JavaFx can't get the node coordinate relative to scene

Question

My code:

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());

Print:

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]]

My question is: When I get the coordinate of btn1, the MinX and MinY is 0, I can understand. but about btn2, the MinY should not be 0; and MaxX and MaxY also should not be 0. So how can I get the real coordinate of the left corner of the button in the VBox. To be clear, I need the coordinate of the node which is relative to VBox. Thanks.

Move your `System.out.println()` statements after `primaryStage.show()`. — SedJ601, Oct 02 '17 at 02:59
Size and position are assigned during a layout pass, which has not happened in your code. — fabian, Oct 02 '17 at 04:42

score 1 · Answer 1 · edited Oct 02 '17 at 03:09

1

I believe you have to get the parent bounds and then specify what you want relative to those.

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

edited Oct 02 '17 at 03:09

Aniruddha Das

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answered Oct 02 '17 at 02:58

Aaron

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JavaFx can't get the node coordinate relative to scene

1 Answers1