Maybe it's just Friday brain weariness, but I'm having trouble coming up with a creative solution to this problem.
Let's say I have a filter widget with a unique value filter field (e.g. state) that's filtering the features in a state map layer. Normally, when no filter is set (All is selected in the filter dropdown), all 50 states would be displayed in the map.
Is there a way for *no* features to display when no filter is set? So instead of all 50 states showing until I select a single state, the map will be blank until I select a state?
Put another way, is there an "additive" filter rather than a "subtractive" filter?
