import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.input.*;
import javafx.scene.layout.HBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Ellipse;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

import java.util.Collections;
import java.util.List;

public class SimpleDragApp extends Application {

    public static DragEvent lastDragOverEvent;
    public static final String TITLE1 = "DragEventTest";
    public static final String TITLE2 = "SecondStage";
    public static final String ID_CIRCLE = "Circle";
    public static final String ID_ELLIPSE = "Ellipse";
    public static final String ID_RECTANGLE = "Rectangle";
    public static final String PARAM_TWO_STAGE = "TwoStage";

    private Parent getContent() {
        HBox list = new HBox();
        final Rectangle rect = new Rectangle(50, 50, Color.BLUE);
        rect.setId(ID_RECTANGLE);
        rect.setOnDragDetected(new EventHandler<MouseEvent>() {

            @Override
            public void handle(MouseEvent t) {
                Dragboard db = rect.startDragAndDrop(TransferMode.ANY);
                ClipboardContent content = new ClipboardContent();
                content.putString("Hello World");
                db.setContent(content);
                t.consume();
                System.out.println("Drag detected");
                System.out.format("SceneX = %.2f, SceneY = %.2f\n", t.getSceneX(), t.getSceneY());
                System.out.format("ScreenX = %.2f, ScreenY = %.2f\n", t.getScreenX(), t.getScreenY());
            }
        });
        list.getChildren().addAll(rect);

        Rectangle target = new Rectangle(50, 50, Color.YELLOW);
        //target.setId(ID_ELLIPSE);
        //target.setFill(Color.BLUEVIOLET);
        target.setOnDragOver(new EventHandler<DragEvent>() {

            @Override
            public void handle(DragEvent t) {
                lastDragOverEvent = t;
                t.acceptTransferModes(TransferMode.ANY);
            }
        });
        target.setOnDragDropped(new EventHandler<DragEvent>() {

            @Override
            public void handle(DragEvent t) {
                t.setDropCompleted(true);
                System.out.println("Drag dropped");
                System.out.println("sceneX " + t.getSceneX() + ", sceneY " + t.getSceneY());
                System.out.println("screenX " + t.getScreenX() + ", screenY " + t.getScreenY());
                System.out.println("X " + t.getX() + ", Y " + t.getY());

                System.out.println("Last drag over event");
                System.out.println("sceneX " + lastDragOverEvent.getSceneX() + ", sceneY " + lastDragOverEvent.getSceneY());
                System.out.println("screenX " + lastDragOverEvent.getScreenX() + ", screenY " + lastDragOverEvent.getScreenY());
                System.out.println("X " + lastDragOverEvent.getX() + ", Y " + lastDragOverEvent.getY());
            }
        });
        list.getChildren().add(target);


        return list;
    }

    public void start(Stage stage) {
        stage.setX(100);
        stage.setY(100);
        stage.setWidth(200);
        stage.setHeight(200);
        stage.setTitle(TITLE1);
        Scene scene = new Scene(getContent(), 400, 400);
        stage.setScene(scene);
        stage.show();
        Parameters params = getParameters();
        List<String> parameters;
        parameters = params == null ? Collections.<String>emptyList() : params.getRaw();
        if (parameters.size() > 0 && PARAM_TWO_STAGE.equals(parameters.get(0))) {
            Stage stage2 = new Stage();
            stage2.setTitle(TITLE2);
            stage2.setScene(new Scene(new Group(getContent2())));
            stage2.show();
        }
    }

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

    private Node getContent2() {
        Group list = new Group();
        Circle circle = new Circle(150, 50, 25, Color.RED);
        circle.setId(ID_CIRCLE);
        circle.setOnDragOver(new EventHandler<DragEvent>() {

            @Override
            public void handle(DragEvent t) {
                lastDragOverEvent = t;
                t.acceptTransferModes(TransferMode.ANY);
            }
        });
        circle.setOnDragDropped(new EventHandler<DragEvent>() {

            @Override
            public void handle(DragEvent t) {
                t.setDropCompleted(true);
            }
        });
        list.getChildren().add(circle);
        return list;
    }
}