how to move tab indexes between widget columns only?

I am working on Extjs 5 widget columns. How can i move the focus on tab press to next widget column? i have two widget columns in my gridview and each contains a textfield. keyup event is working fine. i want to move the focus to next widget column's textfield of same row on keyup event.

onMytextfieldKeyup: function(textfield, e, eOpts) {

//what to do

}

how to move tab indexes between widget columns only?