prepareGeometryChange problem

[Benne Gesserit]

Do you realy need to call prepareGeometryChange()? Why? If I am not wrong ,you only need to call that when the boundingRect changes ,does the boundingRect of a line change when you move a node?
Anyway,if you need to call that ,declare itdNode as a friend in line class ( friend class Line ; or whatever the name of the class is) .

[stefan]

LinkedItems is vector of pointers to QGraphicsItem, so i should in QGraphicsItem class declare friend node class. The best way is to create myItem class which inhertis QGraphicsItem, and has friends (Node, Line, etc.). Then node and line classes inherits myItem. I think that that would do the trick.

class itdItem : public QGraphicsItem
{
    friend class itdLine;
    friend class itdNode;
}
class itdLine : public itdItem 
class itdNode: public itdItem

class itdItem : public QGraphicsItem
{
    friend class itdLine;
    friend class itdNode;
}
class itdLine : public itdItem 
class itdNode: public itdItem

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now i can create in each (new or existing) object a list of pointers to linked items. cool

thank you for your friendly friend suggestion