Android ActivityWindow vs Window

I have a dilema on porting an app from iphone to android (all written in Titanium by the way )

I use to make open another window upon closing another by adding a property to the window that was closing... (as I only have to open another only on some cases...)

The problem is the source that's calling the close event is not the window as in iphone.. it's another object of type ActivityWindow (just sometime though .. didn't figured it out when.. or what..)

so my code is this:

Window.addEventListener('close', function(e) {          
    if (e.source.open_another==true )  {  
        //do something
    }
 }
 
///***************///
 
so in the window
Window.close({animated});

So how can I get to the calling window from ActivityWindow