# -*- coding: cp1252 -*-
'''
Created on 08/giu/2011

@author: Mirò
'''

from Tkinter import *

def frame(root, side):
    w = Frame(root)
    w.pack(side = side, expand = YES, fill = BOTH)
    return w

def button(root, side, text, command = None):
    w = Button(root, text = text, command = command)
    w.pack(side = side, expand = YES, fill = BOTH)
    return w

class Calcolatrice(Frame):
    '''
    calcolatrice
    '''
    calculated = False

    def __init__(self):
        Frame.__init__(self)
        self.option_add("*Font", "Verdana 12 bold")
        self.pack(expand = YES, fill = BOTH)
        self.master.title("Cacolatrice")
        self.master.iconname("Calc1")

        display = StringVar()
        Entry(self, relief = SUNKEN, textvariable = display).pack(side = TOP, expand = YES, fill = BOTH)

        for key in ("123","456","789","-0."):
            keyF = frame(self, TOP)
            for char in key:
                button(keyF, LEFT, char, lambda w = display, c = char: w.set(w.get() + c))

        opsF = frame(self, TOP)
        for char in "+-*/=":
            if char == "=":
                btn = button(opsF, LEFT, char)
                btn.bind("<ButtonRelease-1>", lambda e, s = self, w = display: s.calc(w), "+")
            else:
                btn = button(opsF, LEFT, char, lambda w=display, s=' %s '%char: w.set(w.get()+s))

        clearF = frame(self, BOTTOM)
        button(clearF, LEFT, "Clr", lambda w=display: w.set(''))

    def writeCalculation(self, w, s):
        print(s)

        if self.calculated:
            w.set(s)
        else:
            w.set(w.get() + s)

    def reset(self, w):
        print("entro")
        w.set("")

    def calc(self, display):
        try:
            display.set(eval(display.get()))
            self.calculated = True
        except:
            display.set("ERROR")