Flutter 如何在颤振中增加抽屉阻力区宽度？

我的颤振应用程序中有一个抽屉，但是默认的抽屉有一个非常小的拖动区域来显示它。我怎样才能增加呢

  @override
  Widget build(BuildContext context) {
    Size size = MediaQuery.of(context).size;
    return Scaffold(
        drawerDragStartBehavior: DragStartBehavior.down,
        drawer: Drawer(
        child: Column(
          children: <Widget>[
            UserAccountsDrawerHeader(
              accountName: Text(
                fullName ?? "",
                style: TextStyle(
                  color: Colors.white,
                  letterSpacing: 1.0,
                  fontSize: 16.0,
                ),
              ),

您只需使用Scaffold的drawerEdgeDragWidth属性即可：

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但这里你要设置抽屉的宽度。我需要改变拖动区域的宽度来显示抽屉。你能告诉我你到底想要什么吗？把抽屉的拖动宽度调大一点。我想打开抽屉，从左到右在屏幕上的中间，但不只是在左拐角。

 drawer: SizedBox(
        width: MediaQuery.of(context).size.width/1.2,
        child: Drawer(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: <Widget>[
              Column(
                mainAxisSize: MainAxisSize.min,
                children: <Widget>[
                  SizedBox(
                    height: 10,
                  ),
                  ListTile(
                    dense: true,
                    title: Text(
                      "Apply for Leave",
                      style: drawerFont,
                    ),
                    onTap: () {
                      Navigator.pop(context);
                      Navigator.push(
                          context,
                          MaterialPageRoute(
                              builder: (context) => ApplyLeave()));
                    },
                  ),
                  ListTile(
                    dense: true,
                    title: Text(
                      "Approval for Bills",
                      style: drawerFont,
                    ),
                    onTap: () {
                      Navigator.pop(context);
                      Navigator.push(
                          context,
                          MaterialPageRoute(
                              builder: (context) => ApplyBill()));
                    },
                  )
                ],
              ),
              Column(
                crossAxisAlignment: CrossAxisAlignment.end,
                mainAxisAlignment: MainAxisAlignment.end,
                children: <Widget>[
                  Container(
                    color: Colors.grey[200],
                    width: double.infinity,
                    height: 60,
                    child: Padding(
                      padding: const EdgeInsets.only(
                          left: 28.0, top: 15, bottom: 15),
                      child: GestureDetector(
                        onTap: () {
                          Navigator.pop(context);
                          Navigator.push(
                              context,
                              MaterialPageRoute(
                                  builder: (context) => ContactUs()));
                        },
                        child: Text(
                          "Contact Us",
                          style: drawerFont,
                        ),
                      ),
                    ),
                  ),
                ],
              )
            ],
          ),
        ),
      ),

return Scaffold(
  appBar: MyAppBar(),
  drawer: MyDrawer(),
  // Put the width you want here
  // In this case the drag area fills the whole screen
  drawerEdgeDragWidth: MediaQuery.of(context).size.width,
  body: MyBody(),
);