imageitem.cpp Example File
drilldown/imageitem.cpp
#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, &QTimeLine::frameChanged, this, &ImageItem::setFrame);
connect(&timeLine, &QTimeLine::finished, this, &ImageItem::updateItemPosition);
adjust();
}
void ImageItem::hoverEnterEvent(QGraphicsSceneHoverEvent * )
{
timeLine.setDirection(QTimeLine::Forward);
if (z != 1.0) {
z = 1.0;
updateItemPosition();
}
if (timeLine.state() == QTimeLine::NotRunning)
timeLine.start();
}
void ImageItem::hoverLeaveEvent(QGraphicsSceneHoverEvent * )
{
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() const
{
return recordId;
}
void ImageItem::updateItemPosition()
{
setZValue(z);
}