MythTV/mythtv — pull request #75 by chadparry (2014-06-14 21:17:13+00:00)
Title: Use a separate thread for recursive directory scans

Slideshows can take a long time to start if there are lots of files and directories in the album tree. The solution is to scan the album on a different thread while the slideshow is already running. This makes the `imageview` more complicated, because of the inter-thread coordination. Fortunately the changes can mostly be contained in the `imageview`. The benefits to the user are noticeable.