how can i enhance the speed of drawing massive data graph by QGraphicsViewFrame

[christina123y]

What is not compatible with your graph?

I mean the way you adviced(which draw every point as an item ) may not available to my need.
now i have tried to draw points on an image,then put the image on the QGraphicsPixmapItem.
And, how can i resolve the other problem as i put forward ? thank you very much

[wysota]

I mean the way you adviced(which draw every point as an item ) may not available to my need.

Why not?

And, how can i resolve the other problem as i put forward ? thank you very much

I'm not sure what you wanted there so it's hard to answer. My first guess would be that you need two scenes and two views.