>
> Ok I have 2 partial answers to myself:
>
>
> I need to draw triangles (and circles) on the screen (any drawable)
> and have active events on each object I draw: namely mouse_over,
> click.. etc..
> [they can overlap]
>
> Is there any alternative to gnome-canvas?
> In particular gnome-canvas was working nicely up to 20000 objects
> but a bit heavy with 40000. (I would guess that an equivalent
> canvas solution will suffer the same problem..)
>
> Is there a simple way to "recode" a simple z-buffer using
> existing tools?
> With simple I mean that I do not have to recalculate exposed pixels.
>
>
> 1) There is no simple coding or otherwise I would be doing a canvas!
>
> 2) for my little application I have a possible solution:
> I set up a z-buffer as simple integers vector. I store 2 doubles
> at least for each figure so an integer shouldn't harm the memory.
> Due to the type of application, on an click at x,y, I can guess
> a limited number of triangles which might be present in the area.
> I can redraw the area in the style of a canvas and propagate
> the event. Grab it. destroy the canvas-like object. and redraw
> in normal style.
> I am not sure if I can actually do it... more over I'll still need
> the canvas part.
> The advantage is that (of course I do not have to code again
> the pixel stuff) I can change shape of my
> objects at will (ok twice) and moreover I can simply use the event
> stuff which exists already.
> The overload on the users side shouldn't e that big They will stare
> at the screen anyway.. ;).
> On which widget can I draw a canvas at arbitrary coordinates?
> I'll find it out ;)
> [
> I got the idea from an old post...
>
http://mail.gnome.org/archives/gtk-list/2006-September/msg00275.html
> Where I discussed the problem in different terms.
> I didn't actually try it. The first reason was that on win
> machines it would
> have made no difference.
> ]
>
> A note: would it be a possibility to have a gdk widget named
> shape(for example)
> which simply draw itself and gets events?
> It is just the same problem of shaped windows and the like.
>
> sorry again for the long post..
> Faio
>
>
> _______________________________________________
> gtk-list mailing list
