[Seaside] Re: Generating an callback URL for third-party use

[Bob Arning]

Well, as for using a single callback to cover lots of click targets, I 
use something like this

--- a single onClick: for the table---
     html table
         onClick: (
             html jQuery ajax
             callback: [ :value |
                 selIndex _ myNums findFirst: [ :each | each asString = 
value].
             ]
             value: ((html jQuery: '.',id1) filter: 
'return(bobclicktest(this))' asFunction) first html;
...

--- each cell in table that you want to be clickable has the class id1 ---
             html tableRow: [
                 myNums do: [ :e |
                     html tableData
                         class: id1;
...

--- and bobclicktest checks if the event occurred in a particular element---
function bobclicktest(target) {
     return(
         ($(target).offset().top < window.event.pageY)
         && ($(target).offset().top + $(target).height() > 
window.event.pageY)
         && ($(target).offset().left < window.event.pageX)
         && ($(target).offset().left + $(target).width() > 
window.event.pageX)
     )
}
On 5/27/14 8:25 PM, Esteban A. Maringolo wrote:
> Additionally to this, is it possible to pass an argument to such callback?
>
> I'm dealing with a data table on the browser and want to show details
> of the selected item once clicked. Instead of creating hundreds of
> callbacks (one per row), I'd like to pass an identifier of such item
> to the callback, in order to be able to retrieve it from the
> datasource. Is it possible?
>
> Is there a better way to register a callback that does exactly the same?
>
> something to replace this:
> collection do: [:each | html anchor callback: [self edit: each]; with: 'Edit' ]
>
> Into a reutilizable callback with an added parameter.
>
> I looked into the WAListTag class and it seems there is no other way
> other than creating a single callback per item.
> Maybe it is cheap in terms of memory and I worrying about an non
> existing problem. But there should be other way.
>
> Regards!
>
> Esteban A. Maringolo
>
>
> 2014-05-27 19:46 GMT-03:00 Esteban A. Maringolo <emaringolo at gmail.com>:
>> I'm struggling to find a clean way of generating an url to be used for
>> external reference from a javascript library/plugin, such as
>> crossfilter or DataTables.
>>
>> E.g the constructor configuration object has a dataUrl parameter,
>> which will be used by the plugin to retrieve the data.
>>
>> $('element').plugin({dataUrl: "..."});
>>
>> I can generate the expression to retrieve it from anywhere, but what I
>> want is to associate an url with a callback that will answer the data
>> requested.
>>
>> Today I'm assigning results to a local variable using a predefined
>> callback function, and then initializing my data dependent function
>> assuming there is going to be data in that variable.
>>
>> Ej:
>> html document addLoadScript: (
>>    ((html jQuery getJson
>>       json: [ :json | self renderItemsOnJson: json ];
>>       onSuccess: (JSStream on: 'myCallbackFunction(arguments[0]);')
>> asFunction) asFunction assignTo: 'loadCrossfilterData')).
>>
>> html document addLoadScript: (JSStream on: 'loadCrossfilterData()').
>>
>> I want some way to create a url callback in the way of:
>>
>> callbackUrl :=  html magicalCallbackRegister: [ :json | self
>> renderItemsOnJson: json ]. "answers a url"
>>
>> JSStream on: '$(''#element'').plugin({dataUrl:"', callbackUrl, '"})'.
>>
>> which once rendered as JS would be:
>>
>> $('#element').plugin({dataUrl:"/app/_s=...&_k=...&n"});
>>
>> I know this must be possible, because Seaside does it for all the
>> callbacks, but I don't know how to create a simple callback and then
>> get it's url to pass it around.
>>
>> I hope all I wrote is intelligible. Otherwise I can rephrase it in
>> other unintelligible way. :)
>>
>> Esteban A. Maringolo
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