[Cuis-dev] VectorGraphics and Morph

[Hilaire Fernandes]

In DrGeo canvas (with Pharo's cairo canvas), I don't use cached forms, 
the whole canvas is top down re-draw when marked dirty. Brutal but a 
long time ago I discovered that in this specific situation it was much 
faster rather than Morph update mechanism based on dependencies.

In some DrGeo canvas you can have a lot math items (models).  Each model 
is rendered as a morph in the canvas, it eases the debugging as you can 
inspect a faulty item with the help of the halo.

Not sure it is the right way to go for a more general approach, but a 
dedicated PasteupMorph will clarify how ones can write a small 
interactive application.

Not sure I was clear.

Le 19/06/2020 à 16:42, Juan Vuletich a écrit :
>
> You mean making your caching strategy part of the framework? Sounds 
> like a good idea, and not too hard to do (you already did the work). 
> Still, Morphs would need a message to invalidate the cached Form and 
> redraw it again with VectorCanvas, right? Right now, you are caching 2 
> Forms, but a genera framework solution should allow easily 
> invalidating the cached form without needing to know how many variants 
> could exist, and what triggers the change.
>
> This is getting really interesting. Let's move it forward!

-- 
GNU Dr. Geo
http://drgeo.eu
https://pouet.chapril.org/@hilaire

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