flex datagrid columns drag -

i have data grid users can drag columns , reposition them. there strange requirement columns should not draged left of other column.

eg, assume columns : name, price , start date, end date,

the end date should not dragged , placed before start date. i.e. user can have

• start date, price , name , end date.
• name, start date, price , end date.

but @ no point can end date appear before start date.

is there way flex? there way know user trying drop column , show error message ?

the solution involves work around.

• first use advanced data grid instead of data grid.
• then create column group , add start date , end date columns it.
• then set childrendragenabled="false" in column group.
• thats work around. sample code below.

solution (notice childrendragenabled="false"):

<mx:advanceddatagridcolumngroup childrendragenabled="false">     <mx:advanceddatagridcolumn datafield="startdate" />     <mx:advanceddatagridcolumn datafield="enddate" /> </mx:advanceddatagridcolumngroup>