官方文档:https://docs.devexpress.com/VCL/175009/ExpressGaugeControl/concepts/gauge-control
对比 (11)frxGaugePanel1简单仪表盘控件，更 炫，但也更复杂
1]拖一个dxGaugeControl1控件到 设计 界面上
2]在dxGaugeControl1控件上右键，点击Edit Scales..
3]在弹出的Editor菜单上的dxGaugeControl1再右键，依次点击Add Scale->Circular
可以看到预览效果
4]可以修改Value，即可看到效果
5]添加 文本 标签
6]可以更改表盘样式StyleName
7]其他 仪表 盘
8]可以嵌套几个表盘在一起
Any scale contained within the ExpressGauge control can host one or more scales of any type, and allows you to create composite or nested scales. The Gauge Control imposes no technical limitations on the number of such scale nesting levels enabling you to create multi-functional measuring instruments and dashboards:
可以自定义文本和色彩域
In addition to the standard visual elements, each scale can contain multiple optional decorative elements, such as custom labels and colored range bars allowing you to resemble real measurement instruments better:
