Hi Mathieu,
To profile, which kind of visualization are you using? A
ROMondrianViewBuilder or a ROView? I'm saying this because a
ROView rendering a set of ROElements without any interaction will
maybe help you to isolate problems related with rendering and
problems related with events.
I believe that yes, first of all it would be useful to use a good
method to select which elements are visible and which of them are
not. However, refreshing only the reached elements might be a bit
complicated in the case you have other elements behind. Ie, when
having overlapping elements maybe you should first find them and
then refresh them too, which maybe can be expensive as you maybe
need to do run through the view's elements. Because of this, I
liked the idea of a tile system in which you refreshed a tile with
a set of elements inside. But I understand the reasons of not
liking it because it will add more complexity to Roassal :)
I also like the idea of using an image to render instead of
drawing all the shape.
Cheers,
Vanessa.
On 06/26/2013 08:50 AM,
mathieubmddehouck@mailoo.org wrote:
Hi
I just begin looking after point of optimisation into Roassal
and I there are different points :
- firstly, it is not easy to profile
- it seems that when we move the mouse on the visualisation
then it draws everything each time we move the mouse.
And of course the biggest the visualisation is, the hottest the
computer is to be.
So maybe we should either, only draw the visible things (we
must know what is visible easily),
or we should draw the whole visualisation as a picture
(bitmap or svg ) in a buffer and then just navigate in it, and
keeping a list of visible things (not to be drawn but to be
checked for interactions).
I think the picture is a good solution (maybe not a perfect
one) since refreshing a picture is fine easier than redrawing
the whole visualisation.
And we should only draw changing elements with another color
when dragging them.
What do you think about that ??
Regards
Mathieu
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