What is the best way to visualize large data sets in QT

Question

Hey!

I am working on a Qt project, which require visualization of very large data sets (time + value measurements). By very large I mean millions of values.

I need to support scrolling across these values and zoom-in/out operations in the time axis. The ultimate zoom-out should show all the data set sub-sampled to match the window width.

Here are the Qt toolkits I know for drawing the functions:

1. QWT
2. HippoDraw
3. KD Chart

I've actually two questions:

1. Do you know any other toolkit for drawing function using Qt?
2. What of the above tools will fit for my purposes better?

If you have any other relative comment / idea regarding my problem, feel free to share.

Thanks :)

Answer 1

Hi Lev!

Well, I'm working in a QT Project too, and I'm using Qwt. I can say that Qwt is a good solution because is:

• Easy to use.
• Easy to learn.
• A complete source of good looking charts.

This is a starter tutorial about Qwt, I hope it helps: Tutorial

About the other options I cannot say anything because I don't know them.

See you!

Answer 2

though Qwt is good; you might also want to give a try to the chart component from the AnalogWidgets set