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#!/usr/bin/python
#####################################
# oscilloscope example
#
# VL, 01/07
from sndobj import *
from Tkinter import *
import display
import array
# window size, refresh interval and norm factor
window_size = 300
time_interval = 0.1
norm = 32768.0
# display callback
def callb(data):
sig = array.array('f')
osc = data[0]
disp = data[1]
for i in range(0,osc.GetVectorSize()):
sig.append(osc.Output(i)/norm)
disp.draw(sig,time_interval*osc.GetSr())
# SndObj chain and process thread
harm = HarmTable(10000,1,1)
mod = Oscili(harm, 10, 10000)
osc = Oscili(harm, 400, 0)
outp = SndRTIO(1, SND_OUTPUT, 4096)
outp.SetOutput(1, osc)
thread = SndThread()
# display object
master = Tk()
disp = display.Oscilloscope(master, window_size, thread.ProcOff, "green", "black")
dat = (osc,disp)
# thread set-up
thread.SetProcessCallback(callb, dat)
thread.AddObj(mod)
thread.AddObj(osc)
thread.AddObj(outp, SNDIO_OUT)
thread.ProcOn()
# switch the sound after 2.5 s
master.after(2500, osc.SetAmp,10000,mod)
# run the display
disp.mainloop()
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