why setPen didn't work?

stackprogramer

hi, here is a part of my source,
why despite changing color pen,my shape is created in only one color blue??
i want to some line is blue,some line is black...


        myPolygon << QPointF(-100, -100) << QPointF(100, -100)
                  << QPointF(100, 100) ;

         setPen(QPen(Qt::black, 2, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));

              path.addRect(0,0,200, 200);
              myPolygon = path.toFillPolygon();

             setPen(QPen(Qt::blue, 2, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));

               path.setFillRule(Qt::OddEvenFill);
              path.addRect(90,0,20,20);
              path.addRect(0,90,20,20);
              path.addRect(180,90,20,20);
              myPolygon << QPointF(0, 0) << QPointF(40,0)
                        << QPointF(0, 40) ;
              path.addPolygon( myPolygon);

this is link image shape:
http://www.mediafire.com/view/em34sbr026b555m/Qpenproblem.png#
thanks for reply

mrjj

Hi
What are u calling setPen on?

Paths do not store color and such information
so Im not sure its possible to do with only 1 polygon.

Maybe create a subclass of QGraphicsItem and paint it directly with
qpainter::drawLine which supports colors very easy.

http://www.bogotobogo.com/Qt/Qt5_QGraphicsView_QGraphicsScene_QGraphicsItems.php