JavaFX8 startFullDrag() 无效

Question

I want to connect two circles by drag & drop.

Pane p = new Pane();

Circle c1 = new Circle(5);
c1.relocate(10,10);
c1.addEventFilter(MouseEvent.DRAG_DETECTED, e -> {
    c1.startFullDrag();
    System.out.println("started");
});

Circle c2 = new Circle(5);
c2.relocate(40,40);
c2.addEventFilter(DragEvent.ANY, e -> System.out.println("any") );
c2.addEventFilter(DragEvent.DRAG_ENTERED, e -> System.out.println("entered") );

p.getChildren().addAll(c1, c2);

That's what I tried.
When drag&dropping from the left circle c1 to the right circle c2 , the DRAG_DETECTED Event will work.
But the DragEvent.ANY or DragEvent.DRAG_ENTERED will not be triggered.

I also tried consuming mouse events in DRAG_DETECTED but that doesn't change anything either. I also tried using setOnDragEntered(EventHandler) and addEventHandler(EventType, EventHandler) instead of addEventFilter(EventType, EventHandler) but none works.

Why does c2 not receive any DragEvent s?

Answer 1

startFullDrag() will trigger MouseDragEvents, but not DragEvents.

replace addEventFilter(DragEvent.DRAG_ENTERED, ... ); with addEventFilter(MouseDragEvent.DRAG_ENTERED, ... );