playlist: Update the visible and runtime labels

I do this whenever items_changed() is called so it updates whenever we
update the model.

Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

playlist/model.py

@@ -1,4 +1,5 @@
 # Copyright 2021 (c) Anna Schumaker.
+from . import runtime
 from lib import bus
 from gi.repository import GObject, Gio
 
@@ -35,6 +36,11 @@ class TagModel(GObject.GObject, Gio.ListModel):
         if n < len(self.items):
             return self.items[n]
 
+    def items_changed(self, pos, removed, added):
+        super().items_changed(pos, removed, added)
+        runtime.set_runtime(self.tag.runtime)
+        runtime.set_visible_count(len(self.items))
+
     def switch_tag(self, tag):
         removed = self.__unset_tag__()
         added = self.__set_tag__(tag)
@@ -49,7 +55,7 @@ class TagModel(GObject.GObject, Gio.ListModel):
 
     def do_track_removed(self, tag, track, pos):
         self.items.remove(track)
-        return self.items_changed(pos, 1, 0)
+        self.items_changed(pos, 1, 0)
 
     def track_removed(self, tag, track, pos):
         self.bus.board(self.do_track_removed, tag, track, pos)

playlist/test_model.py

@@ -1,5 +1,6 @@
 # Copyright 2021 (c) Anna Schumaker.
 from . import model
+from . import runtime
 from lib import bus
 from lib import fake
 from lib import tag
@@ -39,12 +40,16 @@ class TestTagModel(unittest.TestCase):
         self.assertEqual(m.items, [ track ])
         self.assertEqual(m.get_n_items(), 1)
         self.assertEqual(m.get_item(0), fake.Track(1))
+        self.assertEqual(runtime.Runtime.get_text(), "1 second")
+        self.assertEqual(runtime.Visible.get_text(), "Showing 1 track")
 
         t.remove_track(track)
         m.bus.complete()
         self.assertEqual(m.items, [ ])
         self.assertEqual(m.get_n_items(), 0)
         self.assertIsNone(m.get_item(0))
+        self.assertEqual(runtime.Runtime.get_text(), "0 seconds")
+        self.assertEqual(runtime.Visible.get_text(), "Showing 0 tracks")
 
     def test_tag_model_init_none(self):
         m = model.TagModel()
@@ -59,7 +64,7 @@ class TestTagModel(unittest.TestCase):
         t.add_track(fake.Track(2))
 
         u = tag.Tag("B")
-        u.add_track(fake.Track(3))
+        u.add_track(fake.Track(5))
 
         m = model.TagModel()
         m.connect("items-changed", self.items_changed_cb)
@@ -67,8 +72,12 @@ class TestTagModel(unittest.TestCase):
         m.switch_tag(t)
         self.assertEqual(self.changed, (0, 0, 2))
         self.assertIn(m.track_added, t.TrackAdded.subscribers)
+        self.assertEqual(runtime.Visible.get_text(), "Showing 2 tracks")
+        self.assertEqual(runtime.Runtime.get_text(), "3 seconds")
 
         m.switch_tag(u)
         self.assertEqual(self.changed, (0, 2, 1))
         self.assertIn(m.track_added, u.TrackAdded.subscribers)
         self.assertNotIn(m.track_added, t.TrackAdded.subscribers)
+        self.assertEqual(runtime.Visible.get_text(), "Showing 1 track")
+        self.assertEqual(runtime.Runtime.get_text(), "5 seconds")

playlist/test_runtime.py

@@ -4,6 +4,10 @@ from gi.repository import Gtk
 import unittest
 
 class TestPlaylistRuntime(unittest.TestCase):
+    def setUp(self):
+        runtime.set_runtime(0)
+        runtime.set_visible_count(0)
+
     def test_runtime_init(self):
         self.assertIsInstance(runtime.Runtime, Gtk.Label)
         self.assertIsInstance(runtime.Visible, Gtk.Label)