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imageitem.cpp Example File
sql/drilldown/imageitem.cpp

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 #include "imageitem.h"

 ImageItem::ImageItem(int id, const QPixmap &pixmap, QGraphicsItem *parent,
                      QGraphicsScene *scene)
     : QGraphicsPixmapItem(pixmap, parent, scene)
 {
     recordId = id;
     setAcceptsHoverEvents(true);

     timeLine.setDuration(150);
     timeLine.setFrameRange(0, 150);

     connect(&timeLine, SIGNAL(frameChanged(int)), this, SLOT(setFrame(int)));
     connect(&timeLine, SIGNAL(finished()), this, SLOT(updateItemPosition()));

     adjust();
 }

 void ImageItem::hoverEnterEvent(QGraphicsSceneHoverEvent * /*event*/)
 {
     timeLine.setDirection(QTimeLine::Forward);

     if (z != 1.0) {
         z = 1.0;
         updateItemPosition();
     }

     if (timeLine.state() == QTimeLine::NotRunning)
         timeLine.start();
 }

 void ImageItem::hoverLeaveEvent(QGraphicsSceneHoverEvent * /*event*/)
 {
     timeLine.setDirection(QTimeLine::Backward);
     if (z != 0.0)
         z = 0.0;

     if (timeLine.state() == QTimeLine::NotRunning)
         timeLine.start();
 }

 void ImageItem::setFrame(int frame)
 {
     adjust();
     QPointF center = boundingRect().center();

     translate(center.x(), center.y());
     scale(1 + frame / 330.0, 1 + frame / 330.0);
     translate(-center.x(), -center.y());
 }

 void ImageItem::adjust()
 {
     QMatrix matrix;
     matrix.scale(150/ boundingRect().width(), 120/ boundingRect().height());
     setMatrix(matrix);
 }

 int ImageItem::id()
 {
     return recordId;
 }

 void ImageItem::updateItemPosition()
 {
     setZValue(z);
 }