# Example 11 - Graphical User Interfaces

# Author: Steven Yi <stevenyi@gmail.com>

# 2013.10.28

#

# This example demonstrates a minimal Graphical User Interface application.

# The setup of Csound and starting of the CsoundPerformanceThread is done in

# the global scripting space. Afterwards, a Tkinter GUI is created that has

# one button. The button's callback (the command action) routes to a function

# that just sends an event to Csound.

#

# For this example, since there is no need to synchronize continous channel data

# changes with Csound, it is more efficient to use the CsoundPerformanceThread,

# as it is a native thread. We use the CsoundPerformanceThread's InputMessage()

# function to ensure that the message is processed in a thread-safe manner.

from Tkinter import *

import csnd6

from random import randint, random

###############################

# Our Orchestra for our project

orc = """

sr=44100

ksmps=32

nchnls=2

0dbfs=1

instr 1

kenv linsegr 0, .05, 1, .05, .9, .8, 0

aout vco2 p4 * kenv, p5

aout moogladder aout, 2000, p6

outs aout, aout

endin"""

c = csnd6.Csound() # create an instance of Csound

c.SetOption("-odac") # Set option for Csound

c.SetOption("-m7") # Set option for Csound

c.CompileOrc(orc) # Compile Orchestra from String

c.Start() # When compiling from strings, this call is necessary before doing any performing

perfThread = csnd6.CsoundPerformanceThread(c)

perfThread.Play()

class Application(Frame):

def __init__(self,master=None):

master.title("Csound API GUI Example")

self.items = []

self.notes = []

Frame.__init__(self,master)

self.pack()

self.createUI()

self.master.protocol("WM_DELETE_WINDOW", self.quit)

def createUI(self):

self.size = 600

self.canvas = Canvas(self,height=self.size,width=self.size,bg="darkgray")

self.canvas.pack()

# create button and setup the playNote() callback

self.button = Button(self.canvas, text='Play Note', command=self.playNote)

self.button.pack()

def playNote(self):

perfThread.InputMessage("i1 0 2 .5 400 .25")

def quit(self):

self.master.destroy()

perfThread.Stop()

perfThread.Join()

app = Application(Tk())

app.mainloop()