[Qt-interest] Qt Charting Component - Feedback Request

[Syam Krishnan]

On 03/04/2011 09:19 PM, Sean Harmer wrote:
> Hi All,
>
> I've started work on a charting component for Qt. I have posted some details
> of it along with code snippets on the Qt DevNet:
Wow.. The screenshots do look great.
>
>
> I would like to ask those of you on this list if there is interest in such a
> charting component and to ask you for feedback on the API and features that I
> have in place so far. I am also open to feature requests - although no
> promises of an implementation at this stage.
I'm very much interested in a good charting component. We've been trying 
out Qwt, but it seems to have some performance problems when used with 
larger changing datasets.
Our requirement often is plotting of continuous data. i.e. a new data 
point is available every 100 or 200 ms. Adding these points to the plot 
should be as light-weight an operation as possible. As far as I can see, 
the current Qwt implementation requires copying the entire point list 
again and re-plotting from the beginning. This consumes a lot of CPU. 
I'd love to see an implementation where incremental plotting is super-fast.

Thanks again.


Syam