Question

I ve been trying to program some kind of countdown in python with UI. It s my first time working with Custom tkinter. I ve encountered a small problem where if I input the time, the label won t change as it should. If you know how to change the text of the label into 00:00 format and make it change progresivelly, please let me know.

我在座谈了许多东西,如果有人对整部法典感兴趣的话:

from customtkinter import *
from PIL import Image
import time

app = CTk()
app.title( Countdown, hopefully )
app.geometry("500x400")
set_appearance_mode( light ) #or  light 


minutes, seconds = 0, 0
switch_var_1 = StringVar(value="off")


def countdown(t):

    def therest():
        setted_text.configure( {minutes:02d}:{seconds:02d} )

    while t:
        mins, secs = divmod(t, 60)
        timer =  {:02d}:{:02d} .format(mins, secs)
        therest()
        print(timer, end = "
")
        time.sleep(1)
        t -= 1

    print("ring")

def switch_event():
    if switch_var_1.get() ==  on :
        set_appearance_mode( dark )
    elif switch_var_1.get() ==  off :
        set_appearance_mode( light )

def start():
    t = time_entry.get()
    countdown(int(t))


entry_frame = CTkFrame(
    master=app,
    width=234,
    height=55,
    corner_radius=7,
    bg_color= transparent ,
    fg_color= transparent 
)

time_entry = CTkEntry(
    master=entry_frame,
    placeholder_text= Enter the time (in seconds): ,
    placeholder_text_color=( gray ,  #e3d296 ),
    text_color=( black ,  #ffe894 ),
    border_color=( gray ,  #e3d296 ),
    border_width=3,
    width=200,
    height=25,
    corner_radius=7
)

setted_text = CTkLabel(
    master=entry_frame,
    text= 00:00 ,
    font=( Brass Mono , 20),
    text_color=( black ,  #ffe894 )
)

def set_text():
    setted_text.configure(text=f"{time_entry.get()}")

button_entry = CTkButton(
    master=entry_frame,
    text= Set ,
    bg_color= transparent ,
    fg_color= transparent ,
    text_color=( black , #ffe894 ),
    border_color=( gray ,  #e3d296 ),
    hover_color=( #d9d9d9 ,  black ),
    corner_radius=1,
    height=25,
    width=40,
    border_width=3,
    command=set_text
)

switch_1 = CTkSwitch(
    master=app,
    text= Mode ,
    text_color=( black ,  #ffe894 ),
    command=switch_event,
    variable=switch_var_1, onvalue="on", offvalue="off",
    progress_color= #ddc774 ,
    button_color=( black ,  #ffe894 ),
    button_hover_color=( #3c3c3c ,  #ffeeac )
)

button_start = CTkButton(
    master=entry_frame,
    text= Start Countdown ,
    bg_color= transparent ,
    fg_color= transparent ,
    text_color=( black , #ffe894 ),
    border_color=( gray ,  #e3d296 ),
    hover_color=( #d9d9d9 ,  black ),
    corner_radius=7,
    height=25,
    width=40,
    border_width=3,
    command=start
)


switch_1.place(relx=1, rely=0.9, anchor= se )
time_entry.place(relx=0, rely=0, anchor= nw )
button_entry.place(relx=1, rely=0, anchor= ne )
entry_frame.place(relx=0.1, rely=0.1, anchor= nw )
setted_text.place(relx=0, rely=1, anchor= sw )
button_start.place(relx=1, rely=1, anchor= se )

app.mainloop()

Answer 1

Edit: 添加屏幕。

I ve encountered a small problem where if I input the time, the label won t change as it should.

。

Snippet:

def countdown(t):

    def therest():
        setted_text.configure( {seconds:02d} )

    while t:
        mins, secs = divmod(t, 60)
        timer =  {:01d} .format(secs)
        
        therest()
        print(timer)
        setted_text.configure(text=timer)  
        time.sleep(1)
         
        t -= 1
        app.update() 
        
    print("ring")
    setted_text.configure(text= ring )

检查:

Answer 2

如果你看上<条码>底盘内,CTkLabel.configure()的定义:

def configure(自称需要_redraw=False, **kwargs)

其后,封顶职能中的以下线将不更新标签:<代码>therest():

setted_text.configure( {minutes:02d}:{seconds:02d} )

由于您通过该说明作为论据的价值<代码>require_redraw,而不是text/code>。

另外,建议不要在临时申请中使用,因为它将阻止<条码>mainloop(>)处理待处理的事件和更新。

使用<代码>后(,而不是停留时间:

def countdown(t):
    mins, secs = divmod(t, 60)
    timer =  {:02d}:{:02d} .format(mins, secs)
    setted_text.configure(text=timer)
    print(timer, end="
")
    if t > 0:
        # update the label again after 1 second
        setted_text.after(1000, countdown, t-1)
    else:
        print("ring")

值得注意的是,在计票期间,这些纽子更容易脱掉。

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