JavaFx无法获取相对于场景[duplicate]的节点坐标

Question

我的代码：

Button btn1 = new Button("Button");
    Button btn2 = new Button("The second Button");


    VBox vbox = new VBox();
    vbox.getChildren().addAll(btn1,btn2);
    Scene scene = new Scene(vbox, 300, 300);

    System.out.println(btn2.getBoundsInLocal());
    System.out.println(btn2.getBoundsInParent());
    System.out.println(btn2.getLayoutBounds());
    System.out.println(btn2.layoutBoundsProperty());

打印：

BoundingBox [minX:0.0, minY:0.0, minZ:0.0, width:0.0, height:0.0, depth:0.0, maxX:0.0, maxY:0.0, maxZ:0.0]
BoundingBox [minX:0.0, minY:0.0, minZ:0.0, width:0.0, height:0.0, depth:0.0, maxX:0.0, maxY:0.0, maxZ:0.0]
BoundingBox [minX:0.0, minY:0.0, minZ:0.0, width:0.0, height:0.0, depth:0.0, maxX:0.0, maxY:0.0, maxZ:0.0]
ReadOnlyObjectProperty [bean: Button@5f3c42b9[styleClass=button]'The second Button', name: layoutBounds, value: BoundingBox [minX:0.0, minY:0.0, minZ:0.0, width:0.0, height:0.0, depth:0.0, maxX:0.0, maxY:0.0, maxZ:0.0]]

我的问题是：当我得到btn1的坐标时，MinX和MinY是0，我能理解。但对于btn2，MinY不应为0；MaxX和MaxY也不应该是0。那么，如何在VBox中获取按钮左角的真实坐标呢。为了清楚起见，我需要节点相对于VBox的坐标。谢谢

Answer 1

我认为您必须获得父边界，然后指定您想要相对于这些边界的内容。

System.out.println(btn2.getBoundsInParent().getY());
System.out.println(btn2.getBoundsInParent().getX());