Drawing graphics with OB

> Hi Alex,
>
>> Each OBNode understand the message definition. In the first version  
>> of
>> OB, this definition method is supposed to return an instance of
>> OBDefinition or one of its subclass.
>> I saw a way to have a graphical object instead of the text pane. What
>> is the trick to achieve this?
>
> What I did is to use OBClosableDefinitionPanel that has an  
> #exchangeContentWith:
> aMorph method where you can pass any morph that gets displayed  
> instead of the text
> that is usually there.
> We could extend that to be able to also use "visualization  
> definitions" directly in
> OBNode, but I haven't yet done this. The visualizations I added get  
> displayed on the
> execution of a command, by default there is always a text definition  
> shown that can
> get exchanged with a visualization at runtime.
>
> David
>
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