MDI Javafx Window: how to make an Anchorpane responsive to Anchorpane Parent

Question

I want to know how to make my Anchorpane internal responsive example: i have a main screen and on this main screen has a configuration button.

When I click this button, opens another Anchorpane inside the main Anchorpane. The problem is that when the internal Anchorpane is opened, it does not get the size of the parent Anchorpane, that is, if I resize the Main Anchorpane, the Anchorpane inside it does not resize together, it gets the standard size that is in my Scenebuilder.

How can I make my internal Anchorpane resize together with the main Anchorpane?

This is the code of the button that adds the internal Anchorpane

 @FXML
 private AnchorPane adicionarTela; 

@FXML
    public void abrirTelaConficuracao() throws IOException, Exception {
        AnchorPane a = (AnchorPane) FXMLLoader.load(getClass().getResource("TelaConfiguracao.fxml"));
        adicionarTela.getChildren().add(a);

    }

Answer 1

You’re probably not setting the anchors. In FXML, just go to Scenebuilder in the Anchorpane Child Layout section:

Already in the code (which is your case), you will have to place the anchors manually:

AnchorPane a = (AnchorPane) FXMLLoader.load(getClass().getResource("TelaConfiguracao.fxml"));
adicionarTela.setTopAnchor(a, 0.0);
adicionarTela.setBottomAnchor(a, 0.0);
adicionarTela.setLeftAnchor(a, 0.0);
adicionarTela.setRightAnchor(a, 0.0);

adicionarTela.getChildren().add(a);