          logger.trace("Refreshed swapped faces")
  
      def _build_ui(self):
          """ Build the elements for displaying preview images and options panels. """
          container = tk.PanedWindow(self,
                                     sashrelief=tk.RIDGE,
                                     sashwidth=4,
                                     sashpad=8,
                                     orient=tk.VERTICAL)
          container.pack(fill=tk.BOTH, expand=True)
          container.preview_display = self._display
          self._image_canvas = ImagesCanvas(container, self._tk_vars)
          container.add(self._image_canvas, height=400 * get_config().scaling_factor)
  
 
</s> remove         maincontainer = tk.PanedWindow(self,
                                       sashrelief=tk.RIDGE,
                                       sashwidth=4,
                                       sashpad=8,
                                       orient=tk.VERTICAL,
                                       name="pw_main")
 </s> add         maincontainer = ttk.PanedWindow(self,
                                        orient=tk.VERTICAL,
                                        name="pw_main") </s> remove         main = tk.PanedWindow(self,
                              sashrelief=tk.RIDGE,
                              sashwidth=2,
                              sashpad=4,
                              orient=tk.VERTICAL,
                              name="pw_main")
 </s> add         main = ttk.PanedWindow(self,
                               orient=tk.VERTICAL,
                               name="pw_main") </s> remove         topcontainer = tk.PanedWindow(maincontainer,
                                      sashrelief=tk.RIDGE,
                                      sashwidth=4,
                                      sashpad=8,
                                      orient=tk.HORIZONTAL,
                                      name="pw_top")
 </s> add         topcontainer = ttk.PanedWindow(maincontainer,
                                       orient=tk.HORIZONTAL,
                                       name="pw_top") </s> remove         self.objects["container_top"].sash_place(0, width, 1)
        self.objects["container_main"].sash_place(0, 1, height)
 </s> add         self.objects["container_top"].sashpos(0, width)
        self.objects["container_main"].sashpos(0, height) </s> remove         self._containers["main"].sash_place(0, 1, location)
 </s> add         self._containers["main"].sashpos(0, location)
        container = ttk.PanedWindow(self,
                                    orient=tk.VERTICAL)
          logger.trace("Refreshed swapped faces")
  
      def _build_ui(self):
          """ Build the elements for displaying preview images and options panels. """
        container = ttk.PanedWindow(self,
                                    orient=tk.VERTICAL)
        container = ttk.PanedWindow(self,
                                    orient=tk.VERTICAL)
        container = ttk.PanedWindow(self,
                                    orient=tk.VERTICAL)
        container = ttk.PanedWindow(self,
                                    orient=tk.VERTICAL)
        container = ttk.PanedWindow(self,
                                    orient=tk.VERTICAL)
          container.pack(fill=tk.BOTH, expand=True)
          container.preview_display = self._display
          self._image_canvas = ImagesCanvas(container, self._tk_vars)
          container.add(self._image_canvas, height=400 * get_config().scaling_factor)
  
keep keep keep keep replace replace replace replace replace keep keep keep keep keep
 Minor GUI Updates
  - Switch paned window class to ttk
  - Properly pad StatusBar 
tools/preview/preview.py