我有这个显示页面的代码然后按PAGE1按钮转到其他框架。在这里,我想在任何标签中显示时间,但我希望它自动更新。我自己无法做到这一点
import Tkinter as tk
from Tkinter import *
import time
import datetime
def clock():
time = datetime.datetime.now().strftime("Time: %H:%M:%S")
print time
class MainApp(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
container = tk.Frame(self)
container.pack(side="top", fill="both", expand=True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
self.frames = {}
for F in (MainPage, page1, help):
page_name = F.__name__
frame = F(parent=container, controller=self)
self.frames[page_name] = frame
frame.grid(row=0, column=0, columnspan=12,sticky="nsew")
frame.grid_columnconfigure(0, weight=1)
frame.grid_columnconfigure(1, weight=1)
frame.grid_columnconfigure(2, weight=1)
frame.grid_columnconfigure(3, weight=1)
frame.grid_columnconfigure(4, weight=1)
frame.grid_columnconfigure(5, weight=1)
frame.grid_columnconfigure(6, weight=1)
frame.grid_columnconfigure(7, weight=1)
frame.grid_columnconfigure(8, weight=1)
frame.grid_columnconfigure(9, weight=1)
frame.grid_columnconfigure(10, weight=1)
frame.grid_columnconfigure(11, weight=1)
self.show_frame("MainPage")
clock()
def show_frame(self, page_name):
frame = self.frames[page_name]
frame.tkraise()
class MainPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
# line 0
label00 = tk.Label(self, text='00', height=2)
label00.configure(relief='raised')
label00.grid(row=0, column=0, sticky='nsew', columnspan=12)
# line 1
label10 = tk.Label(self, text='10')
label10.configure(relief='raised')
label10.grid(row=1, column=0, sticky='nsew')
label11 = tk.Label(self, text='LOGO')
label11.configure(relief='raised')
label11.grid(row=1, column=1, sticky='nsew', columnspan=4, rowspan=2)
label12 = tk.Label(self, text='12')
label12.configure(relief='raised')
label12.grid(row=1, column=5, sticky='nsew')
label13 = tk.Label(self, text='TITLE')
label13.configure(relief='raised')
label13.grid(row=1, column=6, sticky='nsew', columnspan=5)
label14 = tk.Label(self, text='14')
label14.configure(relief='raised')
label14.grid(row=1, column=11, sticky='nsew')
# line 2
label20 = tk.Label(self, text='20')
label20.configure(relief='raised')
label20.grid(row=2, column=0, sticky='nsew')
label21 = tk.Label(self, text='21')
label21.configure(relief='raised')
label21.grid(row=2, column=5, sticky='nsew')
label22 = tk.Label(self, text='Desc')
label22.configure(relief='raised')
label22.grid(row=2, column=6, sticky='nsew', columnspan=5)
label23 = tk.Label(self, text='23')
label23.configure(relief='raised')
label23.grid(row=2, column=11, sticky='nsew')
# line 3
label30 = tk.Label(self, text='30', height=2)
label30.configure(relief='raised')
label30.grid(row=3, column=0, sticky='nsew', columnspan=12)
#line 4
label40 = tk.Label(self, text='40', width=10)
label40.configure(relief='raised')
label40.grid(row=4, column=0, sticky='nsew')
label41 = tk.Label(self, text='STATUS', font=("Helvetica", 16), justify='center', fg="blue")
label41.configure(relief='raised')
label41.grid(row=4, column=1, columnspan=10)
label42 = tk.Label(self, text='42', width=10)
label42.configure(relief='raised')
label42.grid(row=4, column=11, sticky='nsew')
#line 5
label50 = tk.Label(self, text='50', height=2)
label50.configure(relief='raised')
label50.grid(row=5, column=0, columnspan=12, sticky="nsew")
#line 6
label60 = tk.Label(self, text='60', height=2)
label60.configure(relief='raised')
label60.grid(row=6, column=0, sticky='nsew')
buttonauto = tk.Button(self, text="PAGE1", font=("Helvetica", 16), justify='center', width=40, height=5,
command=lambda: controller.show_frame("page1"))
buttonauto.grid(row=6, column=1, columnspan=4)
label61 = tk.Label(self, text='61', height=2)
label61.configure(relief='raised')
label61.grid(row=6, column=5, sticky='nsew')
label62 = tk.Label(self, text='62', height=2)
label62.configure(relief='raised')
label62.grid(row=6, column=6, sticky='nsew')
buttoncam = tk.Button(self, text="HELP",font=("Helvetica", 16), justify='center', width=40, height=5,
command=lambda: controller.show_frame("help"))
buttoncam.grid(row=6 , column=7, columnspan=4)
label63 = tk.Label(self, text='63', height=2)
label63.configure(relief='raised')
label63.grid(row=6, column=11, sticky='nsew')
# line 7
label70 = tk.Label(self, text='70', height=2)
