Rails - Jun 2006 - How to make an OSX Finder in rails/AJAX?

I need to make a category browser that would allow nested categories. Is 
there any receipe on that?

Currently, I use the :onchange event from one of the form element to 
update the first select (out of 4-5 selects), but I dont know how to 
elegantly reset all the child selects if I change the value from the 
first.

All the categories are fetched from the DB and I would like a
''generic''
solution to this. My current solution involves too much coupling between 
the Controller and the view and thats a Bad Thing (tm).

Anyone can help with this?

-- 
Posted via http://www.ruby-forum.com/.

Google for acts_as_tree and livetree.

I think the pair is what you''re looking for.

--  
-- Tom Mornini

On Jun 8, 2006, at 1:15 PM, Mantat wrote:
> I need to make a category browser that would allow nested  
> categories. Is
> there any receipe on that?
>
> Currently, I use the :onchange event from one of the form element to
> update the first select (out of 4-5 selects), but I dont know how to
> elegantly reset all the child selects if I change the value from the
> first.
>
> All the categories are fetched from the DB and I would like a  
> ''generic''
> solution to this. My current solution involves too much coupling  
> between
> the Controller and the view and thats a Bad Thing (tm).
>
> Anyone can help with this?
>
> -- 
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails

Tom, you saved me days of troubles!!! Thanks a lot!

I was already using the act_as_tree but my googling never poped the
livetree site.

You have no idea how happy I am! even tho I learned a lot trying to
emulate that thing, I am happy to find something already tested and
complete!

Ye!!!

-- 
Posted via http://www.ruby-forum.com/.

Crap.. .I feel stupid to reply to myself after my previous post but...

I talked too fast! I look at the specs, everything was fine until I 
looked at the screenshots.

The finder offered by livetree is more like the file explorer of 
windows. The Finder on the mac that I was talking about is the one that 
display each ''level'' in a column. So let say we have 3
columns, when you
click on a value in the first column, it fetch the data from the DB then 
populate the second column. Then, when you pick a value from the second 
column, it will update the third.

The problem is if at that time I click on the first column, it needs to 
clear the thrid column and update the second...

I have a solution in my head to do this but it involves a lot of 
javascript and too much coupling between the controller and the view....

So still looking...

-- 
Posted via http://www.ruby-forum.com/.

On Jun 8, 2006, at 8:01 PM, Mantat wrote:
> Crap.. .I feel stupid to reply to myself after my previous post but...
>
> I talked too fast! I look at the specs, everything was fine until I
> looked at the screenshots.
>
> The finder offered by livetree is more like the file explorer of
> windows. The Finder on the mac that I was talking about is the one  
> that
> display each ''level'' in a column. So let say we have 3
columns,
> when you
> click on a value in the first column, it fetch the data from the DB  
> then
> populate the second column. Then, when you pick a value from the  
> second
> column, it will update the third.
Oh, THAT OS X Finder view!

There are 3 of them, after all. :-)

Sorry for the misinformation.

-- 
-- Tom Mornini

these people seem to do a convincing rendition of the finder''s column
view
=)
    http://www.apple.com/downloads/dashboard/

On 6/8/06, Tom Mornini <tmornini@infomania.com>
wrote:
>
> On Jun 8, 2006, at 8:01 PM, Mantat wrote:
>
> > Crap.. .I feel stupid to reply to myself after my previous post but...
> >
> > I talked too fast! I look at the specs, everything was fine until I
> > looked at the screenshots.
> >
> > The finder offered by livetree is more like the file explorer of
> > windows. The Finder on the mac that I was talking about is the one
> > that
> > display each ''level'' in a column. So let say we have
3 columns,
> > when you
> > click on a value in the first column, it fetch the data from the DB
> > then
> > populate the second column. Then, when you pick a value from the
> > second
> > column, it will update the third.
>
> Oh, THAT OS X Finder view!
>
> There are 3 of them, after all. :-)
>
> Sorry for the misinformation.
>
> --
> -- Tom Mornini
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
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unknown wrote:
> these people seem to do a convincing rendition of the finder''s
column
> view
> =)
>     http://www.apple.com/downloads/dashboard/
Actually, they dont.. the column no 3 doesnt clear when you change the 
selected item form colum 1...

This is really not as easy as I fight thought!!! I will keep you 
informed of my progress...

-- 
Posted via http://www.ruby-forum.com/.

Ajax and partials should help you there.

apple.com does this with this structure

<div id="col_1"></div><div
id="col_2"></div><div id="col_3"></div>
Thus. It only updates col_2 when something is selected in col_1.
However. You could organize this like so:
<div id="col_1"><div id="col_2"><div
id="col_3"></div></div></div>

That way. When you do an ajax call to change col_2 it automatically
removes col_3. You just have to include <div
id="col_3"></div> at the
end of your col_2 partial.

On 6/9/06, Mantat <mantat@videotron.ca> wrote:
> unknown wrote:
> > these people seem to do a convincing rendition of the
finder''s column
> > view
> > =)
> >     http://www.apple.com/downloads/dashboard/
>
> Actually, they dont.. the column no 3 doesnt clear when you change the
> selected item form colum 1...
>
> This is really not as easy as I fight thought!!! I will keep you
> informed of my progress...
>
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

-- 
--------------
Jon Gretar Borgthorsson
http://www.jongretar.net/