keep QGraphicsItem away from other QGraphicitems

[hayzel]

I solved the problem finally with the code:

QVariant saItemSteelNode::itemChange(GraphicsItemChange change, const QVariant &value)
{
  double s;   
  if (change == QGraphicsItem::ItemPositionChange) {
    QPointF newPos = value.toPointF();  
    if(Settings::snapOn()==1)
    {
      s=Settings::snapSize();
      newPos.setX(floor(newPos.x()/s)*s);
      newPos.setY(floor(newPos.y()/s)*s);
    };
    //check collision with other nodes
    QPainterPath p;
    p.addEllipse(newPos,diameter/2.0+1,diameter/2.0+1);
    QList<QGraphicsItem*> sl=scene()->items(p);
    sl=saScene::refineItems(sl,saItemSteelNode::TypeSteelNode);
    sl.removeAll(this);
    if(sl.count()>0)//collision
    {
      newPos=pos();
    };
    emit itemPositionChanged();
    return newPos;
  };
  return QGraphicsItem::itemChange(change,value);
  return value;
}

QVariant saItemSteelNode::itemChange(GraphicsItemChange change, const QVariant &value)
{
  double s;   
  if (change == QGraphicsItem::ItemPositionChange) {
    QPointF newPos = value.toPointF();  
    if(Settings::snapOn()==1)
    {
      s=Settings::snapSize();
      newPos.setX(floor(newPos.x()/s)*s);
      newPos.setY(floor(newPos.y()/s)*s);
    };
    //check collision with other nodes
    QPainterPath p;
    p.addEllipse(newPos,diameter/2.0+1,diameter/2.0+1);
    QList<QGraphicsItem*> sl=scene()->items(p);
    sl=saScene::refineItems(sl,saItemSteelNode::TypeSteelNode);
    sl.removeAll(this);
    if(sl.count()>0)//collision
    {
      newPos=pos();
    };
    emit itemPositionChanged();
    return newPos;
  };
  return QGraphicsItem::itemChange(change,value);
  return value;
}

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