[Gambas-user] gb.web.gui and Canvas
benoit.minisini at gambas-basic.org
Mon Aug 1 01:05:29 CEST 2022
Le 31/07/2022 à 22:22, Bruce Steers a écrit :
> On Sun, 31 Jul 2022 at 20:59, Benoit Minisini
> <benoit.minisini at gambas-basic.org
> <mailto:benoit.minisini at gambas-basic.org>> wrote:
> Le 31/07/2022 à 21:44, Bruce Steers a écrit :
> > Anything been considered with html Canvas?
> > https://www.w3schools.com/tags/ref_canvas.asp
> > <https://www.w3schools.com/tags/ref_canvas.asp
> > Looks like some kind of WebPaint.class could be added to gb.web.gui.
> > Respects
> > BruceS
> Yep. The difficulty is keeping the state of the canvas on the server.
> Dang, i was thinking of a brand new era of hand draw controls.. :)
> I guess small image data could work using gb.image serverside and just
> keep painting it onto canvas. (i guess image data can be sent somehow
> from server and not just loaded from a file refresh)
> An initial Image maker i guess is easy enough to use gb.image to save a
> on-the-fly made image to server for page to read.
> gonna look into canvas though and see what i can accomplish :)
> (fancy sharing any test sources ?)
To keep the canvas state, you have to store on the server all the
canvas can be redrawn at any time.
Or better, you have an intermediate representation of the drawing
store the intermediate representation, that should be concise.
You can imagine then a method to upload the canvas contents to the
server, but that needs support from 'gb.web.gui' 'lib.js' library.
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