/**

 * 程序入口

 * @author Light

 */

public class JavaFXTest extends Application {

    @Override

    public void start(Stage stage) {

        stage.initStyle(StageStyle.TRANSPARENT);

        VBox root = new VBox();

        root.setId("root");

        // 引入样式

        root.getStylesheets().add(JavaFXTest.class.getResource("/resources/style.css").toString());

        //顶部

        VBox top = new VBox();

        top.setId("top");

        top.setPrefSize(300,26);

        // 标题栏

        AnchorPane title = new AnchorPane();

        Label close = new Label();

        close.setPrefWidth(33);

        close.setPrefHeight(26);

        close.setId("winClose");//winClose css样式Id

        title.getChildren().add(close);

        AnchorPane.setRightAnchor(close, 0.0);

        AnchorPane.setTopAnchor(close, 5.0);

        top.getChildren().add(title);

        // 内容

        VBox content = new VBox();

        content.setPrefWidth(300);

        content.setMinHeight(200);

        // 组装

        root.getChildren().addAll(top, content);

        Scene scene = new Scene(root);

        stage.setScene(scene);

        // 拖动监听器

        DragUtil.addDragListener(stage, top);

        // 显示

        stage.show();

    }

    /**

     * @param args the command line arguments

     */

    public static void main(String[] args) {

        launch(args);

    }

}

/**

 * 工具类

 * @author Light

 */

public class DragUtil {

     public static void addDragListener(Stage stage,Node root) {

        new DragListener(stage).enableDrag(root);

    }

}

/**

 * 拖拽监听器

 * @author Light

 */

public class DragListener implements EventHandler<MouseEvent> {

    private double xOffset = 0;

    private double yOffset = 0;

    private final Stage stage;

    public DragListener(Stage stage) {

        this.stage = stage;

    }

    @Override

    public void handle(MouseEvent event) {

        event.consume();

        if (event.getEventType() == MouseEvent.MOUSE_PRESSED) {

            xOffset = event.getSceneX();

            yOffset = event.getSceneY();

        } else if (event.getEventType() == MouseEvent.MOUSE_DRAGGED) {

            stage.setX(event.getScreenX() - xOffset);

            if(event.getScreenY() - yOffset < 0) {

                stage.setY(0);

            }else {

                stage.setY(event.getScreenY() - yOffset);

            }

        }

    }

    public void enableDrag(Node node) {

        node.setOnMousePressed(this);

        node.setOnMouseDragged(this);

    }

}