previous months in current month's grid

[Eli Cochran]

Seems that this use case is something that should be configurable.  
While in most cases (the default) setting times in the past are  
illegal, I can think of one case where the past is relevant, using the  
date picker in a timeline application.

- Eli

On Feb 4, 2009, at 6:31 AM, Justin wrote:

> Would it also make sense, not to allow the user to move backwards in  
> time, that is prevent them from choosing a month or year that is  
> before the open date. This won't help with days in the same month  
> but it may help if they go back a month or year by accident and are  
> confused because it is all the same colour.
>
> - Justin
> On 4-Feb-09, at 9:11 AM, Anastasia Cheetham wrote:
>
>>
>> On 3-Feb-09, at 2:53 PM, Allison Bloodworth wrote:
>>
>>> 3) We haven't come up with a great design solution to strongly  
>>> distinguish non-selectable dates (e.g. when entering a Due Date  
>>> for an assignment, dates *before* the Open Date shouldn't be  
>>> selectable) and dates in the previous month.
>>
>> In some date pickers I've seen that distinguish between pickable  
>> and non-pickable dates (e.g. hotel room availability), the  
>> distinction is made with green and red coloured backgrounds. I've  
>> always found that to be pretty obvious, given our existing common  
>> associations with those colours. They could probably be combined  
>> with grey vs. black foreground colours for the month distinctions?  
>> You'd probably have to play with shading, etc., and I do see that  
>> you already use background colours to distinguish weekdays from  
>> weekends, but maybe it's an idea to start with?
>>
>> -- 
>> Anastasia Cheetham                   a.cheetham at utoronto.ca
>> Software Designer, Fluid Project    http://fluidproject.org
>> Adaptive Technology Resource Centre / University of Toronto
>>
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Eli Cochran
user interaction developer
ETS, UC Berkeley