I am trying to create a GUI using Tkinter with Python 2.7. This must have a seven segment display or something similar to dynamically display values in accordance with a var
I don't know what you mean by 'maunal graphical design' but here is a single hex diget display designed to be easily upgraded to more digits. It will not slow the system noticeably.
'''Seven segment display of hex digits.'''
import tkinter as tk
root = tk.Tk()
screen = tk.Canvas(root)
screen.grid()
# Order 7 segments clockwise from top left, with crossbar last.
# Coordinates of each segment are (x0, y0, x1, y1)
# given as offsets from top left measured in segment lengths.
offsets = (
(0, 0, 1, 0), # top
(1, 0, 1, 1), # upper right
(1, 1, 1, 2), # lower right
(0, 2, 1, 2), # bottom
(0, 1, 0, 2), # lower left
(0, 0, 0, 1), # upper left
(0, 1, 1, 1), # middle
)
# Segments used for each digit; 0, 1 = off, on.
digits = (
(1, 1, 1, 1, 1, 1, 0), # 0
(0, 1, 1, 0, 0, 0, 0), # 1
(1, 1, 0, 1, 1, 0, 1), # 2
(1, 1, 1, 1, 0, 0, 1), # 3
(0, 1, 1, 0, 0, 1, 1), # 4
(1, 0, 1, 1, 0, 1, 1), # 5
(1, 0, 1, 1, 1, 1, 1), # 6
(1, 1, 1, 0, 0, 0, 0), # 7
(1, 1, 1, 1, 1, 1, 1), # 8
(1, 1, 1, 1, 0, 1, 1), # 9
(1, 1, 1, 0, 1, 1, 1), # 10=A
(0, 0, 1, 1, 1, 1, 1), # 11=b
(1, 0, 0, 1, 1, 1, 0), # 12=C
(0, 1, 1, 1, 1, 0, 1), # 13=d
(1, 0, 0, 1, 1, 1, 1), # 14=E
(1, 0, 0, 0, 1, 1, 1), # 15=F
)
class Digit:
def __init__(self, canvas, *, x=10, y=10, length=20, width=3):
self.canvas = canvas
l = length
self.segs = []
for x0, y0, x1, y1 in offsets:
self.segs.append(canvas.create_line(
x + x0*l, y + y0*l, x + x1*l, y + y1*l,
width=width, state = 'hidden'))
def show(self, num):
for iid, on in zip(self.segs, digits[num]):
self.canvas.itemconfigure(iid, state = 'normal' if on else 'hidden')
dig = Digit(screen)
n = 0
def update():
global n
dig.show(n)
n = (n+1) % 16
root.after(1000, update)
root.after(1000, update)
root.mainloop()