code: def load(self, slide):
          
          self._direction = getattr(QtGui.QBoxLayout,
                                    slide.attributes().get('direction', 'TopToBottom'),
                                    QtGui.QBoxLayout.TopToBottom)
          
          for item in slide.items():
              graphic = self.addGraphic(item.attributes().get('type', 'basic'))
              if graphic is not None:
                  graphic.load(item)
docs: Loads the inputed slide to the scene.
          
          :param      slide | <XWalkthroughSlide>