Datatable: not all cells editable

[ray007]

I have a datatable, which is sometimes only sparsely populated.
Most cells containing data should be editable, some of them have readonly content, some are and need to stay empty.

I think the way to go would be a canEditCell(data, field, index, event) callback to configure for the datatable.

It would also be helpful, if editing didn't start on the first click.
Click to select cell, maybe use cursor keys to navigate, another click or Enter to start editing.
Click & navigate with keys may be another discussion...