[sc-users] MIDIFunc to control GUI elements: strange error

[sc <mailofdjeho@xxxxxxxxx>]

Hello,

I don't understand why if I evaluate this line manually,

~myButton.valueAction = 0
~myButton.valueAction = 1

it works perfectly fine, my GUI button will go off/on and my synth 
associated with that button will play and free.

BUT

if I do this:

~cc33 = MIDIFunc.cc({|val|
    if(val == 127, {~myButton.valueAction = 1}, {~myButton.valueAction 
= 0})
}, 33, 0);

it gives me this:
ERROR: Qt: You can not use this Qt functionality in the current thread. 
Try scheduling on AppClock instead.
ERROR: Primitive '_QObject_SetProperty' failed.
Failed.

current thread? that's strange. both actions are purely SC lang side 
operations, no?
Why AppClock? I'm not scheduling anything here, I just map a simple 
function to midi control.

how you guys deal with this error? it must be possible to control QT gui 
with midi controllers, no?

thanks!

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