Rails spinoffs - Aug 2005 - Possible to scroll window when user drags a draggable?

It doesn''t seem to be possible, but perhaps somebody knows a trick. I
have some lists that get too long and users can''t drag from list 10,
for example, to list 1. Is there a way to get the browser window to
scroll as they drag the item up?

Thanks!
Tom

On 15/08/05, Tom Wilcoxen <tomwilcoxen@gmail.com>
wrote:
> It doesn''t seem to be possible, but perhaps somebody knows a
trick. I
> have some lists that get too long and users can''t drag from list
10,
> for example, to list 1. Is there a way to get the browser window to
> scroll as they drag the item up?
You can query the mouse position in the viewport and scroll, when you
are at the top/bottom. You could extract the relevant pieces in my
hacked Sortable version at http://test.reasonmaker.com/sort/ (look for
scroll).

Note my caching of the viewport height so I don''t have to query every
time, which is slow. And also the onresize handler so that it gets
updated on window size changes.

Bye,
  Martin

Martin,

Thanks, that''s just what I''m looking for. From looking through
your
code it looks like I''d need the relevant portions from your
dragdrop.js plus your utils.js -- is that correct?

This would be a great addition to Draggables... (hint, hint) :)

Thanks!
Tom

On 8/16/05, Martin Bialasinski <klingeling@gmail.com>
wrote:
> On 15/08/05, Tom Wilcoxen <tomwilcoxen@gmail.com> wrote:
> > It doesn''t seem to be possible, but perhaps somebody knows a
trick. I
> > have some lists that get too long and users can''t drag from
list 10,
> > for example, to list 1. Is there a way to get the browser window to
> > scroll as they drag the item up?
> 
> You can query the mouse position in the viewport and scroll, when you
> are at the top/bottom. You could extract the relevant pieces in my
> hacked Sortable version at http://test.reasonmaker.com/sort/ (look for
> scroll).
> 
> Note my caching of the viewport height so I don''t have to query
every
> time, which is slow. And also the onresize handler so that it gets
> updated on window size changes.
> 
> Bye,
>   Martin
>

On 16/08/05, Tom Wilcoxen <tomwilcoxen@gmail.com> wrote:
> Thanks, that''s just what I''m looking for. 
You are welcome.
> From looking through your
> code it looks like I''d need the relevant portions from your
> dragdrop.js plus your utils.js -- is that correct?
I think you don''t need my additions to utils.js. To speed up
everything for my vertical-only lists, I made functions that only deal
with the Y position, where originally X & Y is used/returned. Just
rewrite my code a bit to use the Y part.
> This would be a great addition to Draggables... (hint, hint) :)
The problem is, I am quite busy currently. And the thing needs some
more work to be of general usefulness. Well, isolate the scroll part,
make it also work for horizontal scrolling (it is analogous really),
make it configurable and submit a patch :-) Better ask Thomas first,
if he would accept it and what his requirements are on this (for
example, with my code, you can scroll past the document length; No
problem for me, but I AFAIR he doesn''t like it that way).

Bye,
  Martin

I think the scrolling effect would be a terrific addition. Very cool,
Martin!

-----Original Message-----
From: rails-spinoffs-bounces@lists.rubyonrails.org
[mailto:rails-spinoffs-bounces@lists.rubyonrails.org] On Behalf Of Tom
Wilcoxen
Sent: Tuesday, August 16, 2005 1:33 PM
To: Martin Bialasinski
Cc: rails-spinoffs@lists.rubyonrails.org
Subject: Re: [Rails-spinoffs] Possible to scroll window when user drags
adraggable?

Martin,

Thanks, that''s just what I''m looking for. From looking through
your
code it looks like I''d need the relevant portions from your
dragdrop.js plus your utils.js -- is that correct?

This would be a great addition to Draggables... (hint, hint) :)

Thanks!
Tom

On 8/16/05, Martin Bialasinski <klingeling@gmail.com>
wrote:
> On 15/08/05, Tom Wilcoxen <tomwilcoxen@gmail.com> wrote:
> > It doesn''t seem to be possible, but perhaps somebody knows a
trick. I
> > have some lists that get too long and users can''t drag from
list 10,
> > for example, to list 1. Is there a way to get the browser window to
> > scroll as they drag the item up?
> 
> You can query the mouse position in the viewport and scroll, when you
> are at the top/bottom. You could extract the relevant pieces in my
> hacked Sortable version at http://test.reasonmaker.com/sort/ (look for
> scroll).
> 
> Note my caching of the viewport height so I don''t have to query
every
> time, which is slow. And also the onresize handler so that it gets
> updated on window size changes.
> 
> Bye,
>   Martin
>
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This would sure be a welcome addition.

What I want to see in an implementation is autoscrolling containers  
(when the CSS says so).
So, it should seek the first parent that is scrollable and use that  
element for scrolling.

Thomas

Am 16.08.2005 um 23:10 schrieb Martin Bialasinski:
>
>> This would be a great addition to Draggables... (hint, hint) :)
>>
>
> The problem is, I am quite busy currently. And the thing needs some
> more work to be of general usefulness. Well, isolate the scroll part,
> make it also work for horizontal scrolling (it is analogous really),
> make it configurable and submit a patch :-) Better ask Thomas first,
> if he would accept it and what his requirements are on this (for
> example, with my code, you can scroll past the document length; No
> problem for me, but I AFAIR he doesn''t like it that way).

I''m swamped this week, but maybe in the next couple I''ll have
a chance
to take a look at it.

Thanks!
Tom

On 8/17/05, Thomas Fuchs <thomas@fesch.at> wrote:
> This would sure be a welcome addition.
> 
> What I want to see in an implementation is autoscrolling containers
> (when the CSS says so).
> So, it should seek the first parent that is scrollable and use that
> element for scrolling.
> 
> Thomas
> 
> Am 16.08.2005 um 23:10 schrieb Martin Bialasinski:
> 
> >
> >> This would be a great addition to Draggables... (hint, hint) :)
> >>
> >
> > The problem is, I am quite busy currently. And the thing needs some
> > more work to be of general usefulness. Well, isolate the scroll part,
> > make it also work for horizontal scrolling (it is analogous really),
> > make it configurable and submit a patch :-) Better ask Thomas first,
> > if he would accept it and what his requirements are on this (for
> > example, with my code, you can scroll past the document length; No
> > problem for me, but I AFAIR he doesn''t like it that way).
>