QGraphicsScene drag event

[rbp]

I figured it out!!

To support drag events for QGraphicsScene you must allow drops on the scene

setAcceptDrops(true);

setAcceptDrops(true);

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create a QDrag object with mime data in the mousePressEvent()

QDrag *drag = new QDrag(this);
drag->setMimeData(new QMimeData()); // does not work without mime data
drag->exec();

QDrag *drag = new QDrag(this);
drag->setMimeData(new QMimeData()); // does not work without mime data
drag->exec();

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and accept the drag event in dragEnterEvent()

void dragEnterEvent(QDragEnterEvent *event) {
	event->acceptProposedAction();
}

void dragEnterEvent(QDragEnterEvent *event) {
	event->acceptProposedAction();
}

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Then you can catch the dragMoveEvent()

Phew - that's a lot of work. I would certainly prefer if mouseMoveEvent() still worked when the mouse button was down.