demo_python27_gdi_with_Tkinter.py

#=========================================================================================
#  Author: Thitipong Samranvanich 
#  Since: 25/05/2017
#  Platform: Windows10 + Python27  , Editor notepad 
#  ProgramDesc :    DEMO Draw Circle from 1 degree to 360 degree  / Simple Animation 
#  NOTE:  Upgrade pip by  
#                c:\Python27\python.exe  -m pip install --upgrade pip 
# 
#=========================================================================================
#== REFERENCE
#== https://stackoverflow.com/questions/459083/how-do-you-run-your-own-code-alongside-tkinters-event-loop 
#== https://stackoverflow.com/questions/2400262/how-to-create-a-timer-using-tkinter
#== https://www.tutorialspoint.com/python/tk_canvas.htm
#== https://stackoverflow.com/questions/459083/how-do-you-run-your-own-code-alongside-tkinters-event-loop
#== https://stackoverflow.com/questions/423379/using-global-variables-in-a-function-other-than-the-one-that-created-them

import Tkinter as tk
#import threading
import time
root = tk.Tk()
root.wm_title("Demo/Test TK GDI")
num = 0 
def task():
	global num, C 
	num = num+1
	if num >360 :
		num =1
		C.delete("all")
	print("hello " , num )
	coord = 10, 50, 240, 210
	arc = C.create_arc(coord, start=0, extent=num, fill="red")
	C.pack()
	root.label.configure(text="degree=%d"%(num))   #modify fix in version 2 
	#== NEXT LOOP 
	root.after(10,task)

C = tk.Canvas(root, bg="lightblue", height=250, width=300)
root.label = tk.Label(text="label1")
root.label.pack()
root.after(1000,task)
root.mainloop()