How to corectly obtain the outer bounds of a node in JavaFX - javafx

Question

I am trying to manually align nodes on a JavaFX Pane, but can't seem to be able to get the actual outer bounds of the nodes.
I don't know how better to explain the problem than by showing the following example I created to demonstrate it:
This window is generated by the following code:
public class JavaFXMWE extends Application {
private Pane root;
#Override
public void start(Stage primaryStage) {
root = new Pane();
normal();
bold();
inStackPane();
inStackPaneWithInsets();
Scene scene = new Scene(root, 300, 250);
primaryStage.setTitle("MWE");
primaryStage.setScene(scene);
primaryStage.show();
}
private void normal() {
Text text1 = new Text("Some Text");
Text text2 = new Text("Some other Text");
text1.relocate(20, 20);
text2.relocate(text1.getBoundsInParent().getMaxX(), 20);
root.getChildren().addAll(text1, text2);
}
private void bold() {
Text text1 = new Text("Some Text");
Text text2 = new Text("Some other Text");
text1.setStyle("-fx-font-weight: bold");
text2.setStyle("-fx-font-weight: bold");
text1.relocate(20, 40);
text2.relocate(text1.getBoundsInParent().getMaxX(), 40);
root.getChildren().addAll(text1, text2);
}
private void inStackPane() {
Text text1 = new Text("Some Text");
Text text2 = new Text("Some other Text");
StackPane pane1 = new StackPane(text1);
StackPane pane2 = new StackPane(text2);
setBorder(pane1);
setBorder(pane2);
pane1.relocate(20, 60);
pane2.relocate(pane1.getBoundsInParent().getMaxX(), 60);
root.getChildren().addAll(pane1, pane2);
}
private void inStackPaneWithInsets() {
Text text1 = new Text("Some Text");
Text text2 = new Text("Some other Text");
StackPane pane1 = new StackPane(text1);
StackPane pane2 = new StackPane(text2);
setBorderAndInsets(pane1);
setBorderAndInsets(pane2);
pane1.relocate(20, 85);
pane2.relocate(pane1.getBoundsInParent().getMaxX(), 85);
root.getChildren().addAll(pane1, pane2);
}
private static void setBorder(Region node) {
node.setBorder(new Border(new BorderStroke(Color.BLACK,
BorderStrokeStyle.SOLID, CornerRadii.EMPTY, BorderWidths.DEFAULT)));
}
private static void setBorderAndInsets(Region node) {
setBorder(node);
node.setPadding(new Insets(5));
}
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
How do I obtain the actual outer bounds of the nodes?

Answer 1

The CSS style is applied just before the first layout pass. The style property has no effect on the node until this happens. For this reason positioning children yourself is best done by overriding the layoutChildren method; this method is invoked during the layout pass. Alternatively you could add a listener to the boundsInParent property.
#Override
public void start(Stage primaryStage) throws Exception {
Text text1 = new Text("Some Text");
Text text2 = new Text("Some other Text");
text1.setStyle("-fx-font-weight: bold");
text2.setStyle("-fx-font-weight: bold");
Pane root = new Pane(text1, text2) {
#Override
protected void layoutChildren() {
text1.relocate(20, 40);
text2.relocate(text1.getLayoutX() + text1.prefWidth(-1), 40); // using text1.boundsInParent would work too, usually the size constraints returned by the minWidth, prefWidth and maxWidth methods should be used
}
};
Scene scene = new Scene(root, 300, 300);
primaryStage.setScene(scene);
primaryStage.show();
}