Bumping this since I have the same problem.
Trying to use select in field to show the user a detailed view of events in the selected time span but if there are no matching events the time span is cleared.
No replies since 2010 is not very encouraging, hope someone knows how this should be done.
- EDIT -
Worked around my problems by showing the details in a Straight Table Chart with a calculated dimension doing the filtering using a couple of variables.