I'm a beginner of QT4.

Now I have a big problem.

Now I can draw line in my defined widget

And I want to let this map turn into a serial displacement info.

If I have this displacement info. , I can use 8051 to control car to move.

so , Can anybody help me?

rainyboys1234@hotmail.com -- my e-mail .

I can send my .cpp file and .h file to U.

Thanks a lot.