import tkinter as tk
import time
from datetime import datetime
HTML_FILE = "countdown.html"
def write_html(mission_name, timer_text):
html = f"""
{mission_name}
{timer_text}
"""
with open(HTML_FILE, "w", encoding="utf-8") as f:
f.write(html)
class CountdownApp:
def __init__(self, root):
self.root = root
self.root.title("RocketLaunchCountdown")
self.root.config(bg="black")
self.root.attributes("-topmost", True)
# State
self.running = False
self.on_hold = False
self.scrubbed = False
self.counting_up = False
self.target_time = None
self.hold_start_time = None
self.remaining_time = 0
self.mission_name = "Mission"
# Display
self.text = tk.Label(
root,
text="T-00:00:00",
font=("Consolas", 80, "bold"),
fg="white",
bg="black"
)
self.text.pack(padx=50, pady=20)
# Mission name input
frame_top = tk.Frame(root, bg="black")
frame_top.pack(pady=5)
tk.Label(frame_top, text="Mission Name:", fg="white", bg="black").pack(side="left")
self.mission_entry = tk.Entry(frame_top, width=20, font=("Arial", 18))
self.mission_entry.insert(0, self.mission_name)
self.mission_entry.pack(side="left")
# Mode toggle
frame_mode = tk.Frame(root, bg="black")
frame_mode.pack(pady=5)
self.mode_var = tk.StringVar(value="duration")
tk.Radiobutton(frame_mode, text="Duration", variable=self.mode_var, value="duration",
fg="white", bg="black", command=self.update_inputs).pack(side="left", padx=5)
tk.Radiobutton(frame_mode, text="Clock Time", variable=self.mode_var, value="clock",
fg="white", bg="black", command=self.update_inputs).pack(side="left", padx=5)
# Duration inputs
frame_duration = tk.Frame(root, bg="black")
frame_duration.pack(pady=5)
tk.Label(frame_duration, text="H", fg="white", bg="black").pack(side="left")
self.hours_entry = tk.Entry(frame_duration, width=3, font=("Arial", 18))
self.hours_entry.insert(0, "0")
self.hours_entry.pack(side="left", padx=2)
tk.Label(frame_duration, text="M", fg="white", bg="black").pack(side="left")
self.minutes_entry = tk.Entry(frame_duration, width=3, font=("Arial", 18))
self.minutes_entry.insert(0, "5")
self.minutes_entry.pack(side="left", padx=2)
tk.Label(frame_duration, text="S", fg="white", bg="black").pack(side="left")
self.seconds_entry = tk.Entry(frame_duration, width=3, font=("Arial", 18))
self.seconds_entry.insert(0, "0")
self.seconds_entry.pack(side="left", padx=2)
# Clock time input
frame_clock = tk.Frame(root, bg="black")
frame_clock.pack(pady=5)
tk.Label(frame_clock, text="HH:MM", fg="white", bg="black").pack(side="left")
self.clock_entry = tk.Entry(frame_clock, width=7, font=("Arial", 18))
self.clock_entry.insert(0, "14:00")
self.clock_entry.pack(side="left", padx=5)
# Control buttons
frame_buttons = tk.Frame(root, bg="black")
frame_buttons.pack(pady=10)
self.start_btn = tk.Button(frame_buttons, text="▶ Start", command=self.start, font=("Arial", 14))
self.start_btn.grid(row=0, column=0, padx=5)
# Hold and resume share the same position
self.hold_btn = tk.Button(frame_buttons, text="⏸ Hold", command=self.hold, font=("Arial", 14))
self.hold_btn.grid(row=0, column=1, padx=5)
self.resume_btn = tk.Button(frame_buttons, text="⏵ Resume", command=self.resume, font=("Arial", 14))
self.resume_btn.grid(row=0, column=1, padx=5)
self.resume_btn.grid_remove() # hidden at start
self.scrub_btn = tk.Button(frame_buttons, text="🚫 Scrub", command=self.scrub, font=("Arial", 14), fg="red")
self.scrub_btn.grid(row=0, column=2, padx=5)
self.reset_btn = tk.Button(frame_buttons, text="⟳ Reset", command=self.reset, font=("Arial", 14))
