Getting the selected value from a DateRangeFilter

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Hi
I'm trying to retrieve the (low and high) values selected by an end user 
through the use of a DateRangeFilter.

I have written something like :

DateRangeFilter filter = new DateRangeFilter();
filter.addStateChangeHandler(new StateChangeHandler()
{
    @Override
    public void onStateChange(StateChangeEvent event)
    {
System.out.println("onStateChange >" + 
processFlawDRFilter.getObject().getState().getHighValue());
    }

But it does not work. I see nothing on my console.

Do you know if there is a way to access to such values ?

thank a lot for your help

Original issue reported on code.google.com by [email protected] on 3 Mar 2015 at 5:41