[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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