Waiting message for Store

I have grid and relating store. How to add waiting开发者_如何学运维 message to grid while store update the some record ?

It seems like you're looking for the loadMask property of the GridPanel :

loadMask : Object An Ext.LoadMask config or true to mask the grid while loading. Defaults to false.

So, adding loadMask:true, in your GridPanel config should work.