SMART datagrid v.1 > Classes > DataColumn
Callback function which returns the value used as a default value of column when add the row.
If set this property, DataField.defaultValue, defaultValue, defaultExpression will be ignored.
Like defaultExpression, it will be used when you need to dynamically specify the default value.
Defaults to null.
column.setDefaultCallback(function (column) {
return $('#default').val();
});