public interface BeforeCommitHandler extends com.google.gwt.event.shared.EventHandler
void onBeforeCommit(BeforeCommitEvent event)
This notification occurs before actually committing data to the server. It allows to make changes to the data after user edits, but before it will be sent to server.
BatchUploader.previewShown() docs for details how to
change data in grid and for possibility to interrupt upload process on the server as well.
event- the event