import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.input.ClipboardContent;
import javafx.scene.input.DragEvent;
import javafx.scene.input.Dragboard;
import javafx.scene.input.MouseEvent;
import javafx.scene.input.TransferMode;
import javafx.scene.paint.Color;
import javafx.scene.text.Text;
import javafx.stage.Stage;

/**
 * • Demonstrates a drag-and-drop feature.
 */
public class Test extends Application {
	@Override
	public void start(Stage stage) {
		stage.setTitle("Hello Drag And Drop");
		Group root = new Group();
		Scene scene = new Scene(root, 400, 200);
		scene.setFill(Color.LIGHTGREEN);

		final Text source = new Text(50, 100, "DRAG ME");
		source.setScaleX(2.0);
		source.setScaleY(2.0);

		final Text target = new Text(250, 100, "DROP HERE");
		target.setScaleX(2.0);
		target.setScaleY(2.0);

		source.setOnDragDetected(new EventHandler<MouseEvent>() {
			public void handle(MouseEvent event) {
				/* drag was detected, start drag-and-drop gesture */
				System.out.println("onDragDetected");

				/* allow any transfer mode */
				Dragboard db = source.startDragAndDrop(TransferMode.ANY);

				/* put a string on dragboard */
				ClipboardContent content = new ClipboardContent();
				content.putString(source.getText());
				db.setContent(content);

				event.consume();
			}
		});

		target.setOnDragOver(new EventHandler<DragEvent>() {
			public void handle(DragEvent event) {
				/* data is dragged over the target */
				System.out.println("onDragOver");

				/*
				 * accept it only if it is not dragged from the same node and if it has a string
				 * data
				 */
				if (event.getGestureSource() != target && event.getDragboard().hasString()) {
					/* allow for both copying and moving, whatever user chooses */
					event.acceptTransferModes(TransferMode.COPY_OR_MOVE);
				}

				event.consume();
			}
		});

		target.setOnDragEntered(new EventHandler<DragEvent>() {
			public void handle(DragEvent event) {
				/* the drag-and-drop gesture entered the target */
				System.out.println("onDragEntered");
				/* show to the user that it is an actual gesture target */
				if (event.getGestureSource() != target && event.getDragboard().hasString()) {
					target.setFill(Color.GREEN);
				}

				event.consume();
			}
		});

		target.setOnDragExited(new EventHandler<DragEvent>() {
			public void handle(DragEvent event) {
				/* mouse moved away, remove the graphical cues */
				target.setFill(Color.BLACK);

				event.consume();
			}
		});

		target.setOnDragDropped(new EventHandler<DragEvent>() {
			public void handle(DragEvent event) {
				/* data dropped */
				System.out.println("onDragDropped");
				/* if there is a string data on dragboard, read it and use it */
				Dragboard db = event.getDragboard();
				boolean success = false;
				if (db.hasString()) {
					target.setText(db.getString());
					success = true;
				}
				/*
				 * let the source know whether the string was successfully transferred and used
				 */
				event.setDropCompleted(success);

				event.consume();
			}
		});

		source.setOnDragDone(new EventHandler<DragEvent>() {
			public void handle(DragEvent event) {
				/* the drag-and-drop gesture ended */
				System.out.println("onDragDone");
				/* if the data was successfully moved, clear it */
				if (event.getTransferMode() == TransferMode.MOVE) {
					source.setText("");
				}

				event.consume();
			}
		});

		root.getChildren().add(source);
		root.getChildren().add(target);
		stage.setScene(scene);

// Addition to demonstrate issue
		stage.setOnCloseRequest(e -> new Alert(Alert.AlertType.CONFIRMATION).showAndWait());
		stage.show();
	}

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