text: title = 'Pmw.PanedWidget demonstration (pane factory)'
  
  # Import Pmw from this directory tree.
  import sys
  sys.path[:0] = ['../../..']
  
  import tkinter
  import Pmw
  
  class Demo:
      def __init__(self, parent):
          self.paneCount = 0
  
          # Create a "pane factory".
          label = tkinter.Label(parent,
                  pady = 10,
                  text = 'Below is a simple "pane factory".\n' +
                          'Drag the handle on the left\nto create new panes.')
          label.pack()
          self.factory = Pmw.PanedWidget(parent,
                  orient='horizontal',
                  command = self.resize,
                  hull_borderwidth = 1,
                  hull_relief = 'raised',
                  hull_width=300, hull_height=200
                  )
          self.factory.add('starter', size = 0.0)
          self.factory.add('main')
          button = tkinter.Button(self.factory.pane('main'),
                  text = 'Pane\n0')
          button.pack(expand = 1)
          self.factory.pack(expand = 1, fill = 'both')
  
      def resize(self, list):
          # Remove any panes less than 2 pixel wide.
          for i in range(len(list) - 1, 0, -1):
              if list[i] < 2:
                  self.factory.delete(i)
  
          # If the user has dragged the left hand handle, create a new pane.
          if list[0] > 1:
              self.paneCount = self.paneCount + 1
  
              # Add a button to the new pane.
              name = self.factory.panes()[0]
              text = 'Pane\n' + str(self.paneCount)
              button = tkinter.Button(self.factory.pane(name), text = text)
              button.pack(expand = 1)
  
              # Create a new starter pane.
              name = 'Pane ' + str(self.paneCount)
              self.factory.insert(name, size=0.0)
  
  ######################################################################
  
  # Create demo in root window for testing.
  if __name__ == '__main__':
      root = tkinter.Tk()
      Pmw.initialise(root)
      root.title(title)
  
      exitButton = tkinter.Button(root, text = 'Exit', command = root.destroy)
      exitButton.pack(side = 'bottom')
      widget = Demo(root)
      root.mainloop()
  