Smalltalk - Re: Question on Morphic drawOn: method.

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Re: Question on Morphic drawOn: method.

Posted by nacho on Feb 04, 2015; 8:46pm
URL: https://forum.world.st/Question-on-Morphic-drawOn-method-tp4803695p4803749.html

Great! Thanks.

It works perfectly in Pharo 3 but not in Pharo 4.

I thought that the drawOn: aCanvas was mandatory.

I'm so lost in morphic.

Trying to understand the logic of it slowly.

Unfortunately there seems to be little documentation and a lot of what is there does not work in Pharo 3 or 4.

Thanks again for taking the time!

Best

Nacho

Lic. Ignacio Sniechowski, MBA

Prosavic SRL

Tel: (011) 4542-6714

On Wed, Feb 4, 2015 at 5:30 PM, Sean P. DeNigris [via Smalltalk] <[hidden email]> wrote:

HilaireFernandes wrote

First you don't need to subclass EllipseMorph...
100 to: 50 by: -1 do: [ :x |
aBall
height: x;
bottom: 200 - x.
World doOneCycle]

Of course you can have the best of both worlds by using Morphic stepping in your subclass, like:

EllipseMorph subclass: #Ball
...
Ball>>#step
self
bottom: 200 - self nextHeight;
height: self nextHeight.

self bottom = 100 ifTrue: [ increment := -1 ].
self bottom = 150 ifTrue: [ increment := 1 ].

For full code:
Gofer it
smalltalkhubUser: 'SeanDeNigris' project: 'SeansPlayground';
package: 'Ball';
load.
Cheers,
Sean

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Nacho Smalltalker apprentice. Buenos Aires, Argentina.