Print lines

[AlvaroS]

Hi everyone:

First of all thans for helping me.

I have an structure where it includes the points (x_start,y_start,x_end,y_end) of a line.
I would like to paint the line and to be able to visualize in the mainwindow.

Which class or/and widget have I to use?

Thanks a lot!

[jsulm]

QPainter: http://doc.qt.io/qt-5/qpainter.html