+ preload_source_label = Label(settings_frame, text="Preload Source:")
+ preload_source_label.grid(row=settings_row, column=1, sticky=W)
+ self.preload_source = StringVar(self._root, name="preload_source")
+ self.preload_source.set(self.config.default_preload_source)
+ preload_source_menu = OptionMenu(
+ settings_frame, self.preload_source, *self.config.preload_source_types
+ )
+ preload_source_menu.config(width=25)
+ preload_source_menu.grid(
+ row=settings_row, column=2, columnspan=3, sticky=E, pady=5
+ )
+ settings_row += 1
+