[Newbies] Sending messages

James O'Brien obrienjs at comcast.net
Fri Jun 15 17:59:42 UTC 2012


I think I figured out the problem. I named the box SecondBox instead of secondBox. Using secondBox works.

On Jun 15, 2012, at 10:43 AM, James O'Brien wrote:

> I had moved the first box out of the way. I should have mentioned that when I try to change the second box's color I get an error message: MessageNotUnderstood: SecondBox class >> #color:
> 
> On Jun 15, 2012, at 9:20 AM, Chris Cunnington wrote:
> 
>> Your boxes are piling up. Drag one off the other and you'll see that you did. 
>> 
>> Chris 
>> 
>> On 2012-06-15, at 11:12 AM, James O'Brien wrote:
>> 
>>> I typed the following in a workspace and created a rectangle:
>>> FirstBox := RectangleMorph new openInWorld.
>>> 
>>> I then changed its color:
>>> FirstBox color: Color green.
>>> 
>>> I next created a system category with a RectangleMorph subclass:
>>> RectangleMorph subclass: #TestBox
>>> 	instanceVariableNames: ''
>>> 	classVariableNames: ''
>>> 	poolDictionaries: ''
>>> 	category: 'SqueakExperiment'
>>> 
>>> I then used a workspace to create a new rectangle:
>>> SecondBox := TestBox new openInWorld.
>>> 
>>> But I could not change its color like I could with the first rectangle: 
>>> SecondBox color: Color green.
>>> 
>>> How can I change the second rectangle’s color by sending it a message from a workspace?
>>> 
>>> _______________________________________________
>>> Beginners mailing list
>>> Beginners at lists.squeakfoundation.org
>>> http://lists.squeakfoundation.org/mailman/listinfo/beginners
>> 
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> 
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