[Cuis-dev] Question about PlacedMorph

[Alexandre Rousseau]

That makes sense. Thanks.

...

Subclassing PlacedMorph was a mistake in my case. I was better off, again,
subclassing LayoutMorph, ending up with this hierarchy:

LayoutMorph (self)
> - BoxMorph (lightBox)
> -- LayoutMorph (lightBoxLayout)
> --- BoxMorph (redLight)
> --- BoxMorph (yellowLight)
> --- BoxMorph (greenLight)


Then, calling "lightBox morphExtent: lightBoxLayout minimumExtent" was
sufficient to pack everything to perfection.

[image: Screenshot 2023-03-23 at 11.08.12 AM.png]


On Thu, Mar 23, 2023 at 10:07 AM <ken.dickey at whidbey.com> wrote:

> On 2023-03-23 06:54, Alexandre Rousseau via Cuis-dev wrote:
>
> > PlacedMorph subclass MyClass is initialized such that it contains
> > several submorphs.
> >
> > What is the simplest way, from inside initialize, to ensure that my
> > instance's extent is such that all of its submorphs are visible? (or
> > must I specify this manually via morphExtent:?)
>
> Using a LayoutMorph will do this for you.  A LayoutMorph resizes to
> contain its submorphs.
>
> You may not want the LayoutMorph placement, however.
>
> To resize the PlacedMorph yourself, see details in
> LayoutMorph>>minimumExtent
>
> HTH,
> -KneD
>
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