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Copy pathcalculator.py
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192 lines (164 loc) · 6.59 KB
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from tkinter import *
from tkinter import ttk
from enum import Enum
# 添加了ce,c,back,乘方的功能
class State(Enum):
calculated = 0
in_number1 = 1
post_operator = 2
in_number2 = 3
class Calculator(Tk):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.title('Simple calculator')
self.geometry('400x600')
self.result_string = StringVar()
self.result_string.set('0')
self.old_number1 = ['0']
self.old_number2 = ['0']
self.number1 = '0'
self.number2 = None
self.operator = None
self.state = State.calculated
# Output
output = ttk.Label(self, textvariable=self.result_string,
font=('TKDefaulFont', 48), anchor=E)
output.pack(side=TOP, expand=True, fill=BOTH)
# row 1
row = Frame(self)
row.pack(side=TOP, expand=True, fill=BOTH)
self.add_button(row, 'CE', self.on_ce_click)
self.add_button(row, 'C', self.on_c_click)
self.add_button(row, 'Back', self.on_back_click)
self.add_button(row, '/', self.on_division_click)
# row 2
row = Frame(self)
row.pack(side=TOP, expand=True, fill=BOTH)
self.add_button(row, '7', self.gen_on_number_click('7'))
self.add_button(row, '8', self.gen_on_number_click('8'))
self.add_button(row, '9', self.gen_on_number_click('9'))
self.add_button(row, 'x', self.on_multiply_click)
# row 3
row = Frame(self)
row.pack(side=TOP, expand=True, fill=BOTH)
self.add_button(row, '4', self.gen_on_number_click('4'))
self.add_button(row, '5', self.gen_on_number_click('5'))
self.add_button(row, '6', self.gen_on_number_click('6'))
self.add_button(row, '-', self.on_minus_click)
# row 4
row = Frame(self)
row.pack(side=TOP, expand=True, fill=BOTH)
# self.add_button(row, '1', self.on_1_click)
self.add_button(row, '1', self.gen_on_number_click('1'))
self.add_button(row, '2', self.gen_on_number_click('2'))
self.add_button(row, '3', self.gen_on_number_click('3'))
self.add_button(row, '+', self.on_add_click)
# row 5
row = Frame(self)
row.pack(side=TOP, expand=True, fill=BOTH)
self.add_button(row, '^', self.on_power_click)
self.add_button(row, '0', self.gen_on_number_click('0'))
self.add_button(row, '.', self.gen_on_number_click('.'))
self.add_button(row, '=', self.on_equal_click)
def add_button(self, parent, text=None, command=None):
button = ttk.Button(parent, text=text, command=command)
button.pack(side=LEFT, expand=True, fill=BOTH)
def on_ce_click(self):
self.on_operator('ce')
print('ce clicked.')
def on_c_click(self):
self.on_operator('ce')
print('c clicked.')
def on_back_click(self):
self.on_number('back')
print('back clicked.')
def on_division_click(self):
self.on_operator('/')
print('division clicked.')
def gen_on_number_click(self, ch):
return lambda: self.on_number(ch)
# def on_1_click(self):
# self.on_number('1')
# print('1 clicked.')
def on_number(self, ch):
print(self.state)
if self.state == State.calculated:
self.number1 = ch
self.state = State.in_number1
self.result_string.set(self.number1)
elif self.state == State.in_number1:
if ch != 'back':
self.old_number1.append(self.number1)
self.number1 = self.number1 + ch
self.result_string.set(self.number1)
else:
self.number1 = self.old_number1.pop()
self.result_string.set(self.number1)
if len(self.old_number1) == 0:
self.old_number1.append('0')
elif self.state == State.post_operator:
self.number2 = ch
self.state = State.in_number2
self.result_string.set(self.number2)
elif self.state == State.in_number2:
if ch != 'back':
self.old_number2.append(self.number2)
self.number2 = self.number2 + ch
self.result_string.set(self.number2)
else:
self.number2 = self.old_number2.pop()
self.result_string.set(self.number2)
if len(self.old_number2) == 0:
self.old_number2.append('0')
else:
assert (0)
def on_multiply_click(self):
print('x clicked.')
self.on_operator('*')
def on_minus_click(self):
print('- clicked.')
self.on_operator('-')
def on_add_click(self):
print('+ clicked.')
self.on_operator('+')
def on_power_click(self):
print('^ clicked.')
self.on_operator('^')
def on_operator(self, operator):
if operator == 'ce':
self.operator = operator
self.on_equal_click()
self.state = State.calculated
elif self.state == State.calculated:
self.state = State.post_operator
elif self.state == State.in_number1:
self.state = State.post_operator
# elif self.state == State.post_operator:
elif self.state == State.in_number2:
self.on_equal_click()
self.state = State.post_operator
else:
assert (0)
self.operator = operator
def on_equal_click(self):
if self.operator != 'ce' and self.state != State.in_number2:
return
if self.operator != 'ce':
print('= clicked.')
if self.operator == '+':
self.number1 = str(float(self.number1) + float(self.number2))
elif self.operator == '-':
self.number1 = str(float(self.number1) - float(self.number2))
elif self.operator == '*':
self.number1 = str(float(self.number1) * float(self.number2))
elif self.operator == '/':
self.number1 = str(float(self.number1) / float(self.number2))
elif self.operator == '^':
self.number1 = str(float(self.number1) ** float(self.number2))
elif self.operator == 'ce':
self.number1 = str(0)
self.result_string.set(self.number1)
self.state = State.calculated
if __name__ == '__main__':
app = Calculator()
app.mainloop()