Problem with QGraphicsProxyWidget implementation

[papillon]

Hi, I subclassed a QGraphicsProxyWidget and I can successfully add it to the scene. However, I cannot move it around, and it seems that no mouse events are triggered.

Here is my implementation:

proxy.h

class GENProxy : public QGraphicsProxyWidget
{
public:
GraphicsItem *parent = 0, QGraphicsScene *scene = 0);
protected:
	QVariant itemChange(GraphicsItemChange change, const QVariant &value);
        void mousePressEvent(QGraphicsSceneMouseEvent * event);
.....
}

class GENProxy : public QGraphicsProxyWidget
{
public:
GraphicsItem *parent = 0, QGraphicsScene *scene = 0);
protected:
	QVariant itemChange(GraphicsItemChange change, const QVariant &value);
        void mousePressEvent(QGraphicsSceneMouseEvent * event);
.....
}

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proxy.cpp

#include "proxy.h"
.....
GENProxy::GENProxy(QGraphicsItem *parent, QGraphicsScene *scene) : QGraphicsProxyWidget(parent)
{
    QGroupBox *groupBox = new QGroupBox("Contact Details");
    QLabel *numberLabel = new QLabel("Telephone number");
    QLineEdit *numberEdit = new QLineEdit;  
    QFormLayout *layout = new QFormLayout;
    layout->addRow(numberLabel, numberEdit);
    groupBox->setLayout(layout);
    QGraphicsProxyWidget *w = scene->addWidget(groupBox);
    w->setFlag(QGraphicsItem::ItemIsMovable,true);
    w->setFlag(QGraphicsItem::ItemIsSelectable,true);
    w->setFlag(QGraphicsItem::ItemIsFocusable,true);
    w->setFocus();
}

#include "proxy.h"
.....
GENProxy::GENProxy(QGraphicsItem *parent, QGraphicsScene *scene) : QGraphicsProxyWidget(parent)
{
    QGroupBox *groupBox = new QGroupBox("Contact Details");
    QLabel *numberLabel = new QLabel("Telephone number");
    QLineEdit *numberEdit = new QLineEdit;  
    QFormLayout *layout = new QFormLayout;
    layout->addRow(numberLabel, numberEdit);
    groupBox->setLayout(layout);
    QGraphicsProxyWidget *w = scene->addWidget(groupBox);
    w->setFlag(QGraphicsItem::ItemIsMovable,true);
    w->setFlag(QGraphicsItem::ItemIsSelectable,true);
    w->setFlag(QGraphicsItem::ItemIsFocusable,true);
    w->setFocus();
}

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main.cpp

QGraphicsScene *myScene=new QGraphicsScene;
    QGraphicsView *myView = new QGraphicsView(myScene);
    myView->setRenderHint(QPainter::Antialiasing);
    myView->setSceneRect(0, 0, 800, 800);
    myView->setBackgroundBrush(Qt::gray);
    QVBoxLayout* vlayout = new QVBoxLayout(mainClass.Interface.terraformTab);
    vlayout->addWidget(myView);
    GENProxy *a = new GENProxy(0, myScene);

QGraphicsScene *myScene=new QGraphicsScene;
    QGraphicsView *myView = new QGraphicsView(myScene);
    myView->setRenderHint(QPainter::Antialiasing);
    myView->setSceneRect(0, 0, 800, 800);
    myView->setBackgroundBrush(Qt::gray);
    QVBoxLayout* vlayout = new QVBoxLayout(mainClass.Interface.terraformTab);
    vlayout->addWidget(myView);
    GENProxy *a = new GENProxy(0, myScene);

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As a matter of fact, the only signal showing activity is itemChange, but I can't set the focus or move the proxy around, and signals attached to the proxy embedded widgets aren't firing either (avoided to put those in the above code).
I followed also another thread here (http://www.qtcentre.org/threads/3191...g-widget-focus) but couldn't come up with a solution.
Thanks for any help.