Re: Continuation of "Drawing issues when updating in real-time"

[Micha B. <kri...@us...>]

@Vicente

I cannot reproduce the behavior here. I have the very same system, 
except ATI replacing the NVIDIA card. But this shouldn't cause the 
problem, I think.

What kind of threading model is it, that is used in your code? Qt 
threads? I haven't to much experience with them, but could it be, that 
your slot misses some kind of Mutex, preventing paint events between 
updated scaling values but before new data are completely read. Or some 
similar inconsistency.

The things I mean, are mentioned here:

http://doc.trolltech.com/4.6/threads-qobject.html#accessing-qobject-subclasses-from-other-threads 
  etc.

How about serializing the code, what happens then?


A small issue:

Could it be, you mix X and Y in the following code sequence:

>     coords->axes[X1].setTicLength(3*yScale, yScale);
>     coords->axes[X2].setTicLength(3*yScale, yScale);
>     coords->axes[X3].setTicLength(3*yScale, yScale);
>     coords->axes[X4].setTicLength(3*yScale, yScale);
>
>     coords->axes[Y1].setTicLength(3*xScale, xScale);
>     coords->axes[Y2].setTicLength(3*xScale, xScale);
>     coords->axes[Y3].setTicLength(3*xScale, xScale);
>     coords->axes[Y4].setTicLength(3*xScale, xScale);

Micha