tkinter 的两个例子

第一个例子：after

用于定时操作

import tkinter as tk

import time

class MyApp(tk.Frame):

    def __init__(self, msecs=1000):

        super().__init__()

        self.pack()

        self.msecs = msecs

        self.utc_time = tk.Label(self, text='', bg='navy', fg='white')

        self.utc_time.pack()

        self.cst_time = tk.Label(self, text='', bg='navy', fg='white')

        self.cst_time.pack()

        self.repeater()

    def repeater(self):

        self.utc_time.config(text= 'UTC: ' + time.strftime('%Y/%m/%d %H:%M:%S',time.gmtime()))

        self.cst_time.config(text= 'CST: ' + time.strftime('%Y/%m/%d %H:%M:%S',time.localtime()))

        self.after(self.msecs, self.repeater)

if __name__ == '__main__':

    MyApp(msecs=1000).mainloop()

效果图：

第二个例子：pack_forget

用于切换窗口部件的显示、隐藏

import tkinter as tk

class MyApp(tk.Frame):

    def __init__(self):

        super().__init__()

        self.pack()

        # 两个按钮

        self.rowframe = tk.Frame(self)

        self.rowframe.pack(fill='x')

        self.btn2 = tk.Button(self.rowframe, text='按钮2') # , command=self.update

        self.btn2.pack(side=tk.RIGHT)

        self.btn1 = tk.Button(self.rowframe, text='按钮1')

        self.btn1.pack(side=tk.RIGHT)

        self.btn1.bind('<Button-1>', self.update)

        self.btn2.bind('<Button-1>', self.update)

    # 测试pack_forget

    def update(self, event):

        #print(dir(event))

        if event.widget == self.btn1:

            self.btn1.forget()

            self.btn2.pack(side=tk.RIGHT)

        else:

            self.btn2.pack_forget() # 故意的

            self.btn1.pack(side=tk.RIGHT)

if __name__ == '__main__':

    MyApp().mainloop()

效果图：