self.reset_btn.grid(row=0, column=3, padx=5)
self.update_inputs()
self.update_clock()
# ----------------------------
# Update input visibility based on mode
# ----------------------------
def update_inputs(self):
if self.mode_var.get() == "duration":
self.hours_entry.config(state="normal")
self.minutes_entry.config(state="normal")
self.seconds_entry.config(state="normal")
self.clock_entry.config(state="disabled")
else:
self.hours_entry.config(state="disabled")
self.minutes_entry.config(state="disabled")
self.seconds_entry.config(state="disabled")
self.clock_entry.config(state="normal")
# ----------------------------
# Control logic
# ----------------------------
def start(self):
self.mission_name = self.mission_entry.get().strip() or "Mission"
self.running = True
self.on_hold = False
self.scrubbed = False
self.counting_up = False
self.show_hold_button()
try:
if self.mode_var.get() == "duration":
h = int(self.hours_entry.get())
m = int(self.minutes_entry.get())
s = int(self.seconds_entry.get())
total_seconds = h * 3600 + m * 60 + s
else:
now = datetime.now()
parts = [int(p) for p in self.clock_entry.get().split(":")]
h, m = parts[0], parts[1]
s = parts[2] if len(parts) == 3 else 0
target_today = now.replace(hour=h, minute=m, second=s, microsecond=0)
if target_today < now:
target_today = target_today.replace(day=now.day + 1)
total_seconds = (target_today - now).total_seconds()
except Exception:
self.text.config(text="Invalid time")
write_html(self.mission_name, "Invalid time")
return
self.target_time = time.time() + total_seconds
self.remaining_time = total_seconds
def hold(self):
if self.running and not self.on_hold and not self.scrubbed:
self.on_hold = True
self.hold_start_time = time.time()
self.remaining_time = max(0, self.target_time - self.hold_start_time)
self.show_resume_button()
def resume(self):
if self.running and self.on_hold and not self.scrubbed:
self.on_hold = False
self.target_time = time.time() + self.remaining_time
self.show_hold_button()
def show_hold_button(self):
self.resume_btn.grid_remove()
self.hold_btn.grid()
def show_resume_button(self):
self.hold_btn.grid_remove()
self.resume_btn.grid()
def scrub(self):
self.scrubbed = True
self.running = False
write_html(self.mission_name, "SCRUB")
self.text.config(text="SCRUB")
def reset(self):
self.running = False
self.on_hold = False
self.scrubbed = False
self.counting_up = False
self.text.config(text="T-00:00:00")
write_html(self.mission_name, "T-00:00:00")
self.show_hold_button()
# ----------------------------
# Clock updating
# ----------------------------
def format_time(self, seconds, prefix="T-"):
h = int(seconds // 3600)
m = int((seconds % 3600) // 60)
s = int(seconds % 60)
return f"{prefix}{h:02}:{m:02}:{s:02}"
def update_clock(self):
if self.running and not self.scrubbed:
now = time.time()
if self.on_hold:
elapsed = int(now - self.hold_start_time)
timer_text = self.format_time(elapsed, "H+")
elif self.target_time:
diff = int(self.target_time - now)
if diff <= 0 and not self.counting_up:
self.counting_up = True
self.target_time = now
diff = 0
if self.counting_up:
elapsed = int(now - self.target_time)
timer_text = self.format_time(elapsed, "T+")
else:
timer_text = self.format_time(diff, "T-")
else:
timer_text = "T-00:00:00"
else:
timer_text = self.text.cget("text")
self.text.config(text=timer_text)
write_html(self.mission_name, timer_text)
self.root.after(200, self.update_clock)
if __name__ == "__main__":
root = tk.Tk()
app = CountdownApp(root)
write_html("Mission", "T-00:00:00")
root.mainloop()