Added framework for Queue

This patch adds the queue as a tab on the main window.  I also added the
libsaria queue functions, but right now the don't do anything.

libsaria/sources/__init__.py

@@ -8,6 +8,7 @@ from libsaria import threads
 
 import library
 import playlist
+import queue
 
 controls = libsaria.controls
 

libsaria/sources/queue.py

@@ -0,0 +1,27 @@
+# Bryan Schumaker (12/12/2010)
+
+import libsaria
+
+library = None
+source  = None
+
+def init():
+	global library
+
+	import library
+	source = libsaria.sources.Source()
+	source.get_attrs  = library.get_attrs
+	source.get_cur_id = get_cur_id
+
+def init_bg(callback):
+	init()
+	callback()
+
+def get_cur_id():
+	return -1
+
+def is_visible():
+	return True
+
+def play_id(id):
+	pass

ocarina.py

@@ -11,6 +11,7 @@ from ocarina import window
 from ocarina import body
 from ocarina import library
 from ocarina import playlist
+from ocarina import queue
 
 width  = libsaria.init_pref("ocarina.window.width", 800)
 height = libsaria.init_pref("ocarina.window.height", 600)
@@ -23,6 +24,7 @@ window.add(body.body)
 
 playlist.init()
 library.init()
+queue.init()
 
 after = now()
 print "Startup took:", after-before

ocarina/queue.py

@@ -0,0 +1,32 @@
+# Bryan Schumaker (12/12/2010)
+
+import ocarina
+from ocarina import body
+from ocarina import source
+import menu
+
+gtk     = ocarina.gtk
+sources = ocarina.libsaria.sources
+queue   = sources.queue
+visible = queue.is_visible
+
+queue_page = source.Source()
+
+def init():
+	body.add_page("Queue", queue_page)
+	sources.init_src(queue.init_bg, filler)
+
+def filler():
+	queue_page.init(filter, is_visible, right_click, queue.play_id, reset)
+
+def filter(text):
+	pass
+
+def is_visible(list, iter):
+	return True
+
+def reset():
+	pass
+
+def right_click(button, time):
+	pass