This is reproducible only with marina b05, not reproducible with franca.

HBox/VBox do not give correct value for boundsInLocal. To reproduce, run the below program. Click on the HBox which prints the value of boundsInLocal. Instead of giving a cumulative width of its nodes, boundsInLocal of HBox gives the width of only one node.

import javafx.stage.*;
import javafx.scene.*;
import javafx.scene.layout.*;
import javafx.scene.shape.*;
import javafx.scene.paint.*;
import javafx.scene.input.*;

var hBox: HBox = HBox {
    content: [Rectangle {
        x: 0
        y: 0
        width: 50
        height: 40
        fill: Color.BLUE
    }, Rectangle {
        x: 0
        y: 0
        width: 50
        height: 40
        fill: Color.RED
    }]
    onMousePressed: function(e: MouseEvent) {
        println("boundsInLocal {hBox.boundsInLocal}");
    }
};
var scene: Scene = Scene {
    content: hBox
};
Stage {
    scene: Scene {
        content: hBox
    }
    width: 200
    height: 200
};