QGraphicsView Problem !!

[Gamalof]

Actually i used update function, but nothing happened !!

here is the Slot with updated function.

GVar= (int)(ui.horizontalSlider->value());
 
	        MySlot::scene.addEllipse (10, 10, GVar, GVar,
			 QPen(Qt::black, 15, Qt::SolidLine, Qt::RoundCap,
					Qt::MiterJoin),
			 QBrush(Qt::blue, Qt::DiagCrossPattern)); 
 
             MySlot::scene.setBackgroundBrush(Qt::red);
 
	     MySlot::view->update();
 
	     MySlot::view->setAttribute(Qt::WA_DeleteOnClose);
             MySlot::view ->show();	
}

GVar= (int)(ui.horizontalSlider->value());

	        MySlot::scene.addEllipse (10, 10, GVar, GVar,
			 QPen(Qt::black, 15, Qt::SolidLine, Qt::RoundCap,
					Qt::MiterJoin),
			 QBrush(Qt::blue, Qt::DiagCrossPattern)); 

             MySlot::scene.setBackgroundBrush(Qt::red);

	     MySlot::view->update();

	     MySlot::view->setAttribute(Qt::WA_DeleteOnClose);
             MySlot::view ->show();	
}

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