Java – How to get JavaFX nodes (textarea, textfield) to resize correctly when user drags to resize the stage window

javajavafx

How to get JavaFX nodes (textarea, textfield) to resize correctly when user drags to resize the stage window?

I have a piece of code that creates a stage VBox with two nodes (TextArea, TextField). However, when the user drags to resize the window, these components are not dragged in proportion. Please see the pictures:

before resize after resizing

Here is my code, any suggestions on how to implement a fix so that the textfield is always at the bottom, and textarea expands to fill up the white space? Thanks!

Stage stage = new Stage();  
VBox root = new VBox();
textArea = new TextArea();
textField = new TextField();
root.getChildren().addAll(textArea, textField);
textArea.setStyle("-fx-background-color: DARKGRAY;"
    + "-fx-text-fill: BLACK;"
    + "-fx-font-size: 14pt;");
textArea.setPrefSize(400, 316);
textArea.setEditable(false);
textArea.setWrapText(true);
textField.setStyle("-fx-background-color: DARKGRAY;"
    + "-fx-text-fill: BLACK;"
    + "-fx-font-size: 14pt;");

Best Answer

With a VBox, the components will take just enough space, vertically, to fit. After that, increase in size of the Stage does not make a difference.

Use BorderPane. If you have used Swing, this is like BorderLayout. This will let you place your components on the borders of the Stage and at the center and these components will stay where they are even after resizing.

SSCCE: 

package stack;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.TextArea;
import javafx.scene.control.TextField;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

public class TextfieldAdjust extends Application {

    Scene scene;
    TextArea area;
    TextField field;
    BorderPane border;

    @Override
    public void start(Stage stage) throws Exception {
        border = new BorderPane();
        scene = new Scene(border);

        area = new TextArea();
        field = new TextField();

        area.setStyle("-fx-background-color: DARKGRAY;"
                + "-fx-text-fill: BLACK;"
                + "-fx-font-size: 14pt;");
        field.setStyle("-fx-background-color: WHEAT;"
                + "-fx-text-fill: BLACK;"
                + "-fx-font-size: 14pt;");

        border.setCenter(area);
        border.setBottom(field);

        stage.setScene(scene);
        stage.sizeToScene();
        stage.show();
    }
    public static void main(String[] args) {
        Application.launch("stack.TextFieldAdjust");
    }
}
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