label70.configure(relief='raised')
label70.grid(row=7, column=0, sticky='nsew', columnspan=12)
#line 13
label13 = tk.Label(self, text='', height=2)
label13.configure(relief='raised')
label13.grid(row=13, column=0, columnspan=12, sticky="nsew")
#line 14
label14 = tk.Label(self, text='', width=10)
label14.grid(row=14, column=0, sticky='w')
buttonhlp = tk.Button(self, text="Help", width=20, height = 3,
command=lambda: controller.show_frame("help"))
buttonhlp.grid(row=14, column=1, columnspan=4)
label14 = tk.Label(self, text='')
label14.grid(row=14, column=5, columnspan=2)
buttonquit = tk.Button(self, text="Quit", width=20, height = 3, command=close_window)
buttonquit.grid(row=14, column=7, columnspan=4)
label14 = tk.Label(self, text='', width=10)
label14.grid(row=14, column=11, sticky='e')
#line 15
label15 = tk.Label(self, text='', height=5)
label15.grid(row=15, column=0, columnspan=12, sticky="nsew")
class page1(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
#line 0
label00 = tk.Label(self, text='PAGE1', height=2)
label00.configure(relief='raised')
label00.grid(row=13, column=0, columnspan=12, sticky="nsew")
#line 1
label10 = tk.Label(self, text='', width=10)
label10.grid(row=14, column=0, sticky='w')
buttonback = tk.Button(self, text="Back", width=20, height = 3,
command=lambda: controller.show_frame("MainPage"))
buttonback.grid(row=14, column=1, columnspan=4)
label10= tk.Label(self, text='')
label10.grid(row=14, column=5, columnspan=2)
buttonquit = tk.Button(self, text="Quit", width=20, height = 3, command=close_window)
buttonquit.grid(row=14, column=7, columnspan=4)
label10 = tk.Label(self, text='', width=10)
label10.grid(row=14, column=11, sticky='e')
#line 2
label20 = tk.Label(self, text='', height=5)
label20.grid(row=15, column=0, columnspan=12, sticky="nsew")
class help(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
#line 0
label00 = tk.Label(self, text='HELP', height=2)
label00.configure(relief='raised')
label00.grid(row=13, column=0, columnspan=12, sticky="nsew")
#line 1
label10 = tk.Label(self, text='', width=10)
label10.grid(row=14, column=0, sticky='w')
buttonback = tk.Button(self, text="Back", width=20, height = 3,
command=lambda: controller.show_frame("MainPage"))
buttonback.grid(row=14, column=1, columnspan=4)
label10= tk.Label(self, text='')
label10.grid(row=14, column=5, columnspan=2)
buttonquit = tk.Button(self, text="Quit", width=20, height = 3, command=close_window)
buttonquit.grid(row=14, column=7, columnspan=4)
label10 = tk.Label(self, text='', width=10)
label10.grid(row=14, column=11, sticky='e')
#line 2
label20 = tk.Label(self, text='', height=5)
label20.grid(row=15, column=0, columnspan=12, sticky="nsew")
def close_window ():
app.destroy()
if __name__ == "__main__":
app = MainApp()
app.overrideredirect(True)
app.geometry("{0}x{1}+0+0".format(app.winfo_screenwidth(), app.winfo_screenheight()))
app.focus_set() # <-- move focus to this widget
app.mainloop()
所以实际上我想要在打开page1框架时,在label00中我希望看到我在代码开头打印的时间。
答案 0 :(得分:2)
您应该使用after
方法,以便定期更新显示时间的标签。
以下帖子提供了有关如何执行此操作的详细说明:How to use the after method to make a callback run periodically?
让我们构建一个最小的例子。 首先,我需要一个根和一个标签:
import tkinter as tk
root = tk.Tk()
label = tk.Label(root, text="placeholder")
label.pack()
现在,我需要一个能够在标签中设置当前时间的函数。
正如我链接到的Q / A中所解释的那样,我需要这个函数来调用它自己。
由于我希望标签尽可能快地刷新,我会要求函数在一毫秒后调用自己。
可以使用time
模块,但datetime
模块包装后者以便提供人类可读的时间。
import datetime
def set_label():
currentTime = datetime.datetime.now()
label['text'] = currentTime
root.after(1, set_label)
现在我将调用set_label
函数,以启动循环,然后调用root.mainloop
以进入应用程序循环:
set_label()
root.mainloop()
所有在一起:
import tkinter as tk
import time
def set_label():
currentTime = datetime.datetime.now()
label['text'] = currentTime
root.after(1, set_label)
root = tk.Tk()
label = tk.Label(root, text="placeholder")
label.pack()
set_label()
root.mainloop()
答案 1 :(得分:0)
一种方法是定期调用函数并更新
GUI。在Tkinter中,通常使用通用窗口小部件方法after
来完成。
我修改了您的代码以创建StringVar
属性用于保存时间值并使用after()
调用新的clock()
方法
它也被添加到您的MainApp
课程中。所有这些方法都是更新
类实例的StringVar
属性。
我做的另一件事是修改__init__()
的{{1}}方法
在创建Page1
窗口小部件时使用textvariable
选项而不是text
选项的类,并指定添加到label00
类的StringVar
属性作为它的价值。
这样做的好处是,只要变量的值发生变化,标签就会自动更新。此外,您可以根据需要从GUI的不同部分引用此相同的属性。
注意我只修改了MainApp
类的label00
属性...您需要执行与您希望显示当前时间的其他地方类似的操作。 (它们都可以使用相同的Page1
属性。)
StringVar