Javafx Checker游戏

Question

我需要使用javafx，player v player进行棋盘游戏。我可以建造董事会，但我不能为我的生活找出从那里去的地方。我的具体问题是让这些东西移动。我看过HelloDragAndDrop，但没有任何帮助。我一直在寻找几个小时，找不到一个有用的起点。我绝不是要求有人为我完成代码，而是要开始我应该前进的方向，因为我只是输了。感谢。

我添加了一种拖放方法，可以检测到拖放，但实际上并没有移动检查器。有什么帮助吗？

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.*;
import javafx.scene.*;
import javafx.scene.control.Cell;
import javafx.scene.input.*;
import javafx.scene.layout.*;
import javafx.scene.paint.Color;
import javafx.scene.shape.*;
import javafx.stage.Stage;

public class CheckerboardSetUp extends Application{
private static final int BOARD_DIM = 8;
private static final int SQUARES = 64;
private static final int PIECES = 12;
private Cell[][] boardG = new Cell[8][8];
private Circle[] p1p = new Circle[12];
private Circle[] p2p = new Circle[12];
private GridPane board = new GridPane();

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

public void start(Stage primaryStage){
    buildBoard(board);
    putSquaresOnBoard(board);
    putPiecesOnBoard(board,p1p,p2p);
    intializeListeners();
    board.setPadding(new Insets(15,15,15,15));
    Scene scene = new Scene(board, 700, 700);
    primaryStage.setTitle("Checkers");
    primaryStage.setScene(scene);
    primaryStage.show();
}

private void intializeListeners() {
    for (int i = 0; i < PIECES; i++){
        p1p[i].setOnDragDetected(new EventHandler<MouseEvent>(){
            @Override
            public void handle(MouseEvent e){
                for(int i = 0; i < PIECES; i++){
                Dragboard db = p1p[i].startDragAndDrop(TransferMode.ANY);
                ClipboardContent content = new ClipboardContent();
                content.putString("Hello");
                db.setContent(content);
                System.out.println("setOnDragDetected");
            }}
        });
        board.setOnDragOver(new EventHandler<DragEvent>(){
            @Override
            public void handle(DragEvent e){
                e.acceptTransferModes(TransferMode.ANY);
                System.out.println("dragOverDetected");
            }
        });
        board.setOnDragDropped(new EventHandler<DragEvent>(){
            @Override
            public void handle(DragEvent e){
                e.acceptTransferModes(TransferMode.ANY);
                System.out.println("dropDetected");
            }
        });
    }

}

private void buildBoard(GridPane board){
    for(int i = 0; i < BOARD_DIM; i++){
    RowConstraints rc = new RowConstraints();
    rc.setMinHeight(SQUARES);
    rc.setMaxHeight(SQUARES);
    rc.setPrefHeight(SQUARES);
    rc.setValignment(VPos.CENTER);
    board.getRowConstraints().add(rc);

    ColumnConstraints cc = new ColumnConstraints();
    cc.setMinWidth(SQUARES);
    cc.setMaxWidth(SQUARES);
    cc.setPrefWidth(SQUARES);
    cc.setHalignment(HPos.CENTER);
    board.getColumnConstraints().add(cc);
    }
}
private void putSquaresOnBoard(GridPane board) {
    Color[] sqColors = new Color[]{Color.RED, Color.BLACK};
    for (int i = 0; i < BOARD_DIM; i ++){
        for (int j = 0; j < BOARD_DIM; j++){
            board.add(new Rectangle(SQUARES,SQUARES,sqColors[(i+j)%2]),i,j);
        }
    }
}   

private void putPiecesOnBoard(GridPane board, Circle[] p1p, Circle[] p2p) {
    for (int i = 0; i < PIECES; i++){
        p1p[i] = new Circle(SQUARES/2-4, Color.AZURE);
        p1p[i].setStroke(Color.CORAL);
        board.add(p1p[i], i % (BOARD_DIM / 2) * 2 + (2 * i / BOARD_DIM) % 2, 
                BOARD_DIM - 1 - (i * 2) / BOARD_DIM);

        p2p[i] = new Circle(SQUARES/2-4, Color.CORAL);
        p2p[i].setStroke(Color.AZURE);
        board.add(p2p[i], i % (BOARD_DIM / 2) * 2 + (1 + 2 * i / BOARD_DIM) % 2, 
                (i * 2) / BOARD_DIM);
    }
}

}