How to detect grid filter change

[ambruslaco]

Hi,
how can I detect, that specific grid filter has changed/activated/deactivated. I know, there is on FilterChange event of Store, but I want to check only specific filters.

There have been Update/Activate/Deactivate events on filter in Ext.NET 1.6. Is there any alternative in Ext.NET 3?

Thanks.

Laco