Russian Qt Forum

C++ (Qt)
    QGraphicsScene scene = new QGraphicsScene(this);
    scene.setSceneRect(-300, -300, 300, 300);
    scene.setItemIndexMethod(QGraphicsScene::NoIndex);

C++ (Qt)
    for (int i = 0; i < 3; ++i) {
        Target *target= new Target;
        scene.addItem(target);
    }

C++ (Qt)
    ui->grvMain->setScene(&scene);
 

C++ (Qt)
   painter->setBrush(color);
    painter->drawEllipse(-20, -20, 20, 20);

C++ (Qt)
QRectF Target::boundingRect() const
{
    qreal adjust = 0.5;
    return QRectF(-18 - adjust, -22 - adjust,
                  36 + adjust, 60 + adjust);
}

C++ (Qt)
    ui->grvMain->setBackgroundBrush(QPixmap(":/img/map.jpg"));
 

 QGraphicsScene scene = new QGraphicsScene(this);

 QGraphicsScene *scene = new QGraphicsScene(this);

C++ (Qt)
    QGraphicsEllipseItem *pkrug = new QGraphicsEllipseItem(0, scene);
 
    pkrug->setPen(QPen(Qt::black));
    pkrug->setBrush(QBrush(Qt::yellow));
    pkrug->setRect(QRectF(-30,-30,120,80));
    pkrug->setFlags(QGraphicsItem::ItemIsMovable|QGraphicsItem::ItemIsSelectable);

C++ (Qt)
#include <QApplication>
#include <QGraphicsScene>
#include <QGraphicsView>
#include <QGraphicsItem>
 
class CircleItem : public QGraphicsItem
{
public:
	CircleItem( qreal radius, QGraphicsItem* parent = 0 )
	: QGraphicsItem( parent )
	, radius_( radius ) {}
	virtual ~CircleItem() {}
	void paint( QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = 0 )
	{
		painter->drawEllipse( QRectF( -radius_ / 2, -radius_ / 2, radius_, radius_ ) );
	}
	QRectF boundingRect() const
	{
		return QRectF( -radius_ / 2, -radius_ / 2, radius_, radius_ );
	}
public:
	qreal	radius_;
};
 
int main( int argc, char** argv )
{
	QApplication app( argc, argv );
	QGraphicsView	gv;
	QGraphicsScene	scene( -150, -150, 300, 300 );
 
	gv.setScene( &scene );
	gv.setRenderHint( QPainter::Antialiasing );
 
	for( qreal r = 20; r < 300; r += 10 )
		scene.addItem( new CircleItem( r ) );
 
	gv.show();
	return app.exec();
}
 

C++ (Qt)
scene.setSceneRect( -300, -300, 300, 300 );

C++ (Qt)
     QPixmap pixmap(":/img/res__su30.png");
     painter->drawPixmap(0,0, pixmap);

C++ (Qt)
void TargetsView::drawBackground(QPainter *painter, const QRectF &rect)
{
    QPointF center(sceneRect().width() / 2, sceneRect().height() / 2);
    painter->drawEllipse(center, 90, 90);
}

C++ (Qt)
void TargetsView::drawBackground(QPainter *painter, const QRectF &rect)
{
    painter->drawEllipse(QPointF( 0, 0 ), -45, -45);
}

C++ (Qt)
void TargetsView::drawBackground(QPainter *painter, const QRectF &rect)
{
    painter->drawEllipse(QPointF( 0, 0 ), -45, -45);
}