[scribus] setPageTabOrder not working as expected

[Tan]

Hi

According to JavaScript API Reference and a reasonable guessing, it 
would be possible to assign tab order of fields using:

   for (var i=0; i<this.numPages; i++) {
     this.setPageTabOrder(i,"columns");
   }

however, it complains with "NotAllowedError"

As fields doesn't seem to have a taborder property, i guessed I could 
set z-index based on location (x,y coordinates) and tried the following:

   for (var i=0; i<this.numFields;i++){
     var a=this.getField(this.getNthFieldName(i));
     a.calcOrderIndex=1;
     for (var j=1; j<this.numFields;j++){
       var b=this.getField(this.getNthFieldName(j));
       if(a.rect[2]<b.rect[2]){
         a.calcOrderIndex=a.calcOrderIndex+1;
       }
       if(a.rect[0]<b.rect[0]){
         a.calcOrderIndex=a.calcOrderIndex+1;
       }
     }
     console.println(a.name+"="+a.calcOrderIndex);
   }

but it neither works

So far, manually setting z-index seems to be the only way to set 
taborder propertly.

Shoulnd't setPageTabOrder work? May I fill a bug for that? Isn't 
setPageTabOrder intended for that?

Thanks in advance.