用Python实现了一个简单的倒计时小程序，有GUI界面
# 倒计时程序 苏一行 20229639 2024/08/09
import tkinter as tk
from tkinter import messagebox
import winsound
class CountdownApp:
def __init__(self, root):
self.root = root
self.root.title("倒计时程序")
# 设置窗口居中
self.center_window()
# 声明部分变量
self.hour_var = tk.StringVar()
self.min_var = tk.StringVar()
self.sec_var = tk.StringVar()
self.create_widgets()
self.running = False
self.timer = None
self.first_star = True
self.total_seconds = 0
# 添加Canvas和相关属性
self.count = 0
self.angle = 359.99
self.cv = tk.Canvas(self.root, width=450, height=450, bg='white')
self.cv.grid(row=4, column=0, columnspan=6, padx=10, pady=10)
self.cv_arc = self.cv.create_oval(100, 50, 350, 300, fill='red', outline='yellow')
self.cv.create_oval(150, 100, 300, 250, fill='yellow', outline='yellow')
self.cv_text = self.cv.create_text(225, 175, text="00:00:00", font=('微软雅黑', 24, 'bold'), fill='red')
# 设置窗口居中
def center_window(self):
screen_width = self.root.winfo_screenwidth()
screen_height = self.root.winfo_screenheight()
window_width = 470
window_height = 500
position_top = int(screen_height / 2 - window_height / 2)
position_right = int(screen_width / 2 - window_width / 2)
self.root.geometry(f'{window_width}x{window_height}+{position_right}+{position_top}')
# 创建组件
def create_widgets(self):
tk.Label(self.root, text="设置时间:", font=("宋体", 12)).grid(row=0, column=0, padx=10, pady=10)
tk.Label(self.root, text="小时:", font=("宋体", 12)).grid(row=1, column=0, padx=10, pady=10)
self.hour_entry = tk.Entry(self.root, textvariable=self.hour_var, width=5, font=("微软雅黑", 12))
self.hour_entry.grid(row=1, column=1, padx=10, pady=10)
self.hour_var.set("0")
tk.Label(self.root, text="分钟:", font=("宋体", 12)).grid(row=1, column=2, padx=10, pady=10)
self.min_entry = tk.Entry(self.root, textvariable=self.min_var, width=5, font=("微软雅黑", 12))
self.min_entry.grid(row=1, column=3, padx=10, pady=10)
self.min_var.set("0")
tk.Label(self.root, text="秒:", font=("宋体", 12)).grid(row=1, column=4, padx=10, pady=10)
self.sec_entry = tk.Entry(self.root, textvariable=self.sec_var, width=5, font=("微软雅黑", 12))
self.sec_entry.grid(row=1, column=5, padx=10, pady=10)
self.sec_var.set("0")
self.start_button = tk.Button(self.root, text="开始", command=self.start_countdown, font=("宋体", 12))
self.start_button.grid(row=2, column=0, columnspan=2, padx=10, pady=10)
self.pause_button = tk.Button(self.root, text="暂停", command=self.pause_countdown, state=tk.DISABLED,
font=("宋体", 12))
self.pause_button.grid(row=2, column=2, columnspan=2, padx=10, pady=10)
self.reset_button = tk.Button(self.root, text="重置", command=self.reset_countdown, font=("宋体", 12))
self.reset_button.grid(row=2, column=4, columnspan=2, padx=10, pady=10)
# 开始按钮
def start_countdown(self):
if self.first_star:
try:
h = int(self.hour_var.get()) if self.hour_var.get() else 0
m = int(self.min_var.get()) if self.min_var.get() else 0
s = int(self.sec_var.get()) if self.sec_var.get() else 0
except ValueError:
messagebox.showerror("错误", "请输入有效的时间")
return
self.total_seconds = h * 3600 + m * 60 + s
if self.total_seconds > 0:
self.hour_entry.config(state='disabled')
self.min_entry.config(state='disabled')
self.sec_entry.config(state='disabled')
self.first_star = False
self.running = True
self.count = self.total_seconds
self.start_button.config(state=tk.DISABLED)
self.pause_button.config(state=tk.NORMAL)
self.countdown()
else:
messagebox.showerror("错误", "输入时间必须为正值")
else:
self.running = True
self.start_button.config(state=tk.DISABLED)
self.pause_button.config(state=tk.NORMAL)
self.countdown()
# 暂停按钮
def pause_countdown(self):
if self.running:
self.running = False
self.start_button.config(state=tk.NORMAL)
self.pause_button.config(state=tk.DISABLED)
if self.timer:
self.timer.cancel()
# 重置按钮
def reset_countdown(self):
self.running = False
if self.timer:
self.timer.cancel()
self.start_button.config(state=tk.NORMAL)
self.pause_button.config(state=tk.DISABLED)
self.hour_var.set("0")
self.min_var.set("0")
self.sec_var.set("0")
self.hour_entry.config(state='normal')
self.min_entry.config(state='normal')
self.sec_entry.config(state='normal')
self.reset_Canvas()
self.angle = 359.99
def countdown(self):
if self.running and self.total_seconds > 0:
h, m = divmod(self.total_seconds, 3600)
m, s = divmod(m, 60)
self.hour_var.set(str(h))
self.min_var.set(str(m))
self.sec_var.set(str(s))
self.update_Canvas(f"{h:02d}:{m:02d}:{s:02d}")
self.total_seconds -= 1
self.root.after(1000, self.countdown)
else:
self.running = False
self.start_button.config(state=tk.NORMAL)
self.pause_button.config(state=tk.DISABLED)
if self.total_seconds == 0:
self.reset_countdown()
# 清除并重新绘制弧形
self.cv.delete(self.cv_arc)
self.cv_arc = self.cv.create_arc(100, 50, 350, 300, start=90, extent=0, fill="red",outline='yellow')
winsound.Beep(1000, 500) # 频率1000Hz，持续500毫秒
messagebox.showinfo("倒计时", "时间已到！")
# 以下Canvas绘图模块参考自CSDN: Python动画制作：90秒倒计时圆形进度条效果(http://t.csdnimg.cn/LO2uz)
def update_Canvas(self, time_str = "00:00:00"):
if self.running:
self.angle_step = 360 / self.count
# 清除并重新绘制弧形
if self.count == self.total_seconds:
self.cv.delete(self.cv_arc)
self.cv_arc = self.cv.create_arc(100, 50, 350, 300, start=90, extent=359.99, fill="red",outline='yellow')
else:
self.cv.delete(self.cv_arc)
self.cv_arc = self.cv.create_arc(100, 50, 350, 300, start=90, extent=self.angle, fill="red", outline='yellow')
self.angle -= self.angle_step
# 绘制内部圆形和计数文本
self.cv.create_oval(150, 100, 300, 250, fill='yellow', outline='yellow')
self.cv.delete(self.cv_text)
self.cv_text = self.cv.create_text(225, 175, text=time_str, font=('微软雅黑', 24, 'bold'), fill='red')
def reset_Canvas(self):
self.first_star = True
# 清除并重新绘制弧形
self.cv.delete("all")
self.cv_arc = self.cv.create_arc(100, 50, 350, 300, start=90, extent=359.99, fill="red", outline='yellow')
self.cv.create_oval(150, 100, 300, 250, fill='yellow', outline='yellow')
self.cv_text = self.cv.create_text(225, 175, text="00:00:00", font=('微软雅黑', 24, 'bold'), fill='red')
if __name__ == "__main__":
root = tk.Tk()
app = CountdownApp(root)
root.mainloop()