gmane.comp.lang.smalltalk.squeak.seaside

General subclassing question with regards to callbacks...

Hi all...

I'm stumped once again -- it's probably just another ST thing that is  
throwing me for a loop..
Anyway, I've got a generic 'edit/add' widget that shows a list of  
records and then depending
on the personality selected (by the parent menu), it invokes either  
the vanilla 'add' class
to draw the form for a new record OR we render the 'editSelector'  
class who squirrels away the 'clickBlock'
for later (in case the user clicks/selects a particular user).  So, my  
initialize method and friends for the
EditSelector class looks like :

EditSelector>>initialize
	super initialize.
	userSelector := Admin_User_RecordSelector on: self.
	userEditor   := Admin_User_EditExecutor on: self.
	self userSelector clickBlock: [ : each |
		self userEditor user: each.
		self call: self userEditor.
	].

EditSelector>>renderContentOn:  html
	html render: userSelector.

While the above 'clickBlock' is valid, how its used elsewhere is not.  
See use of onClick:
below and above.. I would like to be able to determine once the user  
presses on

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Lukas Renggli | 11 Nov 10:45

Re: General subclassing question with regards to callbacks...

>        "Override the onClick: method to do what we want..."
>        html tableRow id: 'row' , index asString;
>                class:  (self classForRowNumber: index);
>                script: (self componentScriptOn: index);
>                 onClick: [ self clickBlock ];
>                with: [columns
>                                do: [:ea | self

#onClick: expects a Javascript string or object. #onClick is a HTML
event attribute. You need to wrap the contents of your cells into an
anchor that uses the block as a #callback:, or restort to JavaScript
(AJAX).

Cheers,
Lukas

--

-- 
Lukas Renggli
http://www.lukas-renggli.ch

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Richard E. Flower | 11 Nov 16:17

Re: General subclassing question with regards to callbacks...

Thanks Lukas.. I'll look into doing that.. I figured it was something  
stupid I was overlooking!
Too much late night coding!

-- Rick

On Nov 11, 2008, at 1:45 AM, Lukas Renggli wrote:

>>       "Override the onClick: method to do what we want..."
>>       html tableRow id: 'row' , index asString;
>>               class:  (self classForRowNumber: index);
>>               script: (self componentScriptOn: index);
>>                onClick: [ self clickBlock ];
>>               with: [columns
>>                               do: [:ea | self
>
> #onClick: expects a Javascript string or object. #onClick is a HTML
> event attribute. You need to wrap the contents of your cells into an
> anchor that uses the block as a #callback:, or restort to JavaScript
> (AJAX).
>
> Cheers,
> Lukas
>
> -- 
> Lukas Renggli
> http://www.lukas-renggli.ch
> _______________________________________________
> seaside mailing list
> seaside <at> lists.squeakfoundation.org

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Richard E. Flower | 12 Nov 08:03

Re: General subclassing question with regards to callbacks...

Lukas et-al,

I changed the code mentioned below to look like that below.. However,  
the anchors do NOT show up within the table
at all -- they're outside the table in a different DIV.. Any ideas  
why?  It doesn't seem to make sense to me anyway.
I tried some other variations and got the same result..  Any ideas?

I've also included some generated XHTML output for reference..

renderRowNumber: index item: row on: html
	| rowstr |

	rowstr := 'row' , index asString.

	"Override the onClick: method to do what we want..."
	html tableRow id: rowstr;
		class:  (self classForRowNumber: index);
		script: (self componentScriptOn: index);
		with: [
				html anchor onClick: (html updater id: rowstr; callback: [:r |
					self renderCompOn: r]); with: 'fooBar'.
				columns do: [:ea | self renderColumn: ea row: row on: html].
			]

<a href="javascript:void(0)" onclick="new Ajax.Updater('row1','http://localhost/seaside/foo' 
,{'evalScripts':true,'parameters': 
['_s=WtzsCxCrreiqkTeX','_k=UIrMuNmm','10'].join('&')})">fooBar</a>
<a href="javascript:void(0)" onclick="new Ajax.Updater('row2','http://localhost/seaside/foo' 
,{'evalScripts':true,'parameters':

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Lukas Renggli | 12 Nov 08:38

Re: General subclassing question with regards to callbacks...

