core,mpd: Trigger tracklist_changed() instead of playlist_changed() on tracklist change

docs/changes.rst

@@ -116,6 +116,11 @@ backends:
   This makes it easier to start playing one of the tracks that was just
   appended to the tracklist.
 
+- When the tracklist is changed, we now trigger the new
+  :meth:`mopidy.core.CoreListener.tracklist_changed` event. Previously we
+  triggered :meth:`mopidy.core.CoreListener.playlist_changed`, which is
+  intended for stored playlists, not the tracklist.
+
 **Bug fixes**
 
 - :issue:`218`: The MPD commands ``listplaylist`` and ``listplaylistinfo`` now

mopidy/core/tracklist.py

@@ -58,7 +58,7 @@ class TracklistController(object):
     def version(self, version):
         self._version = version
         self.core.playback.on_tracklist_change()
-        self._trigger_playlist_changed()
+        self._trigger_tracklist_changed()
 
     def add(self, track, at_position=None, increase_version=True):
         """
@@ -240,6 +240,6 @@ class TracklistController(object):
         """
         return [copy(tl_track) for tl_track in self._tl_tracks[start:end]]
 
-    def _trigger_playlist_changed(self):
-        logger.debug('Triggering playlist changed event')
-        listener.CoreListener.send('playlist_changed')
+    def _trigger_tracklist_changed(self):
+        logger.debug('Triggering event: tracklist_changed()')
+        listener.CoreListener.send('tracklist_changed')

mopidy/frontends/mpd/actor.py

@@ -43,7 +43,7 @@ class MpdFrontend(pykka.ThreadingActor, CoreListener):
     def playback_state_changed(self, old_state, new_state):
         self.send_idle('player')
 
-    def playlist_changed(self):
+    def tracklist_changed(self):
         self.send_idle('playlist')
 
     def options_changed(self):