[Seaside] Re: Any design pattern for scroll issue when using call/answer?

[Chun, Sungjin]

What I've used for this kind of problem is save the scroll position to  
the cookie(not the
anchor label but the "real scrollbar position" using Javascript).


On Mar 25, 2009, at 6:25 PM, Hilaire Fernandes wrote:

> I try to see the difference facet of the problem regarding mix use of
> composition and the scroll problem. May be my view is partial  
> because I
> don't know much javascript, but here it goes:
>
> So far, I see mainly 3 concomitant issues:
>
> 1. when you call a sub component, the canvas scrolls back to the top
>
> 2. when you return from a sub component, the canvas scrolls back to  
> the
> top
>
> 3. when you click a link with a callback changing the state of the
> canvas, it scrolls back to the top
>
> Regarding the history of the comments in this mailing list, I see the
> problem can be solved using anchor.
>
> But the problem is far to be optimal as it breaks reusability of the
> component.
>
> For issue #1, I try with a special Anchor decoration, with this render
> method:
> renderContentOn: html
> 	html anchor
> 		name: anchor;
> 		script: (SUScript new goto: '#', anchor).	
> 	html text: ''.
> 	self renderOwnerOn: html.
>
> Don't ask me why the html text: '', otherwise the anchor is rendered
> toward the end of the component (is it because the component has the
> Form decoration?).
>
> The decoration does not solve entirely reusability because the #answer
> message in the sub component is out of the reach of the decoration. So
> you still need to subclass component to get the scroll back issue #2
> fixed, for example I sub-class WAChoiceDialog to override method ok:
> ok
> 	self session jumpToAnchor: anchor .
> 	super ok
>
> Not nice
>
>
> For issue #3, it is quite simple:
> html anchor
> 	callback: [attribute pushVersion: 'votre texte'.
> 		self session jumpToAnchor: self hash asString];
> 	with: '( + )'.
>
> Any comments or additional ideas?
>
> Hilaire
>
>
>
> Le mardi 24 mars 2009 à 14:31 +0100, Hilaire Fernandes a écrit :
>> Hello,
>>
>> Are there a well known pattern for seaside to deal with the browser
>> scrolled page when using sub-component and callback?
>
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