nowplaying: Add the PreferArtistMenu to the ArtistLabel

This menu is used to select between showing the artist or album artist
tag.

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

emmental/nowplaying/label.py

@@ -1,6 +1,7 @@
 # Copyright 2022 (c) Anna Schumaker.
 """A Gtk.Label set up for displaying nowplaying tags."""
 from gi.repository import GObject
+from gi.repository import Gdk
 from gi.repository import Gtk
 from gi.repository import Pango
 
@@ -70,9 +71,37 @@ class ArtistLabel(Label):
     def __init__(self, **kwargs):
         """Initialize the Artist Label."""
         super().__init__(**kwargs)
+        self._menu = PreferArtistMenu()
+        self._popover = Gtk.Popover(child=self._menu)
+        self._clicked = Gtk.GestureClick()
+
+        self.bind_property("prefer-artist", self._menu, "prefer-artist",
+                           GObject.BindingFlags.BIDIRECTIONAL)
+
+        self.add_controller(self._clicked)
+        self._clicked.connect("released", self.__clicked)
+
         self.connect("notify::artist", self.__notify)
         self.connect("notify::album-artist", self.__notify)
         self.connect("notify::prefer-artist", self.__notify)
+        self.connect("notify::size", self.__notify_size)
+
+        rect = Gdk.Rectangle()
+        rect.x, rect.y = (8, 8)
+        self._popover.set_pointing_to(rect)
+        self._popover.set_parent(self)
+
+    def __del__(self) -> None:
+        """Clean up the Artist Label."""
+        self._popover.unparent()
+
+    def __clicked(self, gesture, n_press, x, y) -> None:
+        self._popover.popup()
+
+    def __notify_size(self, label, param) -> None:
+        rect = Gdk.Rectangle()
+        (rect.x, rect.y) = (self.size, self.size)
+        self._popover.set_pointing_to(rect)
 
     def __notify(self, label, param) -> None:
         if self.prefer_artist:

tests/nowplaying/test_label.py

@@ -115,11 +115,39 @@ class TestArtistLabel(unittest.TestCase):
     def test_init(self):
         """Test that the artist label is set up properly."""
         self.assertIsInstance(self.label, emmental.nowplaying.label.Label)
+        self.assertIsInstance(self.label._menu,
+                              emmental.nowplaying.label.PreferArtistMenu)
+        self.assertIsInstance(self.label._clicked, Gtk.GestureClick)
+
         self.assertEqual(self.label.prefix, "by ")
         self.assertEqual(self.label.artist, "")
         self.assertEqual(self.label.album_artist, "")
         self.assertTrue(self.label.prefer_artist)
 
+    def test_popover_menu(self):
+        """Test that the popover menu is wired up properly."""
+        self.assertIsInstance(self.label._popover, Gtk.Popover)
+        self.assertEqual(self.label._popover.get_parent(), self.label)
+        self.assertEqual(self.label._popover.get_child(), self.label._menu)
+
+        self.label.prefer_artist = False
+        self.assertFalse(self.label._menu.prefer_artist)
+        self.label._menu.prefer_artist = True
+        self.assertTrue(self.label.prefer_artist)
+
+    def test_popover_pointing_to(self):
+        """Test that the popover is pointing to the right spot."""
+        (res, rect) = self.label._popover.get_pointing_to()
+        self.assertTrue(res)
+        self.assertEqual((rect.x, rect.y), (8, 8))
+        self.assertEqual((rect.width, rect.height), (1, 1))
+
+        self.label.size = 48
+        (res, rect) = self.label._popover.get_pointing_to()
+        self.assertTrue(res)
+        self.assertEqual((rect.x, rect.y), (48, 48))
+        self.assertEqual((rect.width, rect.height), (1, 1))
+
     def test_prefer_artist(self):
         """Test situations where we want to use the artist property."""
         self.label.prefer_artist = True