[Cuis-dev] Greetings and a couple of questions from a newbie

[Luciano Notarfrancesco]

I think Juan fixed this last week. Maybe you just need to update?

On Mon, Feb 16, 2026 at 06:34 David Gouge via Cuis-dev <
cuis-dev at lists.cuis.st> wrote:

> Hi Ken,
>
> Thanks for the quick response! You're explanation of the code is indeed
> very helpful. It's going to take me a while to stop thinking in C++ lingo.
> I'm an old dog and like they say... We take a while to learn new tricks.
>
> Let me state my observation in a simpler way:
>
> Using the older Cuis University image, 1) I can copy that example code
> into a Workspace. 2) doIt 3) Enter my name in the text field and 4) press
> the Greet button. Everything works fine in the older image.
>
> Using the newer rolling release image, I do the same thing and it halts
> after the button press and brings up the debugger.
>
> In the older image (which works properly) the LabelMorph >>
> contents:newContents selector did not try to set it's own color instantance
> var to be the same as newContents colorAt: 1. This appears to be a newer
> modification to the LabelMorph>>contents: implementation. Using the example
> in the new image, newContents colorAt: 1 evaluates to nil which in turn
> causes the LabelMorph>> onDraw message to send aCanvas
> >>drawString:at:font:color a nil for the color. This is where it halts in
> the debugger.
>
> I guess that I was just wanting to know if it would be idiomatic to test
> for nil before the assignment of color in the LabelMorph>>contents
> selector. In my C++ mind it would indeed be idiomatic and not doing so
> would be a bug. Just trying to learn how you smalltalk'ers think.
>
> Thanks for your help on this!
> -Dave
>
> Sent from Proton Mail for Android.
>
> -------- Original Message --------
> On Sunday, 02/15/26 at 14:15 ken.dickey--- via Cuis-dev <
> cuis-dev at lists.cuis.st> wrote:
> On 2026-02-15 09:52, David Gouge via Cuis-dev wrote:
>
> > In the code example, the greetingLabel instance is explicitly sent the
> > 'color: Color: red' message after creation.
>
> Quick note:
>
>   <greetLabel> color: Color red
>
> Should work.  #Color: is not a selector.  #Color (no colon) refers to
> the Color class.
>
> Syntax highlighting in the Workspace window should clue here.
>
> I note that LabelMorph>>contents: checks for and handles #Text.
>
> The 'Color red' invokes the Color>>red method [Browse _Class_ Color,
> method #red].
>
> HTH,
> -KenD
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