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****************************************************************************/

#include <QtCore>

#include <QtGui>

class Pixmap : public QGraphicsWidget

{

    Q_OBJECT

public:

    Pixmap(const QPixmap &pix, QGraphicsItem *parent = 0)

        : QGraphicsWidget(parent), orig(pix), p(pix)

    {

    }

    void paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)

    {

        painter->drawPixmap(QPointF(), p);

    }

    virtual void mousePressEvent(QGraphicsSceneMouseEvent * )

    {

        emit clicked();

    }

    virtual void setGeometry(const QRectF &rect)

    {

        QGraphicsWidget::setGeometry(rect);

        if (rect.size().width() > orig.size().width())

            p = orig.scaled(rect.size().toSize());

        else

            p = orig;

    }

Q_SIGNALS:

    void clicked();

private:

    QPixmap orig;

    QPixmap p;

};

void createStates(const QObjectList &objects,

                  const QRect &selectedRect, QState *parent)

{

    for (int i = 0; i < objects.size(); ++i) {

        QState *state = new QState(parent);

        state->assignProperty(objects.at(i), "geometry", selectedRect);

        parent->addTransition(objects.at(i), SIGNAL(clicked()), state);

    }

}

void createAnimations(const QObjectList &objects, QStateMachine *machine)

{

    for (int i=0; i<objects.size(); ++i)

        machine->addDefaultAnimation(new QPropertyAnimation(objects.at(i), "geometry"));    

}

int main(int argc, char **argv)

{

    Q_INIT_RESOURCE(appchooser);

    QApplication app(argc, argv);

    Pixmap *p1 = new Pixmap(QPixmap(":/digikam.png"));

    Pixmap *p2 = new Pixmap(QPixmap(":/akregator.png"));

    Pixmap *p3 = new Pixmap(QPixmap(":/accessories-dictionary.png"));

    Pixmap *p4 = new Pixmap(QPixmap(":/k3b.png"));

    p1->setObjectName("p1");

    p2->setObjectName("p2");

    p3->setObjectName("p3");

    p4->setObjectName("p4");

    p1->setGeometry(QRectF(0.0, 0.0, 64.0, 64.0));

    p2->setGeometry(QRectF(236.0, 0.0, 64.0, 64.0));

    p3->setGeometry(QRectF(236.0, 236.0, 64.0, 64.0));

    p4->setGeometry(QRectF(0.0, 236.0, 64.0, 64.0));

    QGraphicsScene scene(0, 0, 300, 300);

    scene.setBackgroundBrush(Qt::white);

    scene.addItem(p1);

    scene.addItem(p2);

    scene.addItem(p3);

    scene.addItem(p4);

    QGraphicsView window(&scene);

    window.setFrameStyle(0);

    window.setAlignment(Qt::AlignLeft | Qt::AlignTop);

    window.setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

    window.setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

    QStateMachine machine;

    machine.setGlobalRestorePolicy(QStateMachine::RestoreProperties);

    QState *group = new QState(&machine);

    group->setObjectName("group");

    QRect selectedRect(86, 86, 128, 128);

    QState *idleState = new QState(group);

    group->setInitialState(idleState);

    QObjectList objects; 

    objects << p1 << p2 << p3 << p4;

    createStates(objects, selectedRect, group);

    createAnimations(objects, &machine);

    machine.setInitialState(group);

    machine.start();

    window.resize(300, 300);

    window.show();

    return app.exec();

}

#include "main.moc"