Transform(move) Circle starting point - it needs to rotate and stay fixed

[petar]

Yes thanks guys - it works wonderfull

Code.

void RuletV1::on_pushButton_clicked()
{
	QTransform tra;
	qreal dx = 50; 
	qreal dy = 50;
	tra.translate(dx,dy);
	tra.rotate(Sumarum(30)); //every time add 30 and return
	tra.translate(-dx,-dy);
	dynamic_cast<CircleItem*>(m_elipsa)->setTransform(tra);
}

void RuletV1::on_pushButton_clicked()
{
	QTransform tra;
	qreal dx = 50; 
	qreal dy = 50;
	tra.translate(dx,dy);
	tra.rotate(Sumarum(30)); //every time add 30 and return
	tra.translate(-dx,-dy);
	dynamic_cast<CircleItem*>(m_elipsa)->setTransform(tra);
}

To copy to clipboard, switch view to plain text mode 

qreal RuletV1::Sumarum(qreal num) { return myangle+=num; }

qreal RuletV1::Sumarum(qreal num) { return myangle+=num; }

To copy to clipboard, switch view to plain text mode 

//public: qreal Sumarum(qreal Broj);
//private: qreal myangle;

................
Side questions -> just a little direction needed

1) If i recall CSS i would make elastic design web pages - i need to do the same in QT: Resizing the window (QMainWindow) needs to resize all elements on the view (QGraphicsView)

2) If i want to rotate my circle for a few seconds, what are my possibilites? Is there a built-in mechanism? wich class if apropriate
.........................

THX