Code: Select all

#. Version 1. root.mainloop()
import tkinter as tk
from datetime import datetime
import time
from rpi_lcd import LCD
lcd = LCD()
ct=1
 
root = tk.Tk()
root.geometry("500x200+250+30") # size then position
root.title("System Stats display on LCD")
 
tk.Label(root, text="System Stats now on display. \nClick Quit to go back to Choice Menu").grid(row=1,column = 0,sticky=tk.W, padx = 20, pady=40)
tk.Button(root, text='Quit', command=root.quit).grid(row=3, column=0,padx=250, pady=10)
 
 # while True:
now = datetime.now()
clockdis = " " +str(now.strftime("%H:%M"))
lcd.text(clockdis,1)
 
if ct==1:
 ast = " "
 lcd.text("Running" + ast ,2)
 ct=0
else:
 ast = " *"
 lcd.text("Running" + ast ,2)
 ct = 1 
 
time.sleep(0.3 )
root.mainloop()
''''
NOTES
Runs and Tk Window appears
Quit button works as it should. So the window is working as it should. 
BUT LCD Display updates only once, presumably as no looping?
My solution was to use 'while True:' to create a loop. See other code for result
'''

Code: Select all

# VERSION 2. while True:
import tkinter as tk
from datetime import datetime
import time
from rpi_lcd import LCD
lcd = LCD()
ct=1
 
root = tk.Tk()
root.geometry("500x200+250+30") # size then position
root.title("System Stats display on LCD")
 
tk.Label(root, text="System Stats now on display. \nClick Quit to go back to Choice Menu").grid(row=1,column = 0,sticky=tk.W, padx = 20, pady=40)
tk.Button(root, text='Quit', command=root.quit).grid(row=3, column=0,padx=250, pady=10)
 
while True:
 now = datetime.now()
 clockdis = " " +str(now.strftime("%H:%M"))
 lcd.text(clockdis,1)
 
 root.update() #without this the tkinter window does not appear. Not sure why!
 
 if ct==1:
 ast = " "
 lcd.text("Running" + ast ,2)
 ct=0
 else:
 ast = " *"
 lcd.text("Running" + ast ,2)
 ct = 1 
 
 time.sleep(0.3 )
 #root.mainloop()
'''
NOTES
Runs and Tk Window appears
Quit button does NOT work, though it sometimes changes colour on hover & depresses when clicked. 
I have to use the terminal window which also opens, and close that or Ctrl-C, to quit 
LCD Display updates as required, with flashing asterisk to show activity. So this part is doing what I want.
'''