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Seaside: Jquery cascade messages

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Bart Gauquie

Seaside: Jquery cascade messages

Dear list,

I'm stuck at trying to do a cascade of messages on a jquery instance:
I want to do something like this:

$('<li id="newhere"><input type="checkbox" /><span class="listTitle">Im new here</span><ul></ul></li>')

  .hide().prependTo('#container').slideDown("slow");


so some text, hide it, prepend to some container using some effect.


what I've already got is:

(html unorderedList)
   id: 'tweets';
   script:
	((html jQuery ajax script: [ :s | s << (s jQuery html:  [ :r | self renderTweetsOn: r ]) prependTo: (s jQuery id: #tweets)];

	interval: 10 seconds));
   with: [ self renderTweetsOn: html ]]

which just prepends without the effect.

If I update this to: 
	((html jQuery ajax script: [ :s | s << (s jQuery html:  [ :r | self renderTweetsOn: r ]) hide; prependTo: (s jQuery id: #tweets)]; slideDown: 'slow';


it fails with error:

that JSScript>>prependTo: does not exist.
meaning that the hide message send returned a JSScript object instead of a JQueryInstance (which is what I expected to happen).

Any way to solve this?


Thanks for any pointers.

Kind Regards,

Bart

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Johan Brichau-2

Re: Seaside: Jquery cascade messages

Hi Bart,

The #prependTo: message is sent to 's' in the cascade. I think you mean this:

html jQuery ajax script: [ :s | s << ((((s jQuery html: [ :r | self renderTweetsOn: r ]) hide prependTo: (s jQuery id: #tweets)) slideDown: 'slow')];

also watch out with the following pattern:

s << html jQuery keyword: #something

I have gotten burned by "forgetting" that binary messages are evaluated before keyword messages. The correct form is:

s << (html jQuery keyword: #something)

The strange thing is that it often works without the parentheses, but might go completely wrong when you concatenate the scripts (been there, done that :-).

cheers
Johan

On 03 Nov 2010, at 20:09, Bart Gauquie wrote:

> If I update this to:
> ((html jQuery ajax script: [ :s | s << (s jQuery html: [ :r | self renderTweetsOn: r ]) hide; prependTo: (s jQuery id: #tweets)]; slideDown: 'slow';
>
>
> it fails with error:
>
> that JSScript>>prependTo: does not exist.
> meaning that the hide message send returned a JSScript object instead of a JQueryInstance (which is what I expected to happen).
>
> Any way to solve this?

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Bart Gauquie

Re: Seaside: Jquery cascade messages

Thanks very much for this pointer.

It works if I do:
(((s jQuery html: [ :r | self renderTweetsOn: r ]) hide) prependTo: (s jQuery id: #tweets)) slideDown: 'slow'

if I leave the () out around hide, prependTo: , slideDown: then smalltalk says to me that prependTo: slideDown: message does not exist...

Kind Regards,

Bart

On Wed, Nov 3, 2010 at 8:26 PM, Johan Brichau <[hidden email]> wrote:

Hi Bart,

The #prependTo: message is sent to 's' in the cascade. I think you mean this:

html jQuery ajax script: [ :s | s << ((((s jQuery html: [ :r | self renderTweetsOn: r ]) hide prependTo: (s jQuery id: #tweets)) slideDown: 'slow')];

also watch out with the following pattern:

s << html jQuery keyword: #something

I have gotten burned by "forgetting" that binary messages are evaluated before keyword messages. The correct form is:

s << (html jQuery keyword: #something)

The strange thing is that it often works without the parentheses, but might go completely wrong when you concatenate the scripts (been there, done that :-).

cheers
Johan

On 03 Nov 2010, at 20:09, Bart Gauquie wrote:

> If I update this to:
> ((html jQuery ajax script: [ :s | s << (s jQuery html: [ :r | self renderTweetsOn: r ]) hide; prependTo: (s jQuery id: #tweets)]; slideDown: 'slow';
>
>
> it fails with error:
>
> that JSScript>>prependTo: does not exist.
> meaning that the hide message send returned a JSScript object instead of a JQueryInstance (which is what I expected to happen).
>
> Any way to solve this?

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