imageitem.cpp Example File

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  #include "imageitem.h"

  ImageItem::ImageItem(int id, const QPixmap &pixmap, QGraphicsItem *parent)
      : QGraphicsPixmapItem(pixmap, parent)
  {
      recordId = id;
      setAcceptHoverEvents(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();

      setTransform(QTransform::fromTranslate(center.x(), center.y()), true);
      setTransform(QTransform::fromScale(1 + frame / 330.0, 1 + frame / 330.0), true);
      setTransform(QTransform::fromTranslate(-center.x(), -center.y()), true);
  }

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

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

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