java - 删除失败时 Actor 会迷路 -libgdx

Question

我正在开发一款 rummikub 游戏，我有一个棋盘，上面有方 block ，并且方 block 上的所有位置都定义为 TileActor。有些瓷砖 Actor 上面有实际的瓷砖，有些是空的。问题是:当我将一个图 block 拖放到一个空的 TileActor 上时，它工作正常，但是当我将它放到空白处时， Actor 就会迷路。如何防止 Actor 迷路？

这是我的拖放代码:

dragAndDrop.addSource(new Source(actor) {   
        @Override
        public Payload dragStart(InputEvent event, float x, float y, int pointer) {
            Payload payload = new Payload();
            payload.setObject("Some payload!");
            payload.setDragActor(getActor());

            Label validLabel = new Label("Valid move!", skin);
            validLabel.setColor(0, 1, 0, 1);
            payload.setValidDragActor(validLabel);

            Label invalidLabel = new Label("Invalid!", skin);
            invalidLabel.setColor(1, 0, 0, 1);
            payload.setInvalidDragActor(invalidLabel);


            return payload;
        }

    dragAndDrop.addTarget(new Target(actor) {
                public boolean drag (Source source, Payload payload, float x, float y, int pointer) {
                    getActor().setColor(Color.GREEN);
                    return true;
                }

                public void reset (Source source, Payload payload) {
                    getActor().setColor(Color.WHITE);
                }

                public void drop (Source source, Payload payload, float x, float y, int pointer) {

                    int movingTile =((TileActor)source.getActor()).getPosition();
                    if(movingTile!=-1){
                int newPosition=player.moveTileOnBoard(movingTile, ((TileActor)getActor()).getPosition());

                    }
                }
            });

Answer 1

问题是您向 Payload 提供了自己的 Actor(因此 DragAndDrop 需要注意删除这个 actor):

payload.setDragActor(getActor());

尝试创建 Actor 的副本:

Actor newActor = /* clone your actor from getActor() to newActor */;
payload.setDragActor(newActor);