[Ktechlab-devel] using SVGs

[Julian Bäume]

On Tuesday 17 November 2009 13:57:17 Zoltan Padrah wrote:
> Sounds good.
> 
> Just a note about the voltage/current visualization: considering the fact
> that the rectangles displaying the voltages will be redrawn many times per
> second, we should consider there the drawing performance. Maybe a simple
> class showing only that rectangle could be useful.
Good point. A QGraphicsScene is composed of many QGraphicsItems. The scene 
keeps track of visible items and if an item notifies the scene, that it's been 
updated, the region around the item will be repainted. This is done in an 
efficient way, so I don't see any problems here. The framework is specially 
designed with this use-case in mind.

bye then
julian
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 490 bytes
Desc: This is a digitally signed message part.
URL: <http://mail.kde.org/pipermail/ktechlab-devel/attachments/20091118/4ef2c357/attachment.sig>