Jeffrey Kretz wrote:
Ken,
Do you have a test case page online somewhere I could take a look at?
I've successfully implemented a scrollTo-type function using offsets
and rows, and if I can see the page you're working with I might be
able to suggest something.
Jeffrey, thanks but I actually figured it out. I made up a simple test,
which I'll be happy to post probably tomorrow.
What I realized is that there were a few more steps than I thought. I
had figured that a TR would get an offset() automatically with respect
to its TBODY. Instead I found I had to get the offset() (or position,
I forget which one) for several items, and do a little arithmetic to get
the position of the TR relative to its TBODY. Once I figured that out
the remaining arithmetic was fairly straightforward.
Also I realized I had to take into account the height of the TR,
otherwise I would scroll to the top of it and it would still be invisible :)
JK
*From:* jquery-en@googlegroups.com [mailto:[EMAIL PROTECTED]
*On Behalf Of *Kenneth Downs
*Sent:* Sunday, November 02, 2008 3:58 PM
*To:* jquery-en@googlegroups.com
*Subject:* [jQuery] Re: Trying to grasp basics of scrolling a TBODY
Dan Switzer wrote:
Ken,
I'm trying to grasp the basics of scrolling to a particular row in a
TABLE.
Let's say you've got a TABLE, with a TBODY that has a fixed height and
overflow: scroll.
It appears I ought to be able to use core functions like offset() and
scrollTop() to work out where a row is and scroll the TBODY to that
position, but lots of trial and error has left me lost on why these
things don't seem to work as I expect.
The particular case I am looking at involves the user using arrow keys
to navigate up and down. Its easy enough to use .next() to highlight
the next row, but if a user keeps doing it, and the next row is below
the viewable scroll region, I need to be able to slide up the display
to show the highlighted row.
This is an educational venture, not a practical one, I'd like to
understand it myself, not find and use a plugin that does it already.
Scrolling with the TBODY tag is spotty. IE6 doesn't support it at
all--you need to place your table in a DIV that has a fixed height and
overflow set to scroll.
Thankfully I have no interest in IE 6 :)
I currently have the DIV system you describe. My best construction of
why it does not work is this:
1) There is a div that represents "TBODY". It has "clear:both" as a
CSS row
2) Each row is a div inside of the "TBODY" div
3) Each "cells" must be a div, firefox does not support widths on
spans (don't know about IE, doesn't matter if firefox won't do it)
4) The "cells" must be float: left
5) ...and at the end I get .offset() returning meaningless numbers for
the "row" divs. All divs in the body return 0 as the offset.
6) For good measure, the .scrollTo() extension does not work at all on
this simulated TABLE, which I suspect is related to these bogus numbers.
7) I *think* the clear:both on the "tbody" div is causing this, but I
really don't know
So I monkeyed up a TABLE by hand and found all of the .offset() and
related functions appear to be giving real results, I just can't quite
connect the dots on how to put it all together.
FWIW, the only reason I used the entire simulated TABLE was because IE
7 does not support onclick() on a TR. But I can just as well put the
onclick on TD elements and get where I need to go using a TABLE, if
only I could connect the dots on the scrolling stuff.
I'm not sure what browsers you're targeting, but if IE6 was one you
were having problems with, this is why.
-Dan
--
Kenneth Downs
Secure Data Software, Inc.
www.secdat.com <http://www.secdat.com> www.andromeda-project.org
<http://www.andromeda-project.org>
631-689-7200 Fax: 631-689-0527
cell: 631-379-0010
--
Kenneth Downs
Secure Data Software, Inc.
www.secdat.com www.andromeda-project.org
631-689-7200 Fax: 631-689-0527
cell: 631-379-0010
