I'm trying to draw a line, I managed to do it before but the first point somehow was always 0, 0. Now my logic is, there are two Vectors, one to store each point that is clicked, and another to store the Line, which is made by two points clicked by the user. I do the verifications to see if the Vector is not empty and only then I draw the line. I don't really know what's going on, I've tried everything, hope some of you can help, I'm in real need. Thank you.