code: def set_dialog_position(self):
          
          parent = self.parent()
          geo = parent.geometry()
          width = self.list.width()  # This has been set in setup
          left = parent.geometry().width()/2 - width/2
          # Note: the +1 pixel on the top makes it look better
          if isinstance(parent, QMainWindow):
              top = (parent.toolbars_menu.geometry().height() +
                     parent.menuBar().geometry().height() + 1)
          else:
              top = self.plugins_tabs[0][0].tabBar().geometry().height() + 1
  
          while parent:
              geo = parent.geometry()
              top += geo.top()
              left += geo.left()
              parent = parent.parent()
  
          self.move(left, top)
docs: Positions the file switcher dialog.