python 布局管理器grid 计算器制作

原创于 2023-04-07 17:56:48 发布 · 341 阅读

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该代码示例展示了如何用Python的tkinter库以面向对象的方式创建一个简单的图形用户界面(GUI)计算器。程序定义了一个Application类，该类继承自Frame，并在其中创建了计算器的各种按钮，采用了grid布局来组织这些按钮。


""" 计算器软件的制作 the making of calculator"""

"""使用面向对象的方式写GUI"""
import random

"""Write GUI in an object-oriented manner"""
from tkinter import *

class Application(Frame):

    def __init__(self,master=None):
        super().__init__(master)
        self.master = master
        self.pack()
        self.createWidget()

    def createWidget(self):
        """ 通过grid布局实现计算器页面"""
        """ calculator pages are implemented through grid layout"""
        btnText = (
            ("mc", "m+", "m-", "mr"),
            ("c", "+", "/", "x"),
            (7, 8, 9, "-"),
            (4, 5, 6, "+"),
            (1, 2, 3, "="),
            (0, ".")
        )
        Entry(self).grid(row=0, column=0, columnspan=4, pady=10)

        for rindex, r in enumerate(btnText):
            for cindex, c in enumerate(r):
                if c == "=":
                    Button(self, text=c, width=2).grid(row=rindex+1, column=cindex, rowspan=3, sticky=EW)
                elif c == 0:
                    Button(self, text=c, width=2).grid(row=rindex+1, column=cindex, columnspan=2, sticky=NSEW)
                elif c == ".":
                    Button(self, text=c, width=2).grid(row=rindex + 1, column=cindex+1, sticky=EW)
                else:
                    Button(self, text=c, width=2).grid(row=rindex+1, column=cindex, sticky=EW)

if __name__ == '__main__':
    root = Tk()
    root.geometry("180x240+200+300")
    app = Application(master=root)
    root.title('Test for calculator')
    root.mainloop()