sidebar: Change the currently displayed playlist

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

sidebar/__init__.py

@@ -3,8 +3,17 @@ from gi.repository import Gtk
 from . import stack
 
 class Sidebar(Gtk.Box):
-    def __init__(self):
+    def __init__(self, panel):
         Gtk.Box.__init__(self)
+        self.panel = panel
         switcher = stack.Switcher()
+
         self.append(switcher)
         self.append(stack.Box(switcher.get_stack()))
+
+        stak = switcher.get_stack()
+        stak.connect("playlist-changed", self.playlist_changed)
+        panel.set_playlist(stak.get_visible_child().get_selected_playlist())
+
+    def playlist_changed(self, stack, plist):
+        self.panel.set_playlist(plist)

sidebar/test_sidebar.py

@@ -1,14 +1,30 @@
 # Copyright 2021 (c) Anna Schumaker.
+import datetime
+import db
+import playlist
 import sidebar
 import unittest
 from gi.repository import Gtk
 
 class TestSidebar(unittest.TestCase):
     def test_init(self):
-        sbar = sidebar.Sidebar()
+        panel = playlist.Panel()
+        sbar = sidebar.Sidebar(panel)
         self.assertIsInstance(sbar, Gtk.Box)
+        self.assertEqual(sbar.panel, panel)
 
         child = sbar.get_first_child()
         self.assertIsInstance(child, sidebar.stack.Switcher)
         child = child.get_next_sibling()
         self.assertIsInstance(child, sidebar.stack.Box)
+
+    def test_change_playlist(self):
+        artist = db.artist.Table.find("Test Artist", "Test Sort")
+        album = artist.find_album("Test Album", datetime.date(2021, 3, 18))
+        panel = playlist.Panel()
+        sbar = sidebar.Sidebar(panel)
+
+        sbar.playlist_changed(None, artist)
+        self.assertEqual(panel.get_playlist(), artist)
+        sbar.playlist_changed(None, album)
+        self.assertEqual(panel.get_playlist(), album)

ui/pane.py

@@ -7,10 +7,11 @@ from gi.repository import Gtk
 class Pane(Gtk.Paned):
     def __init__(self):
         Gtk.Paned.__init__(self)
+        panel = playlist.Panel()
 
         self.set_shrink_start_child(False)
-        self.set_start_child(sidebar.Sidebar())
-        self.set_end_child(playlist.Panel())
+        self.set_start_child(sidebar.Sidebar(panel))
+        self.set_end_child(panel)
         self.set_vexpand(True)
 
         lib.settings.initialize("sidebar.width", 250)