The Recoll KIO slave allows performing a Recoll search by entering an appropriate URL in a KDE open dialog, or with an HTML-based interface displayed in Konqueror.
The HTML-based interface is similar to the Qt-based interface, but slightly less powerful for now. Its advantage is that you can perform your search while staying fully within the KDE framework: drag and drop from the result list works normally and you have your normal choice of applications for opening files.
The alternative interface uses a directory view of search results. Due to limitations in the current KIO slave interface, it is currently not obviously useful (to me).
The interface is described in more detail inside a help
      file which you can access by entering
      recoll:/ inside the
      konqueror URL line (this works only if the
      recoll KIO slave has been previously installed).
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.
As a sample application, the Recoll KIO slave could allow preparing a set of HTML documents (for example a manual) so that they become their own search interface inside konqueror.
This can be done by either explicitly inserting
      <a href="recoll://..."> links 
      around some document areas, or automatically by adding a
      very small javascript program to the
      documents, like the following example, which would initiate a search by
      double-clicking any term:
<script language="JavaScript">
    function recollsearch() {
        var t = document.getSelection();
        window.location.href = 'recoll://search/query?qtp=a&p=0&q=' +
            encodeURIComponent(t);
    }
</script>
 ....
<body ondblclick="recollsearch()">