[squeakland] Playfield Questions

Steve Thomas sthomas1 at gosargon.com
Mon Dec 7 21:00:13 EST 2009


In the Playfield's Viewer -> Category: playfield

mouse's X  and mouse's Y
*QUESTION*: Is this the mouses position in relation to the "Playfields"
origin?

Please help me distinguish

   - *Playfield:Viewier->Category:collections->graphic at cursor*
   - *Playfield:Viewier->Category:playfiled->graphic*

It seems the "*Playfield:Viewier->Category:playfiled->graphic *which can be
set via Halo:Paint Background and via assignment in a script is meant to be
a "*Background*"

   - That makes sense to me but here is my concern/lack of understanding . .
   .
   *Why is it when I add a Background Image*, the
   Playfield:Viewier->Category:collections->graphic:*count* Increases?
   - IE, If I try and iterate through the items in the Playfield with the
   cursor and there is a background, I will get the background sketch as the
   first item in the list.
   - I would think the "Background Sketch/Graphic would not be part of the
   "Collection".

I created a Etoys project to test this go to page 2 of Fun With
Playfields<http://www.squeakland.org/launcher/?http://www.mrstevescience.com/Etoys/Fun%20With%20Playfields.010.pr%20>(its
a work in progress, suggestions welcome).
Stephen
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