Rails - Mar 2007 - Digital Clock

Hello Group.
I got my first page up and running and now I''m trying to make it look
a bit nicer.
I was thinking about putting a clock on the page, can anyone point me
to a tutorial or have a routine already done?
I''m currently using the Time.now(:short) form, but that is just
static.
Anyway any help would be greatly appreciated
Thanks
James


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No Ruby required. Just use JavaScript..
http://www.javascript-page.com/clock.html

Preston



On Mar 19, 2007, at 9:03 PM, James wrote:
>
> Hello Group.
> I got my first page up and running and now I''m trying to make it
look
> a bit nicer.
> I was thinking about putting a clock on the page, can anyone point me
> to a tutorial or have a routine already done?
> I''m currently using the Time.now(:short) form, but that is just
> static.
> Anyway any help would be greatly appreciated
> Thanks
> James
>
>
> >

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try AJAX periodically_call_remote

example

# demo4.rhtml
<h1>Test periodically_call_remote</h1>
<div id=''show_date_time_id'' style="background-color:
#eee"></div>
<%= periodically_call_remote(:update =>
''show_date_time_id'',:url =>
{ :action => :show_date_time },
:frequency => 1 )%>

# ajax_controller.rb
  def show_date_time
     render :text=>"Now : #{DateTime.now.to_s}"
  end

On Mar 20, 11:03 am, "James"
<tvwatc...-ihVZJaRskl1bRRN4PJnoQQ@public.gmane.org>
wrote:
> Hello Group.
> I got my first page up and running and now I''m trying to make it
look
> a bit nicer.
> I was thinking about putting a clock on the page, can anyone point me
> to a tutorial or have a routine already done?
> I''m currently using the Time.now(:short) form, but that is just
> static.
> Anyway any help would be greatly appreciated
> Thanks
> James

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try AJAX periodically_call_remote

example

# demo4.rhtml
<h1>Test periodically_call_remote</h1>
<div id=''show_date_time_id'' style="background-color:
#eee"></div>
<%= periodically_call_remote(:update =>
''show_date_time_id'',:url =>
{ :action => :show_date_time },
:frequency => 1 )%>

# ajax_controller.rb
  def show_date_time
     render :text=>"Now : #{DateTime.now.to_s}"
  end

On Mar 20, 11:03 am, "James"
<tvwatc...-ihVZJaRskl1bRRN4PJnoQQ@public.gmane.org>
wrote:
> Hello Group.
> I got my first page up and running and now I''m trying to make it
look
> a bit nicer.
> I was thinking about putting a clock on the page, can anyone point me
> to a tutorial or have a routine already done?
> I''m currently using the Time.now(:short) form, but that is just
> static.
> Anyway any help would be greatly appreciated
> Thanks
> James

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That would be a very unwise decision, for quite a number of reasons:

1) Your server will be bombarded with requests
2) The clock will never show the right time, because of latency  
between the request and the response.

So, if you want to show the right time, use client-side javascript,  
period.

On 22 Mar 2007, at 13:00,
chanin.makarukpinyo-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org wrote:
> try AJAX periodically_call_remote
>
> example
>
> # demo4.rhtml
> <h1>Test periodically_call_remote</h1>
> <div id=''show_date_time_id''
style="background-color: #eee"></div>
> <%= periodically_call_remote(:update =>
''show_date_time_id'',:url =>
> { :action => :show_date_time },
> :frequency => 1 )%>
>
> # ajax_controller.rb
>   def show_date_time
>      render :text=>"Now : #{DateTime.now.to_s}"
>   end


Best regards

Peter De Berdt


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I thought the same thing, just imagine one lets the browsertab open for 
hours without any further action.

Anyway, I need to show my users the servertime, there might be a 
difference to the users machinetime, even if we are talking about a few 
minutes, so the best would be to make an initial call to rubys TimeClass 
for getting the servertime and from then on to display/update the time 
clientside.

Even if it´s offtopic, if someone has an approach it would be very welcome

matthi
> That would be a very unwise decision, for quite a number of reasons:
>
> 1) Your server will be bombarded with requests
> 2) The clock will never show the right time, because of latency 
> between the request and the response.
>
> So, if you want to show the right time, use client-side javascript, 
> period.
>
> On 22 Mar 2007, at 13:00,
chanin.makarukpinyo-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
> <mailto:chanin.makarukpinyo-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
>
>> try AJAX periodically_call_remote
>>
>>
>> example
>>
>>
>> # demo4.rhtml
>>
>> <h1>Test periodically_call_remote</h1>
>>
>> <div id=''show_date_time_id''
style="background-color: #eee"></div>
>>
>> <%= periodically_call_remote(:update =>
''show_date_time_id'',:url =>
>>
>> { :action => :show_date_time },
>>
>> :frequency => 1 )%>
>>
>>
>> # ajax_controller.rb
>>
>>   def show_date_time
>>
>>      render :text=>"Now : #{DateTime.now.to_s}"
>>
>>   end
>>
>
>
>
> Best regards
>
>
> Peter De Berdt
>
>
>
> >

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On 23 Mar 2007, at 09:59, matthibcn wrote:
> I thought the same thing, just imagine one lets the browsertab open  
> for
> hours without any further action.
>
> Anyway, I need to show my users the servertime, there might be a
> difference to the users machinetime, even if we are talking about a  
> few
> minutes, so the best would be to make an initial call to rubys  
> TimeClass
> for getting the servertime and from then on to display/update the time
> clientside.
>
> Even if it´s offtopic, if someone has an approach it would be very  
> welcome
Although it wouldn''t exactly be 100% accurate, it would only differ a  
few seconds from the actual server time. Calculate the offset from  
the server time with the client''s time using one request, then  
display the client side time plus or minus the offset.


Best regards

Peter De Berdt


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If someone could give an example or link on how to calculate the offset 
between clientside and serverside times that would be great.

Thank you in advance.

Peter De Berdt wrote:
> On 23 Mar 2007, at 09:59, matthibcn wrote:
> 
>> clientside.
>>
>> Even if it´s offtopic, if someone has an approach it would be very  
>> welcome
> 
> Although it wouldn''t exactly be 100% accurate, it would only
differ a
> few seconds from the actual server time. Calculate the offset from
> the server time with the client''s time using one request, then
> display the client side time plus or minus the offset.
> 
> 
> Best regards
> 
> Peter De Berdt

-- 
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Answering my on question but after searching google finally found a 
solution.
Here is the link if anyones interested.
http://www.geocities.com/lok_2000_tom/clock.htm

Only change function sClock values in the hours, minutes and seconds to 
rubys Time.now.strftime("%H") for hours and so on.

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