[Cuis-dev] question about changing instance variables in an Inspect window

[admin@stede.me admin@stede.me]

Wow, an actual answer.

> On 06/29/2024 8:23 PM EDT Vanessa Freudenberg via Cuis-dev <cuis-dev at lists.cuis.st> wrote:
>  
>  
> If you simply set the color instance variable, the morph is not redrawn. If you click the morph after, you will see that it is indeed blue. 
>  
> The #color: method takes care of both setting the instance variable and invalidating the morph so it gets redrawn automatically. 
>  
> Vanessa 
> 
> On Sat, Jun 29, 2024 at 16:45 Mark Volkmann via Cuis-dev <cuis-dev at lists.cuis.st mailto:cuis-dev at lists.cuis.st> wrote:
> 
> > Can someone explain what's going on near the end of this sequence of basic steps?
> >  
> > - Open the World menu and select "New Morph...".
> > - Select "Basic...Boxed Morph" or really any morph with a background fill color.
> >   An orange rectangle will appear, attached to the mouse cursor.
> > - Move to where you want to place it and click to drop it.
> > - cmd-click (macOS) on the morph to open its halo.
> > - Click the blue button on the top row.
> > - Select "debug...inspect morph" to open an Inspect window
> >    for the object that represents that morph.
> > - Click the `color` instance variable and note that the value is a `Color` object.
> > - Click in the bottom pane.
> > - Enter `color := Color red` and "Do it".
> > - Note that the value of the instance variable in the upper-right pane updates to `Color red`,
> >   BUT the fill color of the morph does not change.
> > - Enter `self color: Color blue` and "Do it".
> > - Note that the value of the instance variable in the upper-right pane updates to `Color blue`,
> >   AND the fill color of the morph changes to blue.
> >  
> > Why does the first approach not update the morph, but the second approach does?
> > Both update the value of the instance variable inside the Inspect window.
> >  
> > --
> > R. Mark Volkmann
> > Object Computing, Inc.
> > --
> > Cuis-dev mailing list
> > Cuis-dev at lists.cuis.st mailto:Cuis-dev at lists.cuis.st
> > https://lists.cuis.st/mailman/listinfo/cuis-dev
> > 
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