I am using a command pattern, so any changes to object state need to happen within a command execution. A normal itemeditor in a DataGrid would just make its changes on the underlying bound object, but I need to intercept that change and make it use a command.
I'm pretty new to flex, so I'm looking for ideas of how to implement this. A basic example is that I have an object with a "date" field. In the datagrid I am using a flex "DateField" component as the itemeditor. When I select a new date, I don't want it to update the datasource, I want it to call a different method where I can access the newly selected value and pass it to a command to execute. Any tips would be greatly appreciated. Thanks in advance.
Use the itemEditBegin and/or itemEditEnd events on the DataGrid and build your command in the handler. This page has a few examples of capturing the edit operation with those events.