In that case, you can get the filename field values through the
onItemUpdate callback;
from there, you can modify the <img> element by your code.
The StockListDemo, for instance, shows the use of fields that are not associated to cells (see "item_status")
and the dynamical modification of an image filename (though not directly from a field value, in that case).
Note that the filename field cannot be associated with a cell directly,
hence you cannot
define your Table by specifying null as the schema descriptor.
If there are no fields to be associated with cells in your item containing the filename field, you can use a
NonVisualTable.
There are no simple examples showing the NonVisualTable; however, using a NonVisualTable is simpler than using the other kinds of tables.
