Rails spinoffs - Jul 2007 - trying to find info on saving movable divs w/ cookies

problem: i have a page full of divs (a la iGoogle) that are movable. i
need to be able to save the page layout pref. in cookies when the user
leaves the page, so the divs will appear in the same configuration
when they user comes back. so far my searches have been fruitless.

i''m using sortables in script.aculo.us, and i think what i need might
already be in the code someplace. but i''m a total n00b, so if anyone
can point me in the right direction, i''d be much abliged.


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Are you sure you want to store it in cookies, and not something more  
durable?  In addition to the obvious issues of users rejecting/ 
deleting cookies, you''re limited to 20 per domain, an upper size  
limit of each cookie (4K), and the browser may limit the total number  
of cookies allowed across all sites.  If storing the position is  
important, you may wish to put it in a db via Ajax calls.

Check the docs for functions to get an element''s position.



TAG

On Jul 2, 2007, at 3:10 PM, d.kyle.hall-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
wrote:
>
> problem: i have a page full of divs (a la iGoogle) that are movable. i
> need to be able to save the page layout pref. in cookies when the user
> leaves the page, so the divs will appear in the same configuration
> when they user comes back. so far my searches have been fruitless.
>
> i''m using sortables in script.aculo.us, and i think what i need
might
> already be in the code someplace. but i''m a total n00b, so if
anyone
> can point me in the right direction, i''d be much abliged.
>
>
> >

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1) You need to, without using cookies, be able to store your screen
layout information in a single string. I suggest name/value pairs
using a simple separator that you and then Split() to get back your
data.

2) Re-build your screen layout using that same string.

3) Once you''ve mastered that then move onto storing the same data in a
cookie, since cookies can only store strings.

Here''s a few simple functions for reading/writing cookies.

function getCookie(c_name) {
	if (document.cookie.length>0)
	  {
	  c_start=document.cookie.indexOf(c_name + "=")
	  if (c_start!=-1)
		{
		c_start=c_start + c_name.length+1
		c_end=document.cookie.indexOf(";",c_start)
		if (c_end==-1) c_end=document.cookie.length
		return unescape(document.cookie.substring(c_start,c_end))
		}
	  }
	return ""
}

function setCookie(c_name,value,expiredays) {
	var exdate=new Date()
	exdate.setDate(exdate.getDate()+expiredays)
	document.cookie=c_name+ "=" +escape(value)+
	((expiredays==null) ? "" :
";expires="+exdate.toGMTString())
}



On Jul 2, 5:10 pm,
"d.kyle.h...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org"
<d.kyle.h...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> problem: i have a page full of divs (a la iGoogle) that are movable. i
> need to be able to save the page layout pref. in cookies when the user
> leaves the page, so the divs will appear in the same configuration
> when they user comes back. so far my searches have been fruitless.
>
> i''m using sortables in script.aculo.us, and i think what i need
might
> already be in the code someplace. but i''m a total n00b, so if
anyone
> can point me in the right direction, i''d be much abliged.

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i would love to be able to store the information in a DB.
unfortunately, i''d have more luck curing cancer than i would getting
access to our DBs from the systems guys. however, the TOS of the app
i''m building this for requires users to accept cookies, as we use them
for other authentication purposes. so that''s not an issue. plus, my
superiors prefer things done fast rather than done right, so i''m ok w/
quick and dirty.

On Jul 2, 5:20 pm, Tom Gregory <t...-PGZyUNKar/Q@public.gmane.org>
wrote:
> Are you sure you want to store it in cookies, and not something more
> durable?  In addition to the obvious issues of users rejecting/
> deleting cookies, you''re limited to 20 per domain, an upper size
> limit of each cookie (4K), and the browser may limit the total number
> of cookies allowed across all sites.  If storing the position is
> important, you may wish to put it in a db via Ajax calls.
>
> Check the docs for functions to get an element''s position.
>
> TAG
>
> On Jul 2, 2007, at 3:10 PM,
d.kyle.h...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org wrote:
>
>
>
> > problem: i have a page full of divs (a la iGoogle) that are movable. i
> > need to be able to save the page layout pref. in cookies when the user
> > leaves the page, so the divs will appear in the same configuration
> > when they user comes back. so far my searches have been fruitless.
>
> > i''m using sortables in script.aculo.us, and i think what i
need might
> > already be in the code someplace. but i''m a total n00b, so if
anyone
> > can point me in the right direction, i''d be much abliged.

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Allow me to provide a somewhat more helpful link to Prototype''s  
position functions:
http://prototypejs.org/api/position

FYI, one of the core developers just mentioned these functions will  
be moved to the Element namespace in version 1.6  I don''t know what  
that means for the future of Position namespace, i.e. whether they  
will keep it backwards compatible or not.


TAG

On Jul 6, 2007, at 11:45 AM, d.kyle.hall-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
wrote:
>
> i would love to be able to store the information in a DB.
> unfortunately, i''d have more luck curing cancer than i would
getting
> access to our DBs from the systems guys. however, the TOS of the app
> i''m building this for requires users to accept cookies, as we use
them
> for other authentication purposes. so that''s not an issue. plus,
my
> superiors prefer things done fast rather than done right, so i''m
ok w/
> quick and dirty.
>
> On Jul 2, 5:20 pm, Tom Gregory <t...-PGZyUNKar/Q@public.gmane.org>
wrote:
>> Are you sure you want to store it in cookies, and not something more
>> durable?  In addition to the obvious issues of users rejecting/
>> deleting cookies, you''re limited to 20 per domain, an upper
size
>> limit of each cookie (4K), and the browser may limit the total number
>> of cookies allowed across all sites.  If storing the position is
>> important, you may wish to put it in a db via Ajax calls.
>>
>> Check the docs for functions to get an element''s position.
>>
>> TAG
>>
>> On Jul 2, 2007, at 3:10 PM,
d.kyle.h...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org wrote:
>>
>>
>>
>>> problem: i have a page full of divs (a la iGoogle) that are  
>>> movable. i
>>> need to be able to save the page layout pref. in cookies when the  
>>> user
>>> leaves the page, so the divs will appear in the same configuration
>>> when they user comes back. so far my searches have been fruitless.
>>
>>> i''m using sortables in script.aculo.us, and i think what i
need
>>> might
>>> already be in the code someplace. but i''m a total n00b, so
if anyone
>>> can point me in the right direction, i''d be much abliged.
>
>
> >

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