setting columns and query triggers two server requests

[gerpres]

I'm building a file-system grid, where folder contents are displayed using a OnDemandGrid.

each folder may have an own folder-layout.

On dbl-click I
-) set the desired column-layout
-) set the query

this triggers two server-requests, because the grid gets refreshed in _setColumns() and in _setQuery()

how can I prevent this?

[knokit]

I'm in a similar situation.

1 - I'm creating the grid without defining the columns
2 - As soon as the data arrive from the server the columns are defined, according to the received data

The second step triggers one more server-request, which I would like to avoid.