I'd appreciate help with the following code from anyone familiar with 
csndsugui and Python.

This (vastl,y simplified) code does not work for me in Sugar (OLPC):


import csndsugui
from sugar.activity import activity

class Waves(activity.Activity):

 def __init__(self, handle):

   activity.Activity.__init__(self, handle)

   win = csndsugui.CsoundGUI(self)

   box = win.box(True)
   win.text("Click on a version:", box)
   win.button(box, "button1", "CSD 1 ?")
   win.button(box, "button2", "CSD 2 ?")
   v1 = win.get_button_value("button1")
   v2 = win.get_button_value("button2")
   if v1:
    win.csd("CSD1.csd")
    win.button(box, "pan1", "Pan Control CSD 1?")
    win.button(box, "play1", "PLAY!")
    v1play = win.get_button_value("play1")
    if v1play: win.play()
   elif v2:
    win.csd("CSD2.csd")
    win.button("pan2", "Pan Control CSD 2?")
    win.button("play2", "PLAY!")
    v2play = win.get_button_value("play2")
    if v2play: win.play()

The problem is with my GUI code (above); I'm relatively sure of what I'm 
doing with my .csd's, including their chnexport statements. I suspect the 
problems are with the v1 and v2 variables, as well as v1play and v2play 
above.

The idea of the code is this: "button1" and "button2" wait for the user to 
press one - which selects the .csd to be performed. I'm completely unaware 
of how this API button_value may behave when a .csd is not yet compiled (as 
it is as yet unchosen).

The play1 and play2 buttons also don't perform. The two pan controls are 
i-time variables and must be selected before play commences. Hence, play1/2 
also must sit there, waiting. Neither button currently initiates play (even 
in a completely different version of this code which does not have a 
"button1" and "button2").

Of course, what I'm trying to do may be impossible. As things stand, I do 
need two sets of GUI buttons that wait patiently for user presses before 
going on, and this is what I don't know how to do. FWIW, I've tried many 
variants of the above - including testing direct returns from the buttons, 
and designating v1/v2, for example, as win.v1 (or win.v2).

TIA for a rescue (OLPCsound, not economic) -

Art Hunkins

I think you probably want a different method: callback button. See
the midi example at
http://git.sugarlabs.org/projects/csndsugui/repos/mainline/blobs/master/Playmidi.activity/playmidi.py

this line creates a callback button, which is used to load a CSD with
a particular midifile and create some play buttons etc.:

self.but = win.cbbutton(bbox, self.fcall, "load")

Victor

----- Original Message ----- 
From: "Art Hunkins" 
To: 
Sent: Thursday, April 02, 2009 10:08 PM
Subject: [Csnd] More csndsugui


> I'd appreciate help with the following code from anyone familiar with 
> csndsugui and Python.
>
> This (vastl,y simplified) code does not work for me in Sugar (OLPC):
>
>
> import csndsugui
> from sugar.activity import activity
>
> class Waves(activity.Activity):
>
> def __init__(self, handle):
>
>   activity.Activity.__init__(self, handle)
>
>   win = csndsugui.CsoundGUI(self)
>
>   box = win.box(True)
>   win.text("Click on a version:", box)
>   win.button(box, "button1", "CSD 1 ?")
>   win.button(box, "button2", "CSD 2 ?")
>   v1 = win.get_button_value("button1")
>   v2 = win.get_button_value("button2")
>   if v1:
>    win.csd("CSD1.csd")
>    win.button(box, "pan1", "Pan Control CSD 1?")
>    win.button(box, "play1", "PLAY!")
>    v1play = win.get_button_value("play1")
>    if v1play: win.play()
>   elif v2:
>    win.csd("CSD2.csd")
>    win.button("pan2", "Pan Control CSD 2?")
>    win.button("play2", "PLAY!")
>    v2play = win.get_button_value("play2")
>    if v2play: win.play()
>
> The problem is with my GUI code (above); I'm relatively sure of what I'm 
> doing with my .csd's, including their chnexport statements. I suspect the 
> problems are with the v1 and v2 variables, as well as v1play and v2play 
> above.
>
> The idea of the code is this: "button1" and "button2" wait for the user to 
> press one - which selects the .csd to be performed. I'm completely unaware 
> of how this API button_value may behave when a .csd is not yet compiled 
> (as it is as yet unchosen).
>
> The play1 and play2 buttons also don't perform. The two pan controls are 
> i-time variables and must be selected before play commences. Hence, 
> play1/2 also must sit there, waiting. Neither button currently initiates 
> play (even in a completely different version of this code which does not 
> have a "button1" and "button2").
>
> Of course, what I'm trying to do may be impossible. As things stand, I do 
> need two sets of GUI buttons that wait patiently for user presses before 
> going on, and this is what I don't know how to do. FWIW, I've tried many 
> variants of the above - including testing direct returns from the buttons, 
> and designating v1/v2, for example, as win.v1 (or win.v2).
>
> TIA for a rescue (OLPCsound, not economic) -
>
> Art Hunkins
>
>
>
> Send bugs reports to this list.
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe 
> csound"