My business case requires four custom fields which are cascading drop down lists (Country > Region > State / Prov > City. The selection from the 4th dropdown list will result in a value that will be used as the search text. I want to replace the search text box with these four custom fields while leaving all the refiners and search results alone.
Is this possible to do? If so what's the best route? I'm comfortable with creating web parts and custom development if need be.