[squeakland] loading and image file and making vanish after a while

Ricardo Moran richi.moran at gmail.com
Tue Apr 26 11:37:00 EDT 2011

Hi Offray,

Regarding fading images I think you'll find this useful:

The example there works fine in Squeak but I couldn't make it work in Etoys
yet. It's possibly a BitBlt bug but I haven't checked further.


On Sat, Apr 23, 2011 at 1:37 AM, Offray Vladimir Luna Cárdenas <
offray.luna at javeriana.edu.co> wrote:

> Hi all,
> I would like to create some kind of artistic project on Pharo/Squeak.
> The idea is to make some images appear and vanish slowly after a while.
> Browsing the net I have found this code on pharo to change the background:
> |form|
> form := (Form fromBinaryStream: (HTTPSocket httpGet:
>     'http://ubuntu.ecchi.ca/wallpapers/10.04/' ,
> 'Maraetaibeforesunrise.jpg')).
> World backgroundImage: form layout: #scaled
> and I imagine that something similar is needed to load any image from
> Internet or hard disk changing the path and making it appear on the
> screen. I have tried this:
> x := ImageMorph new.
> x image: (Form fromFileNamed: '/home/offray/Temp/myFile.png').
> x openInWorld.
> and is working, but I can get the halos on this image on pharo using
> Ctrl + Shif + Click on Pharo, but is not working. So I have 3 questions:
> 1. There is any way to get halos on the image by coding instead of
> clicking on it?
> 2. Can I use alpha channels to make the loaded image fade after a while
> once it appeared?
> 3. I'm using Pharo one click image. There is any way to use the local
> paths of the image to load some images and load some others from the
> Internet? The idea is to distribute the small artistic project in this way.
> This is trying to be a weekend newbie project, to show to my interactive
> art teacher, so any quick help would be really appreciated (first I was
> trying to get the idea, and the using Etoys, so now I'm on pharo, hoping
> to make this work easily).
> Thanks,
> Offray
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> squeakland at squeakland.org
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