[更新]
最後管理它自己:
/* The 'sceneRoot' object is the root Node of the scene graph
* stage.setScene(new Scene(sceneRoot, 1280, 1024));
*/
private ImageView dragImageView = new ImageView();
private Node dragItem;
_
rightPane.setOnMouseDragEntered(new EventHandler<MouseDragEvent>() {
public void handle(MouseDragEvent e) {
rightPane.setStyle("-fx-border-color:red;-fx-border-width:2;-fx-border-style:solid;");
e.consume();
}
});
rightPane.setOnMouseDragExited(new EventHandler<MouseDragEvent>() {
public void handle(MouseDragEvent e) {
rightPane.setStyle("-fx-border-style:none;");
e.consume();
}
});
rightPane.setOnMouseDragReleased(new EventHandler<MouseDragEvent>() {
public void handle(MouseDragEvent e) {
//TODO: add new instance of dragItem to rightPane
e.consume();
}
});
_
private void addGesture(final Node node) {
node.setOnDragDetected(new EventHandler<MouseEvent>() {
public void handle(MouseEvent e) {
SnapshotParameters snapParams = new SnapshotParameters();
snapParams.setFill(Color.TRANSPARENT);
dragImageView.setImage(node.snapshot(snapParams, null));
sceneRoot.getChildren().add(dragImageView);
dragImageView.startFullDrag();
e.consume();
}
});
node.setOnMouseDragged(new EventHandler<MouseEvent>() {
public void handle(MouseEvent e) {
Point2D localPoint = sceneRoot.sceneToLocal(new Point2D(e.getSceneX(), e.getSceneY()));
dragImageView.relocate(
(int)(localPoint.getX() - dragImageView.getBoundsInLocal().getWidth()/2),
(int)(localPoint.getY() - dragImageView.getBoundsInLocal().getHeight()/2)
);
e.consume();
}
});
node.setOnMouseEntered(new EventHandler<MouseEvent>() {
public void handle(MouseEvent e) {
node.setCursor(Cursor.HAND);
}
});
node.setOnMousePressed(new EventHandler<MouseEvent>() {
public void handle(MouseEvent e) {
dragItem = node;
dragImageView.setMouseTransparent(true);
node.setMouseTransparent(true);
node.setCursor(Cursor.CLOSED_HAND);
}
});
node.setOnMouseReleased(new EventHandler<MouseEvent>() {
public void handle(MouseEvent e) {
dragItem = null;
dragImageView.setMouseTransparent(false);
node.setMouseTransparent(false);
node.setCursor(Cursor.DEFAULT);
sceneRoot.getChildren().remove(dragImageView);
}
});
}
好的工作。計劃在未來版本中添加[drag view feature](http://javafx-jira.kenai.com/browse/RT-14730?focusedCommentId=317064#)到JavaFX平臺,可能是jdk8。 – jewelsea
我嘗試重新實現ListView的解決方案,但不知道setOnDragDetected處理程序中的場景變量是什麼類型。它不是Scene,因爲Scene沒有getChildern()方法。 – andreas
'場景'對象實際上是場景圖的根節點。我已經更新了我的代碼,並通過sceneRoot更名爲了更好的理解。感謝您突出顯示;) – Badisi