tkinter-buttons-radios-plot.py

#!/usr/bin/env python3

# test button & radio button generation
# test continuous plotting using tkinter timer

import tkinter as Tk
from math import pi, sin

width=600; height=400
phase=0

root = Tk.Tk()
upperframe = Tk.Frame(root)
upperframe.pack()
buttonbar = Tk.Frame(root)
buttonbar.pack()
radiobar = Tk.Frame(upperframe)
radiobar.pack(side="left", anchor="n")
graph = Tk.Canvas(upperframe, width=width, height=height + 2)
graph.pack(side="left")
abar = Tk.Frame(radiobar, bd=1, relief="raised")
abar.pack(ipady=5, fill="both")
fbar = Tk.Frame(radiobar, bd=1, relief="raised")
fbar.pack(ipady=5, fill="both")

def showgraph(*args):
    global act, phase
    amp = (avar.get() + 2) / 4.0
    freq = fvar.get() + 1
    act = args[0] if args else act
    if act == "Stop":
        return
    graph.delete("all")
    x = range(width)
    phase = (phase - 2) % width
    wav = [sin(2 * pi * (freq * n + phase) / width) for n in x]
    y = [(w * amp + 1) * height / 2 for w in wav]
    graph.create_line(list(zip(x,y)), width=2)
    if act == "Repeat":
        root.after(20,showgraph)

butnames = ["Single", "Repeat", "Stop"]
for bname in butnames:
  butcall = lambda act=bname: showgraph(act)
  Tk.Button(buttonbar, text=bname, command=butcall).pack(side="left")

avar = Tk.IntVar(value=1)
aname = ["low", "med", "high"]
Tk.Label(abar, text="Amp").pack(pady=5)
for n in range(len(aname)):
  Tk.Radiobutton(abar, variable=avar, value=n, text=aname[n]).pack(anchor="w")
  # If notification of change required, attach a "command=" callback

fvar = Tk.IntVar(value=1)
fname = ["low", "med", "high"]
Tk.Label(fbar, text="Freq").pack(pady=5)
for n in range(len(fname)):
  Tk.Radiobutton(fbar, variable=fvar, value=n, text=fname[n]).pack(anchor="w")

root.mainloop()