Handling the select all checkbox in ListGrids

[killfr0g]

We are using the myGrid.addSelectionChangedHandler() to dynamically enable or disable some other components on the page, depending on certain attributes in the selected records of the grid. The problem is when users hit the select all checkbox, this fires the addSelectionChangedHandler for every record, and it is slowing down the grid quite a lot.

Is there a smarter way of handling the select all checkbox? I have thought of using the addHeaderClick event to listen for the checkbox click, but it seems like a hack, and would still require selecting all the records and causing the addSelectionChangedHandler to fire anyway. What I am looking for is some sort of addSelectAllChangedHandler() that wouldn't fire for every record but just fires once.

[Isomorphic]

We have added a 'selectionUpdated' handler to ListGrid. When selecting multiple rows etc this event will fire once only as opposed to firing for every record being selected or deselected.
This will be present in the next nightly build

Thanks
Isomorphic Software