addRow to empty grid causes error when tabbing to next cell (broken accesibility)

[guest]

Dojo: 1.02 FF (IE?) contact: dave@…

error: this.cell has no properties -- focus.js ln 122

reproduce: run /dojo/dojox/grid/tests/test_mysql_edit.html

1) either just don't worry about the php datasource (we want the grid empty) *or* set it up but change it to return 0 rows

2) click add row

3) the first cell will change to an editor -- enter a number into it and then

4) tab key -- this causes the error, and the next cell's editor does not come up.

Possibly related to this bug? ​http://trac.dojotoolkit.org/ticket/5430

debugging shows indeed, this.cell is not yet set -- maybe this needs to be set in addRow( or start(

* any other actions (such as clicking on another cell) will prevent this from happing as this.cell get's set. But insertRow->edit first cell -> tab to next cell is a very common thing to do.

[benschell]

I'm taking a stab at a whole bunch of Grid bugs. Re-assigning.

[benschell]

This is directly related to #5590 and the fix for it fixes this as well. The problem isn't really related to the grid being empty, just that the focus hasn't been set on the grid at the point at which the tab key has been hit. So, attempting to go to the 'next' cell is invalid since no current cell has been selected.