...

src/calibre/gui2/cover_flow.py

@@ -322,9 +322,6 @@ class CoverFlowMixin:
 
     disable_cover_browser_refresh = False
 
-    def __init__(self, *args, **kwargs):
-        pass
-
     def one_auto_scroll(self):
         cb_visible = self.cover_flow is not None and self.cb_splitter.button.isChecked()
         if cb_visible:
@@ -347,10 +344,11 @@ class CoverFlowMixin:
             self.auto_scroll_timer.stop()
             self.toggle_auto_scroll()
 
-    def init_cover_flow_mixin(self):
+    def __init__(self, *a, **kw):
         self.cf_last_updated_at = None
         self.cover_flow_syncing_enabled = False
         self.cover_flow_sync_flag = True
+        self.separate_cover_browser = config['separate_cover_flow']
         self.cover_flow = CoverFlow(parent=self)
         self.cover_flow.currentChanged.connect(self.sync_listview_to_cf)
         self.cover_flow.context_menu_requested.connect(self.cf_context_menu_requested)
@@ -359,7 +357,7 @@ class CoverFlowMixin:
         self.cover_flow.setImages(self.db_images)
         self.cover_flow.itemActivated.connect(self.iactions['View'].view_specific_book)
         self.update_cover_flow_subtitle_font()
-        if config['separate_cover_flow']:
+        if self.separate_cover_browser:
             self.separate_cover_browser = True
             self.cb_splitter.button.clicked.connect(self.toggle_cover_browser)
             self.cb_splitter.button.set_state_to_show()

src/calibre/gui2/ui.py

@@ -373,7 +373,7 @@ class Main(MainWindow, MainWindowMixin, DeviceMixin, EmailMixin,  # {{{
 
         # ########################## Cover Flow ################################
 
-        self.init_cover_flow_mixin()
+        CoverFlowMixin.__init__(self)
 
         self._calculated_available_height = min(max_available_height()-15,
                 self.height())