Hi i'm trying to do the same thing here, but no form of grid.getSelectionModel().getSelections(); returns anything at all.
I've tried:
grid.getSelectionModel().getSelections();
grid.getSelectionModel().getSelectedRows();
grid.store.getSelectedRows();
grid.store.getSelectionModel().getSelectedRows();
grid.store.getSelectionModel().getSelections();
and like 6 other method calls but nothing is recognized. For reference, i can set a variable to grid.store.getUpdatedRows() and return a result set, but its blank because there are no updated rows. I'm just trying to get the selected rows and am unable to.