Marquee.java

package customnodes;

import java.io.IOException;

import application.tools.InfoTool;
import javafx.animation.Animation;
import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.beans.InvalidationListener;
import javafx.beans.property.StringProperty;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.layout.Pane;
import javafx.scene.shape.Rectangle;
import javafx.scene.text.Text;
import javafx.util.Duration;

/**
 * When the screen element is not big enough to show the text then an animation will start automatically
 * 
 * @author GOXR3PLUS
 *
 */
public class Marquee extends Pane {

    @FXML
    private Text text;

    // minimum distance to Pane bounds
    private static final double OFFSET = 5;

    private Timeline timeline = new Timeline();

    /**
     * Constructor
     */
    public Marquee() {

	// FXMLLOADER
	try {
	    FXMLLoader loader = new FXMLLoader(getClass().getResource(InfoTool.FXMLS + "Marquee.fxml"));
	    loader.setController(this);
	    loader.setRoot(this);
	    loader.load();
	} catch (IOException ex) {
	    ex.printStackTrace();
	}

    }

    /**
     * Called as soon as .fxml is initialized [[SuppressWarningsSpartan]]
     */
    @FXML
    private void initialize() {

	//Clip
	Rectangle rectangle = new Rectangle(25, 25);
	rectangle.widthProperty().bind(widthProperty());
	rectangle.heightProperty().bind(heightProperty());
	setClip(rectangle);

	// Text
	text.setManaged(false);

	startAnimation();
    }

    /**
     * This method changes the text of the Marquee
     * 
     * @param value
     * @return this
     */
    public Marquee setText(String value) {

	// text
	text.setText(value);

	return this;
    }

    /**
     * Defines text string that is to be displayed.
     * 
     * @return The TextProperty
     */
    public StringProperty textProperty() {
	return text.textProperty();
    }

    /**
     * This method starts the Animation of the marquee
     */
    private final void startAnimation() {

	// KeyFrame
	KeyFrame updateFrame = new KeyFrame(Duration.millis(35), new EventHandler<ActionEvent>() {

	    private boolean rightMovement;

	    @Override
	    public void handle(ActionEvent event) {
		double textWidth = text.getLayoutBounds().getWidth();
		double paneWidth = getWidth();
		double layoutX = text.getLayoutX();

		if (2 * OFFSET + textWidth <= paneWidth && layoutX >= OFFSET) {
		    // stop, if the pane is large enough and the position is
		    // correct
		    text.setLayoutX(OFFSET);
		    timeline.stop();
		} else {
		    if ((rightMovement && layoutX >= OFFSET) || (!rightMovement && layoutX + textWidth + OFFSET <= paneWidth)) {
			// invert movement, if bounds are reached
			rightMovement = !rightMovement;
		    }

		    // update position
		    if (rightMovement) {
			layoutX += 1;
		    } else {
			layoutX -= 1;
		    }
		    text.setLayoutX(layoutX);
		}
	    }
	});
	timeline.getKeyFrames().add(updateFrame);
	timeline.setCycleCount(Animation.INDEFINITE);

	// listen to bound changes of the elements to start/stop the
	// animation
	InvalidationListener listener = o -> {
	    double textWidth = text.getLayoutBounds().getWidth();
	    double paneWidth = getWidth();
	    text.setLayoutX(5);
	    if (textWidth + 2 * OFFSET > paneWidth && timeline.getStatus() != Animation.Status.RUNNING)
		timeline.play();
	};

	text.layoutBoundsProperty().addListener(listener);
	widthProperty().addListener(listener);

    }

}