How to Make a Resizable JavaFX Application with Font and Image Size Constraints

Question

Can someone help me with the code and example of  How to Make a Resizable JavaFX Application with Font and Image Size Constraints?

Answer 1

To create a resizable JavaFX application with font and image size constraints, you can use layout panes (e.g., BorderPane, VBox, HBox) and bind properties to dynamically adjust font and image sizes based on the window size. Here's how:

Steps to Create a Resizable JavaFX Application
Use Layout Panes:
Use layout panes like BorderPane, VBox, or HBox to organize UI components.
These panes automatically resize their children when the window is resized.

Bind Font Size:
Bind the font size of text elements (e.g., Label, Button) to the window size using Bindings or ChangeListener.

Bind Image Size:
Use an ImageView and bind its fitWidth and fitHeight properties to the window size.

Add Constraints:
Set minimum and maximum font/image sizes to ensure they don't become too small or too large.

Example Code

import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
public class ResizableApp extends Application {
    @Override
    public void start(Stage primaryStage) {
        // Create a layout pane
        BorderPane root = new BorderPane();
        // Create a label with resizable font
        Label label = new Label("Resizable Text");
        root.setCenter(label);
        // Bind font size to window height
        label.styleProperty().bind(
            Bindings.concat("-fx-font-size: ", root.heightProperty().divide(10))
        );
        // Load an image and make it resizable
        Image image = new Image("https://example.com/image.png");
        ImageView imageView = new ImageView(image);
        imageView.setPreserveRatio(true);
        root.setBottom(imageView);
        // Bind image size to window width and height
        imageView.fitWidthProperty().bind(root.widthProperty().divide(2));
        imageView.fitHeightProperty().bind(root.heightProperty().divide(2));
        // Set minimum and maximum font/image sizes
        label.styleProperty().addListener((obs, oldVal, newVal) -> {
            double fontSize = root.getHeight() / 10;
            if (fontSize < 12) fontSize = 12; // Minimum font size
            if (fontSize > 48) fontSize = 48; // Maximum font size
            label.setStyle("-fx-font-size: " + fontSize + ";");
        });
        // Create a scene and show the stage
        Scene scene = new Scene(root, 600, 400);
        primaryStage.setScene(scene);
        primaryStage.setTitle("Resizable JavaFX App");
        primaryStage.show();
    }
    public static void main(String[] args) {
        launch(args);
    }
}