At 7:33 PM -0500 10/1/01, Daniel Joyce wrote:
>	Okay, how I play a sound under Squeak?

The top of the Sound hierarchy is AbstractSound.  The process that 
actually plays sounds is in SoundPlayer.

>
>	What class is used by the system to play sounds when morphs are
>added/removed?

It's in TrashCanMorph (code at bottom).  Here's how I found it:
- I found Morph>>delete
- I looked up the Senders of that, then looked for access via 
HandMorph, since I know that HandMorph handles halos.
- Tracing from that code, I found that TrashCanMorph actually makes the sound:


>	I find it sad that for a system that supports so much easy 
>OOP, that things
>are not terribly clean, or refactored.

Fortunately, there are great tools for wandering the image.

>	A) I'd like to know the best place to look on where sounds 
>are played, and
>how they are stored in Squeak ( what's the buffer used? ).


The buffer is SoundBuffer.

You can find lots on the Sound classes in Squeak at 
http://swiki.cc.gatech.edu:8080/compMusic/ActiveEssays starting at 
the FM Synthesis essay but also including the Sampling essay.



moveToTrash: aMorph
	Preferences soundsEnabled ifTrue:
		[Preferences preserveTrash
			ifFalse:
				[self playSoundNamed: 'scratch']
			ifTrue:
				[self playDeleteSound]].

	aMorph delete.
	aMorph == Utilities scrapsBook ifFalse:
		[Utilities addToTrash: aMorph]

Mark

--------------------------
Mark Guzdial : Georgia Tech : College of Computing : Atlanta, GA 30332-0280
Associate Professor - Learning Sciences & Technologies.
Collaborative Software Lab - http://coweb.cc.gatech.edu/csl/
(404) 894-5618 : Fax (404) 894-0673 : guzdial at cc.gatech.edu
http://www.cc.gatech.edu/gvu/people/Faculty/Mark.Guzdial.html