小数转换不允许Inkwell对整个按钮-Flutter / dart

Question

我一直试图在容器顶部的堆栈中设置一个墨水池，但是，墨水瓶按钮对父容器边界线以下的另一半不响应。的代码是：

new Stack(
alignment: AlignmentDirectional.bottomCenter,
children: <Widget>[
           new Container(
           decoration: new BoxDecoration(
            color: Colors.white,
            borderRadius: new BorderRadius.circular(50.0),
            border: new Border.all(
            width: 6.0,
            color: Colors.amber,
             ),
            ),
            child: new Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: <Widget>[
                 new Padding(
                   padding: size.height > size.width ? new EdgeInsets.all(10.0) : new EdgeInsets.all(5.0),),
                   imagePathStore == null ? Center(
                   child: Container(
                   height: size.height > size.width ? size.height * 0.2 : size.height * 0.1,
                   width: size.height > size.width ? size.width * 0.2 : size.width * 0.1,
                   child: RaisedButton(
                   splashColor: Colors.amber,
                   color: Colors.white,
                   shape: CircleBorder(
                    side: BorderSide(
                     width: 3.0,
                     color: Colors.amber)),
                   onPressed: () => getImage(context),
                     child: new IconTheme(
                     data: IconThemeData(
                     size: size.height * 0.05,
                     color: Colors.amber),
                      child: Icon(Icons.add),
                     ),
                    ),
                   ),
                  )
                 : InkWell(
                 onTap: () => getImage(context),
                 child: new Container(
                  width: 130.0,
                  height: 130.0,
                  decoration: new BoxDecoration(
                    shape: BoxShape.circle,
                    image: new DecorationImage(
                      image: FileImage(File(imagePathStore)),
                      fit: BoxFit.fill,
                      ))),
                    ),
                    new Padding(
                     padding: size.height > size.width ? new EdgeInsets.all(size.height * 0.1) : new EdgeInsets.all(size.height * 0.08),
                     child: new TextField(
                      focusNode: _focusName,
                      autocorrect: false,
                      onSubmitted: _submit(userName),
                      onChanged: _onTyping,
                      controller: TextEditingController(text: userName),
                      decoration: new InputDecoration(
                        labelStyle: TextStyle(color: Colors.red),
                        isDense: true,
                        border: const OutlineInputBorder(
                          borderRadius: const BorderRadius.all(const Radius.circular(10.0)),
                          borderSide: const BorderSide(
                             style: BorderStyle.solid,
                             width: 100.0,
                             color: Colors.amber)),
                        hintText: Loca.of(context).writeYourName,
                     ),
                   ),
                 ),
               ],
             ),
           ),

           //Here is the button which is having problems
           FractionalTranslation(
             translation: Offset(0.0, 0.5),
             child: new InkWell(
               onTap: tabSreen,
               splashColor: Colors.green,
               child: new Shake(
               animation: shakeAnimation,
               child: new Container(
               // alignment: Alignment(0.0, 0.5),
                 decoration: BoxDecoration(
                 borderRadius: const BorderRadius.all(const Radius.circular(16.0)),
                 color: Colors.deepOrange,
                 ),
                height: 125.0,
                width: 100.0,
                child: new Icon(
                  Icons.keyboard_arrow_right,
                  color: Colors.white,
               ))),
             ))
           ],
         ),

下面的图像代表了我要解决的问题。墨水池位于所需的位置，但是由于分数平移，按钮的下半部分没有响应。我曾尝试使用RaisedButton，FlatButton，Material Button，但仍然存在相同的问题。