Button mouse action: mouse in, out and rollover，mouserollover,# Button dem

Button mouse action: mouse in, out and rollover，mouserollover,# Button dem

# Button demonstration.from Tkinter import *from tkMessageBox import *class PlainAndFancy( Frame ):   def __init__( self ):      Frame.__init__( self )      self.pack( expand = YES, fill = BOTH )      self.master.title( 'Buttons' )      self.plainButton = Button( self, text = 'Plain Button',                                    command = self.pressedPlain )      self.plainButton.bind( '<Enter>', self.rolloverEnter )      self.plainButton.bind( '<Leave>', self.rolloverLeave )      self.plainButton.pack( side = LEFT, padx = 5, pady = 5 )   def pressedPlain( self ):      showinfo( 'Message', 'You pressed: Plain Button' )   def rolloverEnter( self, event ):      event.widget.config( relief = GROOVE )   def rolloverLeave( self, event ):      event.widget.config( relief = RAISED )def main():   PlainAndFancy().mainloop()if __name__ == '__main__':   main()