clojure-minimal-javafx

A Clojure application that implements the very short program defined in the JavaDocs for javafx.application.Application:

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;

public class MyApp extends Application {
    public void start(Stage stage) {
        Circle circ = new Circle(40, 40, 30);
        Group root = new Group(circ);
        Scene scene = new Scene(root, 400, 300);

        stage.setTitle("My JavaFX Application");
        stage.setScene(scene);
        stage.show();
    }
}

Code Notes

• The addition of :main and :aot to project.clj is required due to the self-reference in the -main function.
• The Java code uses a variadic argument constructor for javafx.scene.Group. In Clojure, it is challenging to invoke this constructor. Instead, the no-argument constructor is used, and the circle is added post-creation.
• The generated Application class needs to be passed to launch() as functions are inner classes in Java. Also, hyphens in namespaces are converted to underscores for packages and files.

Usage

   lein run

License

Copyright © 2018 Benito Gonzalez

Distributed under the Eclipse Public License.