Flutter 长按控件在对应位置弹出 Menu 菜单 （含震动反馈）

GestureDetector(
  child: ,
  onLongPressStart: (details) {
    Feedback.forLongPress(this.context); // Add Feedback
    showMenu(
      context: context,
      position: RelativeRect.fromLTRB(
        details.globalPosition.dx,
        details.globalPosition.dy,
        details.globalPosition.dx,
        details.globalPosition.dy,
      ),
      items: <PopupMenuEntry>[
        PopupMenuItem(child: Text("删除")), // Menu Item
      ],
    );
  },
);

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