Hello Jorge,
Thanks for using syncfusion products.
We have analyzed your requirements and this can be achieved by "CellEditTemplate".
We have prepared a sample based on this you can find the sample under the following location.
Sample:
http://www.syncfusion.com/uploads/redirect.aspx?&team=support&file=EmployeeTreeDemo64388393.zipPlease let us know if this helps.
Regards,
Ramesh