glamour tree children by level

Hi,

I added the possibility to specify the children of a tree also based  
on the level at which the item resides.

An example can be found here:
GLMBasicExamples>>treeWithChildrenByLevel

Stef, this solves a problem of easily showing both categories and  
selectors (both being represented by symbols) in the same tree :).

Cheers,
Doru


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this is really cool.

Stef

On Apr 18, 2010, at 11:46 PM, Tudor Girba wrote:


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Very cool indeed, I can use that.

What do I do if I have different kinds of objects per level?

Lukas

On 19 April 2010 10:49, Stéphane Ducasse <[hidden email]> wrote:


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Hi Lukas,

On 19 Apr 2010, at 10:52, Lukas Renggli wrote:

> Very cool indeed, I can use that.
>
> What do I do if I have different kinds of objects per level?

You have to take care of that somehow in the children block. The level  
option is one possibility to distinguish between objects. Another one  
is a "isKindOf:", but that you can do yourself. It would be  
interesting to offer other means of mapping (maybe something that  
builds a map behind the scene), but I would not know how to do that.  
If you have ideas, I would be happy to hear them :).

Cheers,
Doru


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>> Very cool indeed, I can use that.
>>
>> What do I do if I have different kinds of objects per level?
>
> You have to take care of that somehow in the children block. The level
> option is one possibility to distinguish between objects. Another one is a
> "isKindOf:", but that you can do yourself.

Aha, ok. I was quickly looking at the code but couldn't figure out how
the specification of the different selectors at different levels
worked :-)

> It would be interesting to offer
> other means of mapping (maybe something that builds a map behind the scene),
> but I would not know how to do that. If you have ideas, I would be happy to
> hear them :).

I was thinking/expecting more something along a meta-model for trees.

For now I guess the current implementation is fine, I just need to
implement some unique selector in all the objects that will be part of
the tree that returns their children.

Lukas

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Hi,

On 20 Apr 2010, at 09:08, Lukas Renggli wrote:

Yes, when you have distinct types you can just either dispatch to  
them, or use an isKindOf: as a shortcut. The problem comes when you do  
not have distinct types (for various strange reasons) but you still  
want to treat the objects differently.

What do you mean by a meta-model for trees? This is what the children:  
block does. What else would you like?

Cheers,
Doru

> Lukas
>
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> www.lukas-renggli.ch
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