[Newbies] Sending messages
smalltalktelevision at gmail.com
Fri Jun 15 16:20:34 UTC 2012
Your boxes are piling up. Drag one off the other and you'll see that you did.
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?
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