>        "Override the onClick: method to do what we want..."
>        html tableRow id: rowstr;
>                class:  (self classForRowNumber: index);
>                script: (self componentScriptOn: index);
>                with: [
>                                html anchor onClick: (html updater id:
> rowstr; callback: [:r |
>                                        self renderCompOn: r]); with:
> 'fooBar'.
>                                columns do: [:ea | self renderColumn: ea row:
> row on: html].
>                        ]

You can't put an anchor tag in-between table rows and table cells.
Tables have a very strict nesting policy (see
http://www.w3.org/TR/REC-html40/struct/tables.html). A minimal valid
HTML table looks like this:

#table
     #tableBody (exactly one)
          #tableRow (one or more)
                #tableData or #tableHeading (one or more)

Actually there are a couple of more things to consider, but that is the basics.

Note that the #onClick: Javascript event you can define on any DOM
node. Only if you want to use a traditional #callback: you need to use
an anchor.

Lukas

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Richard E. Flower | 12 Nov 16:25

Re: General subclassing question with regards to callbacks...

Thanks.. I guess I need to think about it a bit more before it jells  
in my head..

On Nov 11, 2008, at 11:38 PM, Lukas Renggli wrote:

>>       "Override the onClick: method to do what we want..."
>>       html tableRow id: rowstr;
>>               class:  (self classForRowNumber: index);
>>               script: (self componentScriptOn: index);
>>               with: [
>>                               html anchor onClick: (html updater id:
>> rowstr; callback: [:r |
>>                                       self renderCompOn: r]); with:
>> 'fooBar'.
>>                               columns do: [:ea | self renderColumn:  
>> ea row:
>> row on: html].
>>                       ]
>
> You can't put an anchor tag in-between table rows and table cells.
> Tables have a very strict nesting policy (see
> http://www.w3.org/TR/REC-html40/struct/tables.html). A minimal valid
> HTML table looks like this:
>
> #table
>     #tableBody (exactly one)
>          #tableRow (one or more)
>                #tableData or #tableHeading (one or more)
>
> Actually there are a couple of more things to consider, but that is

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Boris Popov | 12 Nov 16:42

RE: General subclassing question with regards tocallbacks...

Lukas,

I don't mean to nitpick, but you can have more than one body in a table,
one for each row group.

Cheers,

-Boris

-- 
+1.604.689.0322
DeepCove Labs Ltd.
4th floor 595 Howe Street
Vancouver, Canada V6C 2T5
http://tinyurl.com/r7uw4

boris <at> deepcovelabs.com

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-----Original Message-----
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Rick Flower | 12 Nov 18:58

RE: General subclassing question with regards tocallbacks...

Thanks for the comment Boris.. In a nutshell all I want to be able to do
is to have a table of names (or whatever) and be able to click anywhere on
that row and have a callback (or block or ??) get rendered that can work
on the 'selected row'..  I've got the code that changes the coloring when
you hover over a row but the callback/block processing is what's getting
me stumped.. Anyway, I'll continue looking at this some more this evening.
Thanks for the insight..

On Wed, November 12, 2008 7:42 am, Boris Popov wrote:
> Lukas,
>
> I don't mean to nitpick, but you can have more than one body in a table,
> one for each row group.
>
> Cheers,
>
> -Boris
>
> --
> +1.604.689.0322
> DeepCove Labs Ltd.
> 4th floor 595 Howe Street
> Vancouver, Canada V6C 2T5
> http://tinyurl.com/r7uw4
>
> boris <at> deepcovelabs.com
>
> CONFIDENTIALITY NOTICE
>
> This email is intended only for the persons named in the message header.

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