Re: New tutorial: How to create a client-server application with qooxdoo, qcl and QxTransformer

Martin Wittemann wrote:

Hi,

thats good to hear that the data binding layer helped you implementing  
your qcl. Your proposal sound interesting. Do you think of something  
like:

a.bind(b) === b.observe(a)

Greetings,
Martin

Am 10.07.2009 um 13:40 schrieb panyasan:
> And one proposal for the
> databinding API: it seems to make sense to me to add an observe()  
> method
> that is the exact opposite of bind() just like in the qcl xml  
> markup. It
> would be nothing but syntactic sugar but add readability to the  
> qooxdoo
> code.

Yes, exactly. There is a technology in XUL that is related : broadcasters and observers

     https://developer.mozilla.org/En/XUL_Tutorial/Broadcasters_and_Observers

although the implementation differs from qcl.

The syntax could be

    a.bind("property1",b,"property2") === b.observe("property2",a,"property1")

or one could even make the third argument optional if  the properties are equal:

    a.bind("enabled",b) === b.observe("enabled",a);

I find it a bit easier to read the code thinking along the lines of objects which "bind" other objects (active) and objects which "observe" other objects (passive).

Thanks, C.