我正在尝试为QGraphicsScene
实现拖放功能。以下是我已经重载的事件:
void TargetScene::dragEnterEvent(QGraphicsSceneDragDropEvent *event) {
bool acceptDrag = false;
const QMimeData* mime = event->mimeData();
// Is an image present?
if (mime->hasImage()) {
QImage img = qvariant_cast<QImage>(mime->imageData());
dragPix = QPixmap::fromImage(img);
acceptDrag = !dragPix.isNull();
}
event->setAccepted(acceptDrag);
}
void TargetScene::dropEvent(QGraphicsSceneDragDropEvent *event) {
// Add dragged pixmap to scene
QGraphicsPixmapItem* newPix = this->addPixmap(dragPix);
newPix->setPos(event->pos().x(), event->pos().y());
}
场景仍然无法 接受拖放。我猜这是因为我不能在我的
QGraphicsScene
上执行 setAcceptDrops(true)
。如何在图形场景中接受拖放?