Unable to get QList of custom QGraphicsItems (newbie) from scene

[@vijay@]

Hi,
I have created a subclass from QGraphicsItem

class Node : public QGraphicsItem{
};

class Node : public QGraphicsItem{
};

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and added few nodes using following code to a QGraphicsscene

for(int j=0;j<no_of_nodes;j++){
    Node *node = new Node();
    node->apply_color(QColor(Qt::green));
    node->setPos(0,0);
    node->apply_text(node_name[j]);
    scene->addItem(node);
}

for(int j=0;j<no_of_nodes;j++){
    Node *node = new Node();
    node->apply_color(QColor(Qt::green));
    node->setPos(0,0);
    node->apply_text(node_name[j]);
    scene->addItem(node);
}

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Now i want to access these nodes later for changing color (apply_color() function defined in Node). I looked at a function called

QList<QGraphicsItem *> scene->items();

QList<QGraphicsItem *> scene->items();

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so i tried to get the list of graphicalitems using

QList<Node *> listofitems = scene->items();

QList<Node *> listofitems = scene->items();

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but im getting the following error

conversion from ‘QList<QGraphicsItem*>’ to non-scalar type ‘QList<Node*>’ requested

And how does the QList<QGraphicsItem *> scene->items(); return items ??? in the same order as they are added???
I have also uploaded the code

Thanx

[jpn]

You cannot directly convert between two template containers which contain different types.

QList<QGraphicsItem *> items = scene->items();
foreach (QGraphicsItem* item, items)
{
    Node* node = dynamic_cast<QGraphicsItem*>(item);
    if (node)
    {
        ...
    }
}

QList<QGraphicsItem *> items = scene->items();
foreach (QGraphicsItem* item, items)
{
    Node* node = dynamic_cast<QGraphicsItem*>(item);
    if (node)
    {
        ...
    }
}

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See also qgraphicsitem_cast for more efficient casting. It just requires support from Node class.