[Newbies] Centering text in morphic

Lawson English lenglish5 at cox.net
Thu Feb 9 16:29:16 UTC 2012

Sure. My first pass at writing code using Morphic is to see if an 
existing class does what I want and then deciding if it is worth the 
time to "roll my own" using whatever insight I got from seeing how the 
existing code works.

#drawOn should only be used if you need to do things which don't use 
exisint morphs and/or need a great deal of speed. The built-in 
composition capabilities of Morphic are usually powerful enough to 
accomplish any kind of  behavior using compositions of simpler morphs. 
Obviously, you don't create high-level paint programs using morphs as 
the pixels, but anything higher level than that is probably a good 
candidate for composition.

OTOH, if I was to write an educational program showing how line-drawing 
algorithms work, I probably WOULD use morphs as pixels. YMMV.


On 2/9/12 6:40 AM, Johann Hibschman wrote:
> Thanks, that's helpful. I don't think I'm going to use 
> SimpleButtonMorph, since it builds in a fixed margin, but reading its 
> implementation was useful. It makes a StringMorph and uses its #extent 
> to do the centering, and I can just do the same thing. (And I can just 
> look at StringMorph's #extent if I need to.) If SimpleButtonMorph 
> works by embedding a StringMorph, I think that's a sign that I should 
> do that rather than override #drawOn. Johann 
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