Thanks but I already saw that one. The problem is you have to pass it the line number on which you want information. But that is exactly what I want .. i.e The line number.
I found my answer. Just thought I'd share it with you guys.
The SuperText widget uses the Text widget as a superclass so all of the functions of the Text Widget apply here.
The Text widget has a function that will return the current line and column in the line.col format.
$text_widget->index( 'insert ') should do the trick. Thanks again for your help stefan_k.