I think you left out a super drawOn: aCanvas in your method.
Interesting to hear if this works:
drawOn: aCanvas
aCanvas borderWidth:10; borderColor: Color green.
*super**drawOn: aCanvas.*
The rest should work AFAICS, but it could be simplified.
(I haven't Pharo available so that I can test it)
--Trygve
On 04.02.2015 19:00, nacho wrote:
Hi,
I have the following question:
I want to draw a bouncing ball.
First thing I do is create a class:
EllipseMorph subclass: #Ball
instanceVariableNames: 'position'
classVariableNames: ''
category: 'PBE-BouncingBall'
Then an initialization method that mostly do a super initialize.
Then the drawOn:
drawOn: aCanvas
aCanvas borderWidth:10; borderColor: Color green.
And finally a position method:
position: aPoint
super position: aPoint.
position
^ position.
Finally in a Playground I do:
| aBall |
aBall := Ball new.
aBall position: ( 10@10 ).
aBall openInWorld.
But I get a red box with two crossing yellow lines.
What I'm missing?
Thanks in advance.
Nacho
-----
Nacho
Smalltalker apprentice.
Buenos Aires, Argentina.
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---
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