libsaria: Get artwork when songs are loaded

I may change this to something that has to be requested by the front
end, rather than always fetching it.  We'll see.

libsaria/callbacks.py

@@ -1,5 +1,7 @@
 # Bryan Schumaker (4 / 30 / 2011)
 
+import libsaria
+
 def null_cb(*args):
 	pass
 
@@ -14,6 +16,7 @@ def pause():
 on_load = null_cb
 def load_file(file):
 	on_load(file)
+	libsaria.path.lastfm.get_artwork(file)
 
 on_like = null_cb
 def like_song(like):
@@ -22,3 +25,7 @@ def like_song(like):
 on_set_volume = null_cb
 def set_volume(prcnt):
 	on_set_volume(prcnt)
+
+on_get_art = null_cb
+def get_art(file, id):
+	on_get_art(file, id)

libsaria/path/lastfm.py

@@ -4,6 +4,8 @@ import libsaria
 from libsaria import sources
 from libsaria import web
 from libsaria import xm
+from libsaria import callbacks
+from libsaria import threads
 
 file_id   = libsaria.path.file_id
 cache     = libsaria.cache
@@ -89,8 +91,10 @@ def get_artwork_id(id):
 	artist, album = sources.get_attrs("artist", "album")
 	return get_artwork_tags(artist, album)
 
-def get_artwork(filepath):
+def get_artwork_bg(file):
 	id = sources.get_attrs("id")
 	file = get_artwork_id(id)
-	libsaria.event.start("POSTGETART", file, id)
-libsaria.event.invite("POSTLOAD", get_artwork, True)
+	callbacks.get_art(file, id)
+
+def get_artwork(file):
+	threads.background(get_artwork_bg, file)

libsaria/threads.py

@@ -15,9 +15,7 @@ class BG_Thread(Thread):
 		self.func = func
 		self.args = args
 	def run(self):
-		print "running func %s with args %s" % (self.func, self.args)
 		self.func(*self.args)
-		print "exiting func %s" % self.func
 
 
 def background(func, *args):

ocarina/__init__.py

@@ -25,7 +25,7 @@ import queue
 import library
 import callbacks
 
-callbacks.on_getart("images/ocarina.png", 0)
+callbacks.on_get_art("images/ocarina.png", 0)
 libsaria.startup()
 print "Startup took:", uptime()
 gtk.main()

ocarina/callbacks.py

@@ -28,12 +28,12 @@ def on_like(like):
 	footer.on_like(like)
 callbacks.on_like = on_like
 
-def on_getart(path, id):
+def on_get_art(path, id):
 	cur_id = libsaria.sources.get_attrs("id")
 	if id != cur_id:
 		path = "images/ocarina.png"
 	footer.set_art(path)
-invite("POSTGETART", on_getart)
+callbacks.on_get_art = on_get_art
 
 def on_load_playlist(*args):
 	playlist.refresh()