- import tkinter as tk
- from tkinter import font
-
- class Calculator:
- def __init__(self, master):
- self.master = master
- master.title("Calculator")
- master.geometry("350x560")
- master.resizable(width=False, height=False)
-
- # 设置按钮和文本框字体
- self.button_font = font.Font(size=20)
- self.equation_font = font.Font(size=30)
-
- # 创建显示方程的文本框
- self.equation = tk.Entry(master, width=12, font=self.equation_font, borderwidth=0, justify=tk.RIGHT)
- self.equation.grid(row=0, column=0, columnspan=4, padx=10, pady=20, ipady=15)
-
- # 创建数字按钮
- self.create_button("C", 1, 0, bg="white", fg="black", width=4, height=2)
- self.create_button("", 1, 1, bg="white", fg="black", width=4, height=2)
- self.create_button("%", 1, 2, bg="white", fg="black", width=4, height=2)
- self.create_button("", 1, 3, bg="#FF9500", fg="white", width=4, height=2)
-
- self.create_button("7", 2, 0, bg="#E4E4E4", fg="black")
- self.create_button("8", 2, 1, bg="#E4E4E4", fg="black")
- self.create_button("9", 2, 2, bg="#E4E4E4", fg="black")
- self.create_button("", 2, 3, bg="#FF9500", fg="white", width=4, height=2)
-
- self.create_button("4", 3, 0, bg="#E4E4E4", fg="black")
- self.create_button("5", 3, 1, bg="#E4E4E4", fg="black")
- self.create_button("6", 3, 2, bg="#E4E4E4", fg="black")
- self.create_button("-", 3, 3, bg="#FF9500", fg="white", width=4, height=2)
-
- self.create_button("1", 4, 0, bg="#E4E4E4", fg="black")
- self.create_button("2", 4, 1, bg="#E4E4E4", fg="black")
- self.create_button("3", 4, 2, bg="#E4E4E4", fg="black")
- self.create_button("+", 4, 3, bg="#FF9500", fg="white", width=4, height=2)
-
- self.create_button("0", 5, 0, bg="#E4E4E4", fg="black", width=8)
- self.create_button(".", 5, 2, bg="#E4E4E4", fg="black")
- self.create_button("=", 5, 3, bg="#FF9500", fg="white", width=4, height=2)
-
- def create_button(self, text, row, column, bg="#F0F0F0", fg="black", width=2, height=1):
- # 创建按钮
- button = tk.Button(self.master, text=text, bg=bg, fg=fg, width=width, height=height, font=self.button_font,
- borderwidth=0, command=lambda: self.button_click(text))
- button.grid(row=row, column=column, padx=5, pady=5, ipady=5, sticky="NSEW")
-
- def button_click(self, text):
- if text == "C":
- self.equation.delete(0, tk.END)
- elif text == "":
- equation = self.equation.get()
- if equation.startswith("-"):
- self.equation.delete(0)
- self.equation.insert(0, equation[1:])
- elif equation:
- self.equation.insert(0, "-")
- elif text == "%":
- equation = self.equation.get()
- try:
- result = float(equation) / 100
- self.equation.delete(0, tk.END)
- self.equation.insert(0, result)
- except ValueError:
- pass
- elif text in ["+", "-", "", ""]:
- if self.equation.get() and not self.equation.get().endswith(("+", "-", "", "")):
- self.equation.insert(tk.END, text)
- elif text == ".":
- if self.equation.get() and "." not in self.equation.get():
- self.equation.insert(tk.END, ".")
- elif not self.equation.get():
- self.equation.insert(tk.END, "0.")
- elif text == "=":
- equation = self.equation.get()
- try:
- result = eval(equation)
- self.equation.delete(0, tk.END)
- self.equation.insert(0, result)
- except (SyntaxError, ZeroDivisionError):
- self.equation.delete(0, tk.END)
- self.equation.insert(0, "Error")
-
- else:
- self.equation.insert(tk.END, text)
-
- # 创建主窗口
- root = tk.Tk()
-
- # 创建计算器 GUI
- calculator = Calculator(root)
-
- # 进入主事件循环
- root.mainloop()
