如何将 Stepper 小部件的背景颜色更改为透明色？

Question

步进器小部件的背景颜色在垂直类型时是透明的。当像 StepperType.horizo​​ntal 这样更改类型时，步进器具有白灰色背景颜色。我怎样才能改变水平轴的背景颜色？

这是我的示例代码：

Container(
   width: _width,
   child: Stepper(
      type: StepperType.horizontal,
      steps: [
        Step(
          title: Text("First"),
          content: Text("This is our first example."),
        ),
        Step(
          title: Text("Second"),
          content: Text("This is our second example."),
        ),
      ],
    ),
  ),

Answer 1

要更改步进器小部件的背景颜色，请将其包装到主题中并在画布颜色中为其指定颜色。

Container(
        width: _width,
        child: Theme(
          data: ThemeData(canvasColor: Colors.lightBlue),
          child: Stepper(
            type: StepperType.horizontal,
            steps: [
              Step(
                title: Text("First"),
                content: Text("This is our first example."),
              ),
              Step(
                title: Text("Second"),
                content: Text("This is our second example."),
              ),
            ],
          ),
        ),
      ),