Grid of components

If I have a grid component which is formed of subcomponents this could
be a lot of components
it seems that it is necessary to return #children for subcomponents

Does this mean building up and keeping an array of perhaps several
hundred components in children or is there another/better way?

Keith
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I'm using a presenter superclass that answers #children for all it's
subclasses. The subclasses has to have some method (#initialize for
instance) in which you add children to the component in a way it can answer
them. I'm making like this ala Dolphin:

        SomePresenter>>createComponents
                super createComponents.
       
                self
                        at: #date put: MVPDatePresenter new;
                        at: #subject put: MVPInputTextPresenter new;
                        at: #budget put: MVPBudgetPresenter new;
                        yourself

        the superclass MVPPresenter is the only one that implements
#children and it's trivial:

                MVPPresenter>>children
               
                        ^ self components values

        #components is a dictionary in an instVar at that MVPPresenter

        may this give you ideas,

Sebastian Sastre


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2007/10/3, Keith Hodges <[hidden email]>:
> If I have a grid component which is formed of subcomponents this could
> be a lot of components
> it seems that it is necessary to return #children for subcomponents

That's true. A grid of components is no different than any other
component containing components.

> Does this mean building up and keeping an array of perhaps several
> hundred components in children or is there another/better way?

No but it doesn't have to be an array and you need to return only the
current components. Note however that you'll probably need to
backtrack the collection as well.

Cheers
Philippe

> Keith
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