2011/9/11 Nicolas Cellier <nicolas.cellier.aka.nice at gmail.com>:
> I add a commercial software where I could do this.

s/I add/I had/

> The idea is to have a tree representing the expression
>
> (1+2/3)*4
>
> Assuming your infix expression used usual mathematical precedence,
> you have a tree MultiplyExpression( AddExpression( 1 ,
> DivideExpression( 2 , 3 ) ) , 4)
>
> Then you can have a printer of the tree using the visitor pattern.
> This way, you can have code generation output (C, Matlab etc...) of
> your mathematical expression, LaTeX being just one special case, and
> Morph composition just another one.
> As long as you do not deal with page layout, the composition is quite
> straight forward...
>
> MorphComposer>>visitDivideExpression: aDivideExpression
>    numeratorMorph := aDivideExpression numerator iterateFromVisitor: self.
>    denominatorMorph := aDivideExpression denominator iterateFromVisitor: self.
>    fractionBar := (numeratorMorph width max: denominatorMorph width)
> + self extraWidth.
>   some more code to create a composite morph with correct alignment...
>
> Nicolas
>
> 2011/9/11 Gary Dunn <garydunnhi at gmail.com>:
>> I use Lyx on top of LaTeX, then export to image which can be imported into
>> Squeak. All very manual. I recall seeing where someone was piping through
>> LaTeX to do the job on the fly. I should think that would produce a print
>> file easily, a bit harder to make a little illustration for on-screen,
>> interactive use.
>>
>> Gary Dunn
>> Open Slate Project
>> http://openslate.org
>>
>> On Sep 11, 2011 4:43 AM, "Nick Chen" <nchen.dev at mac.com> wrote:
>>
>> Hi
>>
>> (Cross-posted to the
>> http://forum.world.st/Simple-math-editor-typesetter-td3805250.html Pharo
>> mailing list  because that's what I'm using primarily
>> but I'm also interested in packages that work in Squeak)
>>
>> I'm working with some simple math equations and am looking for a nicer way
>> to
>> display them. Is there any existing work that I might be able to
>> re-use/build
>> upon?
>>
>> For instance, given this equation, (1+2/3)*4 I would like to see it
>> displayed
>> like the Equation Editor in Microsoft Word or the equations in a Mathematica
>> notebook. See attached screenshots:
>>
>> http://forum.world.st/file/n3805256/word.png
>>
>> http://forum.world.st/file/n3805256/mathematica.png
>>
>> I'm not looking for anything fancy. Something simple to get me started would
>> be helpful as well.
>>
>> I looked briefly at Dr. Geo but I don't think it supports displaying
>> equations in that
>> manner.
>>
>> Thanks!
>>
>> --
>> Nick
>>
>> --
>> View this message in context:
>> http://forum.world.st/Simple-math-editor-typesetter-tp3805256p3805256.html
>> Sent from the Squeak - Dev mailing list archive at Nabble.com.
>>
>>
>>
>>
>>
>