import os
import sys
import _tkinter
import Tkinter
import tkFont
from Tkinter import *

class CustomButton(Button):
    def __init__(self,master,*args,**kwargs):
        Button.__init__(self,master,*args,**kwargs)
        self.bind('<Button-3>', self.on_mouse_rightclick)
        self.entry=None
        self['text']='12345'
        self.italic_font = tkFont.Font(self, self.cget("font"))
        self.italic_font.configure(slant="italic")
        self.default_font = self.cget('font')

    def on_mouse_rightclick(self, event):
        print 'on_mouse_rightclick'
        if self.entry!=None:
            print 'Non-null entry'
            return
        self.prev_state = self["state"]
        self.entry=Entry(self,{"width":8})
        self.entry.pack(side=TOP,anchor=W)
        self.entry.insert(0,self['text'])
        self.entry.bind('<Return>', self.on_entry_edit)
        self.entry.bind('<Escape>', self.on_escape)
        self['state']=DISABLED
        self.lower(self.entry)
        return
    def on_entry_edit(self, event):
        print 'on_entry_edit'
        entry_str = self.entry.get()
        self['text']=entry_str
        self.lift()
        self['state']=self.prev_state
        self.entry.destroy()
        self.entry=None
    def on_escape(self, event):
        print 'on_escape'
        if self.entry==None:
            return
        self.lift()
        self['state']=self.prev_state
        self.entry.destroy()
        self.entry=None


class Application(Frame):
    def __init__(self, master=None):
        self.root = Tk()
        Frame.__init__(self, master)
        self.button=CustomButton(self)
        self.button.pack(side="top",anchor=N)
        self.button2=CustomButton(self)
        self.button2.pack(side="top",anchor=N)
        self.pack()

app = Application()
app.mainloop()