我刚刚开始使用 kivy 和 Tkinter 为初学者开发简单的应用程序。最近，我创建了一个可以在桌面上使用的数字时钟程序。它工作正常，因为它很简单，只需几行代码。我想添加一项功能，即警报。任何人都可以请指导我如何去做。
这是我第一次，所以不确定我是否以正确的方式发布了这个问题。所以下面是我用来获取输出的代码。
import tkinter as tk
from tkinter.ttk import *
# I imported strftime to use for formatting time details of the program.
from time import strftime
import datetime
# creating tkinter window
root = tk.Tk()
root.title('Clock')
root.attributes('-topmost', True) # This line here sets our app to be the
topmost in the window screen.
# root.attributes('-topmost', False) When this line is added, the app will
no longer have that topmost privilege.
# This function will show us the calender on the program.
def datetime():
string1 = strftime('%d/%b/%Y') # This line can be joined with the other one below with \n and it will work.
lbl1.config(text=string1)
lbl1.after(1000, datetime)
lbl1 = Label(root, font=('verdana', 20, 'bold'), background='black',
foreground='#808000')
lbl1.pack(fill=tk.BOTH)
datetime()
# This function is used to display time on our label
def time():
string = strftime('%H:%M:%S %p')
lbl.config(text=string)
lbl.after(1000, time) # updating the label.
# Giving the Label some style.
lbl = Label(root, font=('verdana', 22, 'bold'), background='#050929',
foreground='silver')
# packing the Label to the center.
# of the tkinter window
lbl.pack(anchor=tk.CENTER)
time()
root.mainloop()
对于程序解决方案，只需添加tkinter的after方法。
import tkinter as tk
import datetime
def tick():
showed_time = ''
current_time = datetime.datetime.now().strftime("%H:%M:%S")
if showed_time != current_time:
showed_time = current_time
clock.configure(text=current_time)
clock.after(1000, tick)
if showed_time == '10:00:00': #10 o'clock print alarm
print('alarm')
root=tk.Tk()
clock = tk.Label(root)
clock.pack()
tick()
root.mainloop()
面向对象的解决方案可能是这样的：
import tkinter as tk
from tkinter import ttk as ttk
import datetime
root=tk.Tk()
class AlarmClock(tk.Frame):
def __init__(self, master):
tk.Frame.__init__(self, master)
self.all_alarms = []
self.ini_body()
self.ini_clock()
self.ini_mid()
self.ini_table()
def ini_body(self):
self.up_frame = tk.Frame(self)
self.mid_frame= tk.Frame(self)
self.dow_frame= tk.Frame(self)
self.up_frame.pack(side='top')
self.mid_frame.pack(side='top',fill='x')
self.dow_frame.pack(side='top')
def ini_clock(self):
self.clock = tk.Label(self.up_frame, text='00:00:00')
self.clock.pack(side='top', fill='x')
self.tick()
def tick(self):
self.showed_time = ''
self.current_time = datetime.datetime.now().strftime("%H:%M:%S")
if self.showed_time != self.current_time:
self.showed_time = self.current_time
self.clock.configure(text=self.current_time)
if self.showed_time in self.all_alarms:
self.invoke_alarm(self.showed_time)
self.after(1000, self.tick)
def ini_table(self):
self.table = ttk.Treeview(self.dow_frame,height=10,columns=('#1'))
self.table.heading('#0', text='Alarm ID')
self.table.heading('#1', text='Alarm time')
self.table.pack()
def ini_mid(self):
self.alarm_id = tk.Entry(self.mid_frame,justify='center')
self.alarm_id.insert('end','Alarm ID')
self.alarm_time = tk.Entry(self.mid_frame,justify='center')
self.alarm_time.insert('end','HH:MM')
self.set_button = tk.Button(self.mid_frame, text='set alarm',
command=self.set_alarm)
self.cancel_button=tk.Button(self.mid_frame, text='cancel alarm',
command=self.cancel_alarm)
self.alarm_time.grid(column=1,row=0,sticky='ew')
self.alarm_id.grid(column=0,row=0, sticky='we')
self.set_button.grid(column=0, row=1, sticky='ew')
self.cancel_button.grid(column=1, row=1, sticky='ew')
self.mid_frame.columnconfigure(0, weight=1)
self.mid_frame.columnconfigure(1, weight=1)
def set_alarm(self):
Id = self.alarm_id.get()
time = self.alarm_time.get()
self.table.insert('','end', iid=Id, text=Id,
values=time, tags=time)
self.register_alarm()
def cancel_alarm(self):
Id = self.alarm_id.get()
time = self.alarm_time.get()
if self.table.exists(Id):
tag = self.table.item(Id, "tags")[0]
alarm_time=tag+":00"
self.all_alarms.remove(alarm_time)
self.table.delete(Id)
elif self.table.tag_has(time):
Id = self.table.tag_has(time)[0]
tag = self.table.item(Id, "tags")[0]
alarm_time=tag+":00"
self.all_alarms.remove(alarm_time)
self.table.delete(Id)
def register_alarm(self):
self.all_alarms.append(f'{self.alarm_time.get()}:00')
def invoke_alarm(self, time):
self.alarm_window = tk.Toplevel()
self.alarm_window.title('Alarm!')
self.message = tk.Label(self.alarm_window,
text=f"ALARM!! It's {time[:5]} o'clock!")
self.message.pack(fill='both')
alarm = AlarmClock(root)
alarm.pack()
root.mainloop()
希望您喜欢，如果您对此有任何疑问，请告诉我。
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我来说两句