[Qt-interest] Using Qpainter/Qgraphics for a gps car-like

[Gustavo B. Schenkel]

Hi folks,

i am developing a little application to work like a gps car, but to other 
ends.

I am a little confuse how i can create the area and assign the gps point.
I don't know yet if i need use QPainterPath or QGraphicScene/QGraphicItem or 
both.
 
Above are the description what i need do:

I need insert 4 or more gps points in the screen, then i need paint a line 
between points to see the area. After i got the area i need be able get my 
actual gps position and move around the painted area, like a gps car, changing 
the view
 
For now i only wanna put the points in the screen.

e.g. point1(-29.683436 | -53.800570)
       point2(-29.683795 | -53.799620)
       point3(-29.684242 | -53.800749)
       point4(-29.684478 | -53.799623)
 
this points exist, and form a rectangle. If i use the QpainterPath how i can 
insert this points? Since the start position in qpainterpath is 0,0 and this 
points are -29,-53? 

I don't have a clue to start this. Can anyone give me a help/trick?

PS: sorry if my english not is soo good and if this post are duplicated, i 
dont know if i need put the [Qt-interest] tag in the subject.
-- 

Schenkel, Gustavo B.
Novice Qt/C++ Developer
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