Drawing Analog clock dial and hour numbers in Tkinter canvas

    x1=x+ratio*r1*math.sin(in_radian)
    y1=y-ratio*r1*math.cos(in_radian)
    x2=x+r1*math.sin(in_radian)
    y2=y-r1*math.cos(in_radian)

Drawing Analog clock on Tkinter Canvas by showing dial and hour numbers and minute segment markings

variables	Details
r1:	distance from center ( x, y) to outer edge of the lines ( each line shows one second or one minute )
ratio	fraction of full length ( of r1 ) to get x2 and y2. Higer ratio mean small length of lines. This length is more ( less value of ratio ) for all lines after 5 intervals.
x,y	Center coordinates. Here x = fraction of full length ( of r1 ) to get x2 and y2. Higer ratio mean small length of lines. This length is more ( less value of ratio ) for all lines after 5 intervals.
x1,y1	Inner edge coordinates of segment lines.
x2,y2	Outer edge coordinates of segment lines.
in_degree	Angle in degree. Each segment is 6 degree so to draw the next line the value of in_degree has to be incremented by 6
in_radian	Inputs to sin() and cos() functions value in radian. Value in degree is converted to radian before using with sin() or cos() functions.

Segments in circle

We have to draw 60 segments within 360 degrees or full circle. Each segment will be drawn after 6 degree of previous segment. Our for loop will start from 0 and will continue till 59. In each step there will be an increment of 6 degree.

for i in range(0,60):
.....
.....
	in_degree=in_degree+6 # increment for next segment

Angles in Radians

Before using the angle value as input to sin() or cos() functions we have to convert them to radian.

in_radian = math.radians(in_degree) # converting to radian

Inside our clock we can see that each 5th segment is longer than the other segments. For this we will change the ratio value for each fifth segment.

if(i%5==0): 
        ratio=0.85 # Long marks ( lines )
        t1=x+r2*math.sin(in_radian) # coordinate to add text ( hour numbers )
        t2=x-r2*math.cos(in_radian) # coordinate to add text ( hour numbers )
        c1.create_text(t1,t2,fill='blue',font="Times 30  bold",text=next(h)) # number added
    else:
        ratio=0.9 # small marks ( lines )

Adding text for each hours

One iterater object h is created with all numbers and each iteration one number is collected and displayed. As we are staring from 0 angle so the first element is 12.

h=iter(['12','1','2','3','4','5','6','7','8','9','10','11'])

We will be adding hour numbers to each 5^th segment. This number is displayed at a distance r2 from the center of the clock. Here the style of the text can be changed by using font options.

    if(i%5==0): 
        ratio=0.85 # Long marks ( lines )
	t1=x+r2*math.sin(in_radian) # coordinate to add text ( hour numbers )
        t2=x-r2*math.cos(in_radian) # coordinate to add text ( hour numbers )
        c1.create_text(t1,t2,fill='blue',font="Times 30  bold",text=next(h)) # number added
    else:
        ratio=0.9 # small marks ( lines )

segments with hour numbers in Dial of Analog Clock

Full code is here

import math
import tkinter as tk
import time

my_w = tk.Tk()
#my_w.tk.call('tk', 'scaling',200)
width,height=410,410 # set the variables 
c_width,c_height=width-5,height-5 # canvas width height
d=str(width)+"x"+str(height)
my_w.geometry(d) 
c1 = tk.Canvas(my_w, width=c_width, height=c_height,bg='lightgreen')
c1.grid(row=0,column=0,padx=5,pady=5,columnspan=3)
dial=c1.create_oval(10, 10, 400, 400,width=10,outline='#FF0000',fill='#FFFFFF')
x,y=205,205 # center 
x1,y1,x2,y2=x,y,x,10 # second needle 
center=c1.create_oval(x-8,y-8,x+8,y+8,fill='#c0c0c0')
r1=180 # dial lines for one minute 
r2=130 # for hour numbers  before the lines 
in_degree = 0
h=iter(['12','1','2','3','4','5','6','7','8','9','10','11'])
for i in range(0,60):
    in_radian = math.radians(in_degree) # converting to radian
    if(i%5==0): 
        ratio=0.85 # Long marks ( lines )
        t1=x+r2*math.sin(in_radian) # coordinate to add text ( hour numbers )
        t2=x-r2*math.cos(in_radian) # coordinate to add text ( hour numbers )
        c1.create_text(t1,t2,fill='blue',font="Times 30  bold",text=next(h)) # number added
    else:
        ratio=0.9 # small marks ( lines )
    
    x1=x+ratio*r1*math.sin(in_radian)
    y1=y-ratio*r1*math.cos(in_radian)
    x2=x+r1*math.sin(in_radian)
    y2=y-r1*math.cos(in_radian)
    c1.create_line(x1,y1,x2,y2,width=1) # draw the line for segment
    in_degree=in_degree+6 # increment for next segment

my_w.mainloop()

Part II : Full Clock with Source code

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Subhendu Mohapatra

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Analog Clock Dial

Segments in circle

Angles in Radians

Adding text for each hours

Subhendu Mohapatra