Re: [xmlvm-users] selectors and xmlvm

[Wolfgang K. <wol...@xm...>]

I guess you basically understand how we map the Cocoa API to the Java
version ;-) So probably your question is about the selector argument of
the call you pointed us to.

Basically we decided to map this kind of API to a strongly typed
interface. For the implementation that means

    * we define an interface which specifies a callback method
    * so our API's version of the method you mentioned does not have the
      selector parameter
    * our Objective C implementation would pass
      action:@selector(<callbackMethod>) to initWithBarButtonSystemItem

As an example have a look at the already existing method
UIControl.addTarget in the following files: UIControl.java,
UIControlDelegate.java and org_xmlvm_iphone_UIControl.m

If this doesn't help please let me know.

-- Wolfgang


Panayotis Katsaloulis wrote:
> Here is another question ;-)
> I'm sure you'll get sick of me :P
>
> This time has to do with selectors.
> I am not familiar with the low level details of the conversion of java  
> bytecode to XML. I hope the answer to this question is not obvious!
>
> How are selectors actually handled by this system? How do you think  
> they can be emulated in the native part?
>
> Let's take this example found here:
>
> http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UIBarButtonItem_Class/Reference/Reference.html#/ 
> /apple_ref/occ/instm/UIBarButtonItem/ 
> initWithBarButtonSystemItem:target:action:
>
> How do you propose to implement this in java and native objective c?
>
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