clear preview bar and fix visibility

openlp/core/ui/slidecontroller.py

@@ -1386,12 +1386,14 @@ class SlideController(DisplayController, LogMixin, RegistryProperties):
         new_item = Registry().get(self.service_item.name).on_remote_edit(self.service_item.edit_id, True)
         if new_item:
             self.add_service_item(new_item)
-            
+
     def on_clear(self):
         """
         Clear the preview bar.
         """
-        pass
+        self.preview_widget.clear_list()
+        self.toolbar.set_widget_visible(["editSong"], False)
+        self.toolbar.set_widget_visible(["clear"], False)
 
     def on_preview_add_to_service(self):
         """

openlp/core/widgets/views.py

@@ -146,6 +146,14 @@ class ListPreviewWidget(QtWidgets.QTableWidget, RegistryProperties):
         self.screen_ratio = screen_ratio
         self.__recalculate_layout()
 
+    def clear_list(self):
+        """
+        Clear the preview list
+        :return:
+        """
+        self.setRowCount(0)
+        self.clear()
+
     def replace_service_item(self, service_item, width, slide_number):
         """
         Replace the current preview items with the ones in service_item and display the given slide
@@ -156,8 +164,7 @@ class ListPreviewWidget(QtWidgets.QTableWidget, RegistryProperties):
         """
         self.service_item = service_item
         self.setRowCount(0)
-        self.clear()
-        self.setColumnWidth(0, width)
+        self.clear_list()
         row = 0
         text = []
         for frame_number, frame in enumerate(self.service_item.get_frames()):