Visibility and the children of pane

I tried to change children in a pane, but it did not work.  I want to do the following:

(1) Pane.setVisible (false);

(2) Pane.getChildren () .clear ();

(3) Pane.getChildren () .add (new children);

(4) Pane.setVisible (true);

I do that all the time with swing, but it doesn't seem to work with FX.

Set visible (false) does not work until the other code is run.

The component is never visible again so I don't know if the children actually change.

Surrounding the code for debugging works fine.

Thanks for any advice.

You intend to call these one immediately after the other? It is unclear if this is the case, what would the purpose of the calls to the setVisible().

Note that you can also do

pane.getChildren().setAll(newChildren);

which is equivalent to steps 2 and 3.

Here's a quick example:

import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.RadioButton;
import javafx.scene.control.TextField;
import javafx.scene.control.Toggle;
import javafx.scene.control.ToggleGroup;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
//
public class UpdatePaneTest extends Application {
//
    @Override
    public void start(Stage primaryStage) {
        final GridPane pane = new GridPane();
        pane.setPadding(new Insets(10));
        pane.setHgap(10);
        pane.setVgap(10);
//
        final Label fnPrompt = new Label("First Name:");
        final Label lnPrompt = new Label("Last Name:");
//
        final Label firstNameLabel = new Label();
        final Label lastNameLabel = new Label();
//
        final TextField firstNameTextField = new TextField();
        final TextField lastNameTextField = new TextField();
//
        firstNameLabel.textProperty().bind(firstNameTextField.textProperty());
        lastNameLabel.textProperty().bind(lastNameTextField.textProperty());
//
        GridPane.setConstraints(fnPrompt, 0, 0);
        GridPane.setConstraints(lnPrompt, 0, 1);
        GridPane.setConstraints(firstNameLabel, 1, 0);
        GridPane.setConstraints(lastNameLabel, 1, 1);
        GridPane.setConstraints(firstNameTextField, 1, 0);
        GridPane.setConstraints(lastNameTextField, 1, 1);
//
        final RadioButton viewRadio = new RadioButton("View");
        final RadioButton editRadio = new RadioButton("Edit");
        ToggleGroup toggles = new ToggleGroup();
        toggles.getToggles().addAll(viewRadio, editRadio);
        HBox radios = new HBox(5);
        radios.setPadding(new Insets(10));
        radios.getChildren().addAll(viewRadio, editRadio);
//
        // change displayed nodes when radio buttons are selected:
        toggles.selectedToggleProperty().addListener(
            new ChangeListener() {
                @Override
                public void changed(ObservableValue obs, Toggle oldToggle, Toggle newToggle) {
                    if (newToggle == viewRadio) {
                        pane.getChildren().setAll(fnPrompt, lnPrompt, firstNameLabel, lastNameLabel);
                    } else if (newToggle == editRadio) {
                        pane.getChildren().setAll(fnPrompt, lnPrompt, firstNameTextField, lastNameTextField);
                    }
                }
            }
        );
//
        editRadio.setSelected(true);
//
        BorderPane root = new BorderPane();
        root.setCenter(pane);
        root.setBottom(radios);
//
        Scene scene = new Scene(root, 300, 180);
        primaryStage.setScene(scene);
        primaryStage.show();
    }
//
    public static void main(String[] args) {
        launch(args);
    }
}

Tags: Java

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