I've just spent several hours over the last two days delving into
SimpleButtonMorph and trying to understand why buttons in Morphic don't behave
the way I expected them to behave. If I have this right, it is completely
unclear to me how buttons are _suppsoed_ to be used in Morphic.

Here's what I _think_ I've learned.

A SimpleButtonMorph appears to "eat" the usual mouse events: mouseDown,
mouseUp, and mouseStillDown. It has a default "flash" behavior that it executes
on mouseUp. Even though its halo menu has an item called "add mouseUp action,"
doing so seems to have no discernible effect. Neither, for that matter, does
"remove mouseUp action." You can write a script for such a button, set it to
active on mouseUp and you can click on that sucker until your hand breaks and
nothing is going to happen. This despite the fact that when you click on the
instant-execution yellow exclamation point in the script tile, the script runs
exactly as expected every time.

I conclude, at least tentatively, that the intent is that SimpleButtonMorphs
are _not_ supposed to be buttons in the sense that _I_ at least have come to
think of them: pluggable widgets that you attach to a script to execute. It
appears to me that one would have to do some development that did not involve
only direct manipulation of Morphs to make a SimpleButtonMorph behave as I
expected.

Please note that I am neither complaining nor suggesting that my expectation
should carry the day. I am only trying to understand the reasoning behind the
design and intended use of these seductive little buttons that are so stubborn
in my world-view!

I have resorted to creating my own button-like objects out of rectangles and
text and which therefore have no default behaviors or assumptions about what
they will or will not do when clicked. As I am writing a tutorial based on this
experience, I obviously prefer to be right so if this is wrong-headed, someone
please tell me!

__________________________________________________
Do You Yahoo!?
Get email at your own domain with Yahoo! Mail. 
http://personal.mail.yahoo.com/