如何在 flutter 中为 Sfslider trackShape 提供填充？

Question

正如你在这张照片中看到的 正如您在图片中看到的那样，分隔线连接到轨道形状的角上，我希望它们稍微分开和留出空间。 我的代码是：

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          SfSliderTheme(
            data: SfSliderThemeData(
              tickOffset: const Offset(0, 0),
              activeTrackHeight: 15,
              inactiveTrackHeight: 15,
              thumbRadius: 8,

              activeTrackColor: Colors.pink,
              inactiveTrackColor: Colors.red.withOpacity(0.3),
         
              activeDividerColor: Colors.white,
              inactiveDividerColor: Colors.white,

              thumbColor: const Color(0xff39b5ed),
     
              tooltipBackgroundColor: const Color(0xff39b5ed),
              tooltipTextStyle: const TextStyle(color: Colors.black),
              // overlayColor: Colors.pink.withOpacity(0.0),
              activeDividerRadius: 3.5,

              inactiveDividerRadius: 3.5,
            ),
            child: SfSlider(
       
              tooltipShape: const SfRectangularTooltipShape(),
              min: 1.0,
              max: 5.0,
              value: _value,
              interval: 1,
              showDividers: true,
              // showTicks: true,
              showLabels: true,
              shouldAlwaysShowTooltip: true,
              onChanged: (value) {
                setState(() {
                  _value = value;
                });
              },
            ),
          ),
        ],
      ),
    );
  }
}

我到处找，一无所获