I would like to be able to have the filter popup for a particular column from an outside source. I also want to be able to track which columns are currently being filtered. Basically what I have is a list of all the columns will be shown to the user and I will tell them whether that column has a filter or not, allow them to delete that filter and also allow them to add a filter to that column. Is it possible to open the filter window from another source? How can I track which columns currently are being filtered?