I don't know if I understood your suggestion, here is an obstacle. I can use GridLayout(3,4) setting the middle column to 2x the width of the side-columns, and then I create another container at the first and last cells of the middle column setting GridLayout(2,1) to it too. But how can I measure the width of the side-columns?
Well, modifying the source code is always an option, but I prefer first to report problems or difficulties so that the framework can be improved. One suggestion, for example, is to implement the applicability of the style-property span(col,row) to the GridLayout (why just TableLayout?).
Regards


