import java.util.concurrent.CountDownLatch;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;
import javafx.application.Platform;
import javafx.scene.ImageCursor;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.PixelReader;
import javafx.scene.image.PixelWriter;
import javafx.scene.image.WritableImage;
import javafx.scene.paint.Color;

public class FadingRectangle extends Application {

    FadingCursor fade = new FadingCursor();

    @Override
    public void start(Stage primaryStage) throws Exception {

        primaryStage.setWidth(300);
        primaryStage.setHeight(300);

        Scene scene = new Scene(new FlowPane());

        primaryStage.setScene(scene);

        fade.startFade(scene,100);

        primaryStage.show();
    }

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

}

class FadingCursor {

    private int counter;

    /**
     * Start fading the Cursor
     *
     * @param scene
     */
    public void startFade(Scene scene, int millisecondsDelay) {

        // Create a Thread
        new Thread(() -> {

            counter = 100;
            for (; counter >= 0; counter--) {
                CountDownLatch count = new CountDownLatch(1);
                Platform.runLater(() -> {

                    // Create the fading image
                    WritableImage writable = new WritableImage(64, 64);
                    PixelWriter pixelWriter = writable.getPixelWriter();

                    // Fade out the image
                    for (int readY = 0; readY < 64; readY++) {
                        for (int readX = 0; readX < 64; readX++) {
                            Color color = new Color(1.0, 1.0, 1.0, (counter / 100.00));
                            pixelWriter.setColor(readX, readY, color);
                        }
                    }

                    System.out.println("With counter:"+counter+" opacity is:" + writable.getPixelReader().getColor(32, 32).getOpacity());

                    scene.setCursor(new ImageCursor(writable));
                    count.countDown();
                });
                try {
                    // Wait JavaFX Thread to change the cursor
                    count.await();
                    // Sleep some time
                    Thread.sleep(millisecondsDelay);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

            }

        }).start();

    }

}