python - Python tkinter 时钟的白天主题和夜晚主题

Question

我一直在研究使用 Python Tkinter 制作一个时钟。我已经设法做到了，并且想把它提升到一个新的水平:自动日/夜主题更改。我已经尝试使用 strftime 和我自己的代码来近似估计现在是白天还是晚上。代码总是给我错误的数字颜色，但给我正确的冒号颜色。

有时它只适用于这个时钟代码，但不适用于我的完整代码。

这是我的完整代码:

#!/usr/bin/env python

import sys
if sys.version_info[0] == 2:
    import Tkinter as tk
else:
    import tkinter as tk
from time import sleep, strftime
import datetime
import feedparser
import time
from itertools import cycle
dark = {1:16, 2:17, 3:18, 4:19, 5:19, 6:20, 7:20, 8:19, 9:18, 10:17, 11:16, 12:16}
#month_number : sunrise_hour
light = {1:8, 2:7, 3:6, 4:5, 5:4, 6:4, 7:4, 8:5, 9:6, 10:6, 11:7, 12:8}
root = tk.Tk()
current_theme = "not set"
d = feedparser.parse('https://www.reddit.com/r/news/.rss')
post_list = cycle(d.entries)
def exitt():
    sleep(3)
    root.destroy()
def theme_updater(theme_bg, theme_fg):
    clock.config(bg=theme_bg, fg=theme_fg)
    extra_clock.config(bg=theme_bg, fg=theme_fg)
    label_rss.config(bg=theme_bg, fg=theme_fg)
    end.config(fg=theme_fg, bg=theme_bg)
time1 = ''
extra_time1 = ''
clock = tk.Label(root, font=('calibri light', 150))
clock.pack(fill=tk.BOTH, expand=1)
extra_clock = tk.Label(root, font=('calibri light', 45))
extra_clock.pack(fill=tk.BOTH, expand=1)
label_rss = tk.Label(root, font=('calibri', 14))
label_rss.pack(fill=tk.BOTH)
end = tk.Button(root, text="Exit", font=('bold', 18), bd=0, borderwidth=0, highlightthickness=0, command=lambda:exitt(), height=0, width=0)
end.pack(fill=tk.BOTH)
def rssfeeds():
    post = next(post_list)
    RSSFEED = post.title
    modTXT = 'r/news Feed:  ' + RSSFEED
    label_rss.config(text=modTXT)
    root.after(8000, rssfeeds)
rssfeeds()
def tick():
 global current_theme
 global time1
 time2 = strftime("%H:%M:%S")
 if time2 != time1:
  time1 = time2
  clock.config(text=time2)
 time_now = time.localtime()
 if time_now.tm_hour <= dark[time_now.tm_mon] or time_now.tm_hour < light[time_now.tm_mon]:
        if current_theme != "night":
            theme_updater("black", "white")
            current_theme = "night"
            print('Night time theme set.')
 else:
        if current_theme != "day":
            theme_updater("white", "black")
            current_theme = "day"
            print('Day time theme set.')
 clock.after(1000, tick)
def ticki():
 global extra_time1
 extra_time2 = strftime("%A, %d %B %Y")
 if extra_time2 != extra_time1:
  extra_time1 = extra_time2
  extra_clock.config(text=extra_time2)
 extra_clock.after(1000, ticki)
tick()
ticki()
w, h = root.winfo_screenwidth(), root.winfo_screenheight()
root.overrideredirect(1)
root.geometry("%dx%d+0+0" % (w, h))
root.focus_set()
root.mainloop()

这是我的完整代码中日主题发生的事情: 关于夜间主题:

Answer 1

根据您提供的代码，我移动了一些东西并更新了 tick() 函数以检查当前时间状态。

通过添加一个跟踪变量来查看我们是否已经为当天设置了主题，我们可以防止程序每隔几秒重新应用一次主题，每天只应用一次。

如果你翻转这条线:

if time_now.tm_hour >= dark[time_now.tm_mon] or time_now.tm_hour < light[time_now.tm_mon]:

对此:

if time_now.tm_hour <= dark[time_now.tm_mon] or time_now.tm_hour > light[time_now.tm_mon]:

