[Cuis-dev] SVGs and using reflection to call class methods

[Mark Volkmann]

Here are my notes on working with SVGs in Cuis:

- Open a terminal.

- Clone the following Git repositories from Cuis Smalltalk:

  - https://github.com/Cuis-Smalltalk/Numerics.git
  - https://github.com/Cuis-Smalltalk/SVG.git

- Open a Workspace window and install the packages `LinearAlgebra` and `SVG.

  For each package, enter `Feature require: '{package-name}'` and "Do it".

- Enter `SVGMainMorph exampleTiger openInWorld` and "Do it".

Now that I have this working, I wanted to see if I could use reflection
to open all the examples.
I know I can just do this: SVGMainMorph openAllExamples SVGMainMorph.
But I wanted to see if I could do it with reflection. Here is what I tried.

metaclass := SVGMainMorph class.
selectors := metaclass allMethodsInCategory: #examples.
selectors do: [ :selector |
    (selector beginsWith: 'example') ifTrue: [
        (MessageSend receiver: metaclass selector: selector) openInWorld
    ]
].

This gives me "MessageNotUnderstood" on the send of openInWorld because
apparently the code "MessageSend receiver: metaclass selector: selector"
does not return a Morph. It's not clear to me why it doesn't.


-- 
R. Mark Volkmann
Object Computing, Inc.
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