playlist: Give the playlist panel an add_selected_tracks() function

So we can have all the add track functionality in one place that also
allows for keyboard presses to work.

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

playlist/__init__.py

@@ -43,6 +43,12 @@ class Panel(Gtk.Box):
                 for track in self.selected_tracks():
                     playlist.remove_track(track)
                 return True
+        elif name == "f":
+            self.add_selected_tracks(db.user.Table.find("Favorites"))
+            return True
+        elif name == "q":
+            self.add_selected_tracks(db.user.Table.find("Queued Tracks"))
+            return True
         return False
 
     def jump_clicked(self, button):
@@ -52,3 +58,10 @@ class Panel(Gtk.Box):
     def selected_tracks(self):
         for track in self.window.selected_tracks():
             yield track
+
+    def add_selected_tracks(self, plist):
+        for track in self.selected_tracks():
+            plist.add_track(track)
+        if plist == db.user.Table.find("Queued Tracks"):
+            audio.Player.set_playlist(plist)
+        db.sql.commit()

sidebar/__init__.py

@@ -24,8 +24,4 @@ class Sidebar(Gtk.Box):
 
     def add_to_playlist(self, button, playlist):
         if playlist.can_add_remove_tracks():
-            for track in self.panel.selected_tracks():
-                playlist.add_track(track)
-            if playlist == db.user.Table.find("Queued Tracks"):
-                audio.Player.set_playlist(playlist)
-            db.sql.commit()
+            self.panel.add_selected_tracks(playlist)