JavaFx鼠标事件

import javafx.application.Application;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.scene.Scene;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.Pane;
import javafx.scene.text.Text;
import javafx.stage.Stage;

public class App15_4 extends Application {

    private double tOffX, tOffy;
    Text t = new Text(20, 20, "拖动我");

    @Override
    public void start(Stage primaryStage) {

        Pane pane = new Pane();
        pane.getChildren().add(t);

        t.setOnMousePressed(e -> HandleMousePressed(e));
        t.setOnMouseDragged(e -> HandleMouseDragged(e));


        Scene scene = new Scene(pane, 800, 600);
        primaryStage.setScene(scene);
        primaryStage.setTitle("拖动操作");
        primaryStage.show();

    }

    private void HandleMousePressed(MouseEvent e) {
        tOffX = e.getSceneX() - t.getX();
        tOffy = e.getSceneY() - t.getY();
    }

    private void HandleMouseDragged(MouseEvent e) {
//        t.setX(e.getSceneX() - tOffX);
//        t.setY(e.getSceneY() - tOffy);
        t.xProperty().bind(new SimpleDoubleProperty(e.getSceneX() - tOffX));
        t.yProperty().bind(new SimpleDoubleProperty(e.getSceneY() - tOffy));
    }

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