Day024 GUI---通过 grid 布局-实现计算器软件界面

"""测试 通过 grid 布局-实现计算器软件界面。使用面向对象的方式""" from tkinter import * class Application(Frame): def __init__(self, master=None): super().__init__(master) # super() 代表的是父类的定义，而不是父类对象 self.master = master self.pack() self.createWidget() def createWidget(self): """ 通过 grid 布局-实现计算器软件界面。""" btnText = (("MC", "M+", "M-", "MR"), ("C", "±", "÷", "×"), (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=2, sticky=NSEW) 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=NSEW) else: Button(self, text=c, width=2).grid(row=rindex + 1, column=cindex, sticky=NSEW) if __name__ == "__main__": root = Tk() root.geometry("160x230+400+300") root.title("计算器") app = Application(master=root) root.mainloop() # 调用tk的主循环。

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