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Re: graphics in AU
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Re: graphics in AU


  • Subject: Re: graphics in AU
  • From: Urs Heckmann <email@hidden>
  • Date: Sun, 29 Sep 2002 16:46:45 +0200

Which list is recommended for this kind of stuff? I 'seen hit-developers, carbon-developers, any idea?


Okay, I found some answers.

Now I have a knob control drawing a Quartz-based rotated png with transparent backgound. That's all fine and very comfortable.

I still can't find a way to attach the sliderTrackProc and receive Events of kEventControlTrack. Dunno what I'm missing.

Next thing would be wrapping it in a class. Is it viable to modify the AUPublic code or should I derive from there, make my own factory like AUControlGroup?

Another thing is, I experience crashes when I open the AU a second time, obviously by some uncertainty how to dispose off data I have added to the derived AUCarbonViewBase (the image, that is). Do I have to take care for superclasses when I implement a deconstructor there?

It looks like this:

class myAUView : public AUCarbonViewBase {
public:
myAUView(AudioUnitCarbonView auv) : AUCarbonViewBase(auv)
{
TestImage = GetTestImage(); // read Image from component bundle
}

~myAUView()
{
if ( TestImage != NULL )
{
CGImageRelease( TestImage );
TestImage = NULL;
}
}
virtual OSStatus CreateUI(Float32 xoffset, Float32 yoffset);
private:
CGImageRef TestImage; // my knob image
};

Will the destructor be called at all? And if so, when?

Thanks,

;) Urs
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