I have a browse screen with a Default filter being applied. There is an instance when this browse screen is opened as a lookup from a specific action and in this case I do not want this filter to be applied. Is there a way to programmatically remove the default filter?
I have programmatically set filters before in the controller for the browse screen based on passed parameters but I cannot figure out how to remove a filter with this approach.
If you want to create a new filter with parameters from scratch, then you need to set proper XML in the filter.setXml(...) method. Take a look at what XML is stored in the database for some existing filter - that will give you an idea how to build such an XML.
If you need to set a value to a condition of existing filter, then maybe this API can help you.