package helloworld;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

import javafx.scene.Group;
import javafx.scene.input.MouseEvent;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;

import javafx.scene.text.Font;
import javafx.scene.text.FontWeight;
import javafx.scene.text.Text;

public class HelloWorldFX extends Application {

	@Override
	public void start(Stage stage) {
		String javaVersion = System.getProperty("java.version");
		String javafxVersion = System.getProperty("javafx.version");
		
		Circle circle = new Circle(300.0f, 200.0f, 50.0f);
		circle.setFill(Color.BLUE);
		circle.setStrokeWidth(20);

		//Set text
		Text text = new Text("Click on the circle to change its color");
		text.setFont(Font.font(null, FontWeight.BOLD, 20));
		text.setFill(Color.WHITE);
		text.setX(150);
		text.setY(50);

		//Setup the mouse event handler 
		EventHandler<MouseEvent> eventHandler = new EventHandler<MouseEvent>() {
			@Override
			public void handle(MouseEvent e) {
				System.out.println(String.format("Hello World running on JavaFX %s on top of Java %s", javafxVersion, javaVersion));
				if (circle.getFill().equals(Color.BLUE)) 
					circle.setFill(Color.RED);
				else
					circle.setFill(Color.BLUE);
			}
		};
		//Register the event filter 
		circle.addEventFilter(MouseEvent.MOUSE_CLICKED, eventHandler);

		//Add circle and text to a group
		Group root = new Group(circle, text);
		
		Scene scene = new Scene(root, 640, 480);
		scene.setFill(Color.WHITE);

		stage.setTitle("Color shifter");
		stage.setScene(scene);
		stage.show();
	}

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

}

module helloworldfx {
    requires javafx.controls;
    exports helloworld;
}