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# customproxy.cpp Example File
demos/embeddeddialogs/customproxy.cpp

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     #include "customproxy.h"

     #include <QtGui>

     CustomProxy::CustomProxy(QGraphicsItem *parent, Qt::WindowFlags wFlags)
         : QGraphicsProxyWidget(parent, wFlags)
     {
         timeLine = new QTimeLine(250, this);
         connect(timeLine, SIGNAL(valueChanged(qreal)),
                 this, SLOT(updateStep(qreal)));
         connect(timeLine, SIGNAL(stateChanged(QTimeLine::State)),
                 this, SLOT(stateChanged(QTimeLine::State)));
     }

     QRectF CustomProxy::boundingRect() const
     {
         return QGraphicsProxyWidget::boundingRect().adjusted(0, 0, 10, 10);
     }

     void CustomProxy::paintWindowFrame(QPainter *painter, const QStyleOptionGraphicsItem *option,
                                        QWidget *widget)
     {
         QRectF br = boundingRect();
         painter->setPen(Qt::NoPen);
         painter->setBrush(QColor(0, 0, 0, 64));
         painter->drawPolygon(QPolygonF(br.adjusted(10, 10, 10, 10))
                              .intersected(br));
         QGraphicsProxyWidget::paintWindowFrame(painter, option, widget);
     }

     void CustomProxy::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
     {
         QGraphicsProxyWidget::hoverEnterEvent(event);
         scene()->setActiveWindow(this);
         if (timeLine->direction() != QTimeLine::Forward)
             timeLine->setDirection(QTimeLine::Forward);
         if (timeLine->state() == QTimeLine::NotRunning)
             timeLine->start();
     }

     void CustomProxy::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
     {
         QGraphicsProxyWidget::hoverLeaveEvent(event);
         if (timeLine->direction() != QTimeLine::Backward)
             timeLine->setDirection(QTimeLine::Backward);
         if (timeLine->state() == QTimeLine::NotRunning)
             timeLine->start();
     }

     void CustomProxy::updateStep(qreal step)
     {
         QRectF r = boundingRect();
         setTransform(QTransform()
                      .translate(r.width() / 2, r.height() / 2)
                      .rotate(step * 30, Qt::XAxis)
                      .rotate(step * 10, Qt::YAxis)
                      .rotate(step * 5, Qt::ZAxis)
                      .scale(1 + 1.5 * step, 1 + 1.5 * step)
                      .translate(-r.width() / 2, -r.height() / 2));
     }

     void CustomProxy::stateChanged(QTimeLine::State state)
     {
         if (state == QTimeLine::Running) {
             if (timeLine->direction() == QTimeLine::Forward)
                 setCacheMode(NoCache);
         } else if (state == QTimeLine::NotRunning) {
             if (timeLine->direction() == QTimeLine::Backward)
                 setCacheMode(DeviceCoordinateCache);
         }
     }