ocarina: Added callback methods

I eventually want to remove the event system from libsaria.  My first
step in doing this is to move usage of the event system in Ocarina to
one place.

ocarina/__init__.py

@@ -23,6 +23,7 @@ import window
 import playlist
 import queue
 import library
+import callbacks
 
 libsaria.startup()
 print "Startup took:", uptime()

ocarina/body/footer/__init__.py

@@ -11,6 +11,11 @@ footer.pack_start(hsep, True, True)
 footer.pack_start(tiny.tiny, True, True)
 footer.show()
 
+def on_play():
+	tiny.on_play()
+
+def on_pause():
+	tiny.on_pause()
 
 #import gtk
 #import pango

ocarina/body/footer/tiny.py

@@ -19,7 +19,15 @@ tiny.pack_start(now_playing, True, True)
 add_button( "REWIND", button.rewind_button)
 add_button("FORWARD", button.forward_button)
 add_button(   "PLAY", button.play_button)
-add_button(  "PAUSE", button.pause_button)
+add_button(  "PAUSE", button.pause_button, False)
 add_button(   "STOP", button.stop_button)
 add_button(   "NEXT", button.next_button)
 tiny.show()
+
+def on_play():
+	PLAY.hide()
+	PAUSE.show()
+
+def on_pause():
+	PLAY.show()
+	PAUSE.hide()

ocarina/callbacks.py

@@ -0,0 +1,14 @@
+# Bryan Schumaker (4 / 20 / 2011)
+
+import libsaria
+from ocarina.body import footer
+
+invite = libsaria.event.invite
+
+def on_play(*args):
+	footer.on_play()
+invite("POSTPLAY", on_play)
+
+def on_pause(*args):
+	footer.on_pause()
+invite("POSTPAUSE", on_pause)