您可以进行影响测试以确保夜间主题有效，这样您就不必整天等待。

我还更改了 after() 语句以在 1 秒后刷新时钟，因为每秒更新时钟 5 次是没有意义的。

看看下面的代码，如果您有任何问题，请告诉我。

import Tkinter as tk
import time

dark = {1:16, 2:17, 3:18, 4:19, 5:19, 6:20, 7:20, 8:19, 9:18, 10:17, 11:16, 12:16}
#month_number : sunrise_hour
light = {1:8, 2:7, 3:6, 4:5, 5:4, 6:4, 7:4, 8:5, 9:6, 10:6, 11:7, 12:8}

root = tk.Tk()
time1 = ''
clock = tk.Label(root, font=('calibri', 20, 'bold'))
clock.pack(fill=tk.BOTH, expand=1)
current_theme = "not set"

def theme_updater(theme_bg, theme_fg):
    clock.config(bg=theme_bg, fg=theme_fg)

def tick():
    global time1, clock, current_theme
    time2 = time.strftime('%H:%M:%S')

    if time2 != time1:
        time1 = time2
        clock.config(text=time2)

    time_now = time.localtime()
    if time_now.tm_hour >= dark[time_now.tm_mon] or time_now.tm_hour < light[time_now.tm_mon]:
        if current_theme != "night":
            theme_updater("black", "white")
            current_theme = "night"
            print('Night time theme set.')
    else:
        if current_theme != "day":
            theme_updater("white", "black")
            current_theme = "day"
            print('Day time theme set.')
    clock.after(1000, tick)

tick()
root.mainloop()

更新:

根据您更新的问题，我已将您的代码重新编写为 OOP。我无法重现您的错误，但有些事情看起来需要更改。例如，您在 tkinter 中使用了 sleep，这将导致您的程序卡住。我们可以使用 after 代替。

我删除了 rss 提要部分，因为它与测试无关。

看看下面的例子，如果有帮助请告诉我。

import tkinter as tk
from time import strftime
import time


class MyApp(tk.Tk):
    def __init__(self):
        tk.Tk.__init__(self)
        self.dark = {1:16, 2:17, 3:18, 4:19, 5:19, 6:20, 7:20, 8:19, 9:18, 10:17, 11:16, 12:16}
        self.light = {1:8, 2:7, 3:6, 4:5, 5:4, 6:4, 7:4, 8:5, 9:6, 10:6, 11:7, 12:8}
        self.current_theme = "not set"
        self.time1 = ''
        self.extra_time1 = ''
        self.clock = tk.Label(self, font=('calibri light', 150))
        self.clock.pack(fill=tk.BOTH, expand=1)
        self.extra_clock = tk.Label(self, font=('calibri light', 45))
        self.extra_clock.pack(fill=tk.BOTH, expand=1)
        self.label_rss = tk.Label(self, font=('calibri', 14))
        self.label_rss.pack(fill=tk.BOTH)
        self.end = tk.Button(self, text="Exit", font=('bold', 18), bd=0, borderwidth=0, highlightthickness=0, command=self.exitt, height=0, width=0)
        self.end.pack(fill=tk.BOTH)
        self.w, self.h = self.winfo_screenwidth(), self.winfo_screenheight()
        self.overrideredirect(1)
        self.geometry("%dx%d+0+0" % (self.w, self.h))
        self.focus_set()
        self.tick()
        self.ticki()

    def exitt(self):
        self.after(3000, self.destroy)

    def theme_updater(self, theme_bg, theme_fg):
        self.clock.config(bg=theme_bg, fg=theme_fg)
        self.extra_clock.config(bg=theme_bg, fg=theme_fg)
        self.label_rss.config(bg=theme_bg, fg=theme_fg)
        self.end.config(fg=theme_fg, bg=theme_bg)

    def tick(self):
        time2 = strftime("%H:%M:%S")
        if time2 != self.time1:
            self.time1 = time2
            self.clock.config(text=time2)
        time_now = time.localtime()
        if time_now.tm_hour >= self.dark[time_now.tm_mon] or time_now.tm_hour < self.light[time_now.tm_mon]:
            if self.current_theme != "night":
                self.theme_updater("black", "white")
                self.current_theme = "night"
                print('Night time theme set.')
        else:
            if self.current_theme != "day":
                self.theme_updater("white", "black")
                self.current_theme = "day"
                print('Day time theme set.')
        self.clock.after(1000, self.tick)

    def ticki(self):
        extra_time2 = strftime("%A, %d %B %Y")
        if extra_time2 != self.extra_time1:
            self.extra_time1 = extra_time2
            self.extra_clock.config(text=extra_time2)
        self.extra_clock.after(1000, self.ticki)

app = MyApp()
app.mainloop()