HarmonyOS SourceTool.xxx值为undefined

参考示例如下：

let fingerType: SourceTool = event.sourceTool;
// 这里获取到的是枚举的“Value”，是number类型的值; 无法和SourceTool.Unknown做等号判断;
// 可以通过以下代码查询到SourceTool 所有的枚举的key/Value
const enumKeys = Object.keys(SourceTool).filter(key => isNaN(Number(key)));
const enumValues = enumKeys.map(key => SourceTool[key as keyof object]);
console.log('Keys: ', enumKeys);
console.log('Values: ', enumValues);

// Keys: Unknown,FINGER,PEN,MOUSE,TOUCHPAD,JOYSTICK Values: 0,1,2,7,9,10 此时使用value去判断，所以修改代码如下
if (fingerType === 1) {
  console.log("dianju_手指_down")
} else if (fingerType == 2) {
  console.log("dianju_手写笔_down")
} else if (fingerType == 0) {
  console.log("dianju_未知物_down")
} else if (fingerType == 7) {
  console.log("dianju_鼠标_down")
} else if (fingerType == 9) {
  console.log("dianju_触摸板_down")
} else if (fingerType == 10) {
  console.log("dianju_操纵手柄_down")
}