The Recoll KIO slave allows performing a Recoll search by entering an appropriate URL in a KDE open dialog, or a Dolphin URL. The results are displayed as directory entries.
The instructions for building this module are located in the source
tree. See: kde/kio/recoll/00README.txt
. Some Linux distributions do
package the kio-recoll module, so check before diving into the build process, maybe it's
already out there ready for one-click installation.