ProgressiveImageView.java

import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;

public class ProgressiveImageView extends ImageView {
    public ProgressiveImageView(final String image, String placeholder) {
        final Image img = new Image(image, true);
        img.progressProperty().addListener(new ChangeListener<Number>() {
            public void changed(ObservableValue ov,
                                Number old_val, Number new_val) {
                new_val = new_val.doubleValue() * 100.0;
                if (new_val.doubleValue() == 100.0) {
                    System.out.println("Loading image: " + image);
                    setImage(img);
                }
            }
        });
        System.out.println("Loading placeholder: " + placeholder);
        setImage(new Image(placeholder));
    }
}