QGraphicScene and different topmost QGraphicItem

[Xaar]

Hi,

I've a slot as follows:

qDeleteAll( scene.items() );
 
QGraphicsEllipseItem *el = new QGraphicsEllipseItem(-100,-300,200,200);
   el->setBrush( QBrush(Qt::green) );  
   scene.addItem( el );
   QGraphicsEllipseItem *el1 = new QGraphicsEllipseItem(-300,-100,200,200);
   el1->setBrush( QBrush(Qt::green) );  
   scene.addItem( el1 );
   QGraphicsEllipseItem *el2 = new QGraphicsEllipseItem(-100,100,200,200);
   el2->setBrush( QBrush(Qt::green) );  
   scene.addItem( el2 );
   QGraphicsEllipseItem *el3 = new QGraphicsEllipseItem(100,-100,200,200);
   el3->setBrush( QBrush(Qt::green) );  
   scene.addItem( el3 );
 
   scene.addLine( 0,-400, 0,  400 ); 
   scene.addLine( -400,0, 400,  0 );
 
   setScene(&scene);
 
   fitInView(scene.itemsBoundingRect());

qDeleteAll( scene.items() );

QGraphicsEllipseItem *el = new QGraphicsEllipseItem(-100,-300,200,200);
   el->setBrush( QBrush(Qt::green) );  
   scene.addItem( el );
   QGraphicsEllipseItem *el1 = new QGraphicsEllipseItem(-300,-100,200,200);
   el1->setBrush( QBrush(Qt::green) );  
   scene.addItem( el1 );
   QGraphicsEllipseItem *el2 = new QGraphicsEllipseItem(-100,100,200,200);
   el2->setBrush( QBrush(Qt::green) );  
   scene.addItem( el2 );
   QGraphicsEllipseItem *el3 = new QGraphicsEllipseItem(100,-100,200,200);
   el3->setBrush( QBrush(Qt::green) );  
   scene.addItem( el3 );
   
   scene.addLine( 0,-400, 0,  400 ); 
   scene.addLine( -400,0, 400,  0 );
   
   setScene(&scene);

   fitInView(scene.itemsBoundingRect());

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When I call this slot I have different QGraphicItem at top. Sometimes is a line and sometimes a ellipse ?(
What should I do to have always lines the topmost items?

I hope I clearly explain what is my problem. To be sure here is a PrintScreen, you can see that left ellipse is over the line, but others are below. This is a first call for this slot.



Does anybody know what I'm doing wrong?

[jpn]

You may use QGraphicsItem::setZValue() to adjust the stacking order of graphics items.

[Xaar]

You may use QGraphicsItem::setZValue() to adjust the stacking order of graphics items.

This is what I was looking for
Thaks a lot.

[wysota]

You might also want to turn on antialiasing for the view Those ellipses don't look very good.