ocarina: Do filtering in the listview

Each source was doing the exact same thing for filtering now that I have
a generic is_visible() function.  There is no need for each source to
implement this.

ocarina/library.py

@@ -23,10 +23,6 @@ def refresh():
 	lib_page.clear()
 	fill_library()
 
-def do_refilter(list, iter):
-	return libsaria.sources.is_visible(list[iter][0])
-lib_page.set_filter_func(do_refilter)
-
 def refilter():
 	lib_page.refilter()
 	set_label_text()

ocarina/playlist.py

@@ -23,10 +23,6 @@ def refresh():
 	playlist_page.clear()
 	fill_playlist()
 
-def do_refilter(list, iter):
-	return libsaria.sources.is_visible(list[iter][0])
-playlist_page.set_filter_func(do_refilter)
-
 def refilter():
 	playlist_page.refilter()
 	playlist_page.goto()

ocarina/queue.py

@@ -30,10 +30,6 @@ def refresh():
 	queue_page.clear()
 	fill_queue()
 
-def do_refilter(list, iter):
-	return libsaria.sources.is_visible(list[iter][0])
-queue_page.set_filter_func(do_refilter)
-
 def refilter():
 	queue_page.refilter()
 	set_label_text()

ocarina/sources/listview.py

@@ -6,6 +6,7 @@ import column
 import libsaria
 
 BUTTON_RIGHT = 3
+is_visible   = libsaria.sources.is_visible
 
 class ListView(gtk.TreeView):
 	def __init__(self):
@@ -31,6 +32,7 @@ class ListView(gtk.TreeView):
 		self.connect("button-release-event", self.button_click)
 		#self.connect("query-tooltip", self.query_tooltip)
 
+		self.set_filter_func(self.song_is_visible)
 		self.insert = self.list.insert
 		self.show()
 
@@ -81,6 +83,9 @@ class ListView(gtk.TreeView):
 		self.selection.selected_foreach(insert_func, res.append)
 		return res
 
+	def song_is_visible(self, list, iter):
+		return is_visible(list[iter][0])
+
 	def set_filter_func(self, func):
 		self.filter_model.set_visible_func(func)