JavaFX Tutorial - JavaFX BorderPane








The BorderPane layouts child nodes in a top, bottom, left, right, or center region. Each region can only have one node.

A BorderPane's top and bottom region allows a resizable node to take up all of the available width.

The left and right border regions take up the available vertical space between the top and bottom borders.

All of the bordering regions honor the children's preferred width and height by default.

The default alignment of nodes when placed in the top, bottom, left, right, and center regions is as follows:

  • Top: Pos.TOP_LEFT
  • Bottom: Pos.BOTTOM_LEFT
  • Left: Pos.TOP_LEFT
  • Right: Pos.TOP_RIGHT
  • Center: Pos.CENTER




Example

Add Button to BorderPane 

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
/*from w  ww  .ja va2 s  . com*/
public class Main extends Application {
  public static void main(String[] args) {
    Application.launch(args);
  }

  @Override
  public void start(Stage primaryStage) {
    primaryStage.setTitle("BorderPane Test");
    BorderPane bp = new BorderPane();
    bp.setPadding(new Insets(10, 20, 10, 20));

    Button btnTop = new Button("Top");
    bp.setTop(btnTop);

    Button btnLeft = new Button("Left");
    bp.setLeft(btnLeft);

    Button btnCenter = new Button("Center");
    bp.setCenter(btnCenter);

    Button btnRight = new Button("Right");
    bp.setRight(btnRight);

    Button btnBottom = new Button("Bottom");
    bp.setBottom(btnBottom);

    Scene scene = new Scene(bp, 300, 200);
    primaryStage.setScene(scene);
    primaryStage.show();
  }
}

The code above generates the following result.

null




Example 2

Bind BorderPane width and height with Scene 

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import javafx.scene.layout.BorderPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
/*from  ww w .j a  v  a 2 s .  c o  m*/
public class Main extends Application {

    public static void main(String[] args) {
        Application.launch(args);
    }

    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("Title");
        Group root = new Group();
        Scene scene = new Scene(root, 400, 250, Color.WHITE);

        MenuBar menuBar = new MenuBar();
        EventHandler<ActionEvent> action = changeTabPlacement();

        Menu menu = new Menu("Direction");
        MenuItem left = new MenuItem("Left");

        left.setOnAction(action);
        menu.getItems().add(left);

        MenuItem right = new MenuItem("Right");
        right.setOnAction(action);
        menu.getItems().add(right);

        MenuItem top = new MenuItem("Top");
        top.setOnAction(action);
        menu.getItems().add(top);

        MenuItem bottom = new MenuItem("Bottom");
        bottom.setOnAction(action);
        menu.getItems().add(bottom);

        menuBar.getMenus().add(menu);

        BorderPane borderPane = new BorderPane();

        borderPane.prefHeightProperty().bind(scene.heightProperty());
        borderPane.prefWidthProperty().bind(scene.widthProperty());
        
        borderPane.setTop(menuBar);
        
        root.getChildren().add(borderPane);

        primaryStage.setScene(scene);
        primaryStage.show();
    }

    private EventHandler<ActionEvent> changeTabPlacement() {
        return new EventHandler<ActionEvent>() {

            public void handle(ActionEvent event) {
                MenuItem mItem = (MenuItem) event.getSource();
                String side = mItem.getText();
                if ("left".equalsIgnoreCase(side)) {
                    System.out.println("left");
                } else if ("right".equalsIgnoreCase(side)) {
                    System.out.println("right");
                } else if ("top".equalsIgnoreCase(side)) {
                    System.out.println("top");
                } else if ("bottom".equalsIgnoreCase(side)) {
                    System.out.println("bottom");
                }
            }
        };
    }
}

The code above generates the following result.

null