Sending messages

> 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
> [hidden email]
> http://lists.squeakfoundation.org/mailman/listinfo/beginners

> 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
>> [hidden email]
>> http://lists.squeakfoundation.org/mailman/listinfo/beginners
>
> _______________________________________________
> Beginners mailing list
> [hidden email]
> http://lists.squeakfoundation.org/mailman/listinfo/beginners

> 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
>>> [hidden email]
>>> http://lists.squeakfoundation.org/mailman/listinfo/beginners
>>
>> _______________________________________________
>> Beginners mailing list
>> [hidden email]
>> http://lists.squeakfoundation.org/mailman/listinfo/beginners
>
> _______________________________________________
> Beginners mailing list
> [hidden email]
> http://lists.squeakfoundation.org/mailman/listinfo/beginners