add points/path to QGraphicsView

[szisziszilvi]

all right, thank you a lot, I'll come back soon with the errors...
but honestly thanks, I think now I get it. off to try.

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Added after 6 minutes:

Bearhug for JohannesMunk!

For some similarly beginner's interest the whole code together:
the derived class declaration:

class myQGraphichsItem : public QGraphicsItem
{
private:
    QRect bRect;
public:
    myQGraphichsItem();
    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
    QRectF boundingRect() const{ return bRect; }
    void setBoundingRect(int x1,int y1,int x2,int y2){bRect = QRect(x1,y1,x2,y2);}
};

class myQGraphichsItem : public QGraphicsItem
{
private:
    QRect bRect;
public:
    myQGraphichsItem();
    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
    QRectF boundingRect() const{ return bRect; }
    void setBoundingRect(int x1,int y1,int x2,int y2){bRect = QRect(x1,y1,x2,y2);}
};

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the paint method reimplemented:

void myQGraphichsItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
    painter->drawRect(boundingRect());
}

void myQGraphichsItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
    painter->drawRect(boundingRect());
}

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in useage:

QGraphicsScene *scene =  new QGraphicsScene;
myQGraphichsItem *mgi = new myQGraphichsItem;
mgi->setBoundingRect(30,60,90,100);
scene->addItem(mgi);
ui->graphicsView->setScene(scene);

QGraphicsScene *scene =  new QGraphicsScene;
myQGraphichsItem *mgi = new myQGraphichsItem;
mgi->setBoundingRect(30,60,90,100);
scene->addItem(mgi);
ui->graphicsView->setScene(scene);

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