message: examples/aditof-demo/aditofdemoview.cpp: enable the input of all letters
diff: namespace detail {
  std::string getKeyPressed(int key, bool &backspace) {
  - switch (key & 0xff) {
  - case 46:
  - return ".";
  - case 48:
  - return "0";
  - case 49:
  - return "1";
  - case 50:
  - return "2";
  - case 51:
  - return "3";
  - case 52:
  - return "4";
  - case 53:
  - return "5";
  - case 54:
  - return "6";
  - case 55:
  - return "7";
  - case 56:
  - return "8";
  - case 57:
  - return "9";
  - case 97:
  - return "a";
  - case 98:
  - return "b";
  - case 99:
  - return "c";
  - case 100:
  - return "d";
  - case 101:
  - return "e";
  - case 102:
  - return "f";
  - case 8:
  + key = key & 0xff;
  + if (key < 128) {
  + if (key == 8) {
  backspace = true;
  return "";
  -
  - default:
  - return "";
  }
  + char c = key;
  + std::string val(&c, sizeof(char));
  + return val;
  + } else
  + return "";
  }
  uint16_t fromHexToUint(const std::string &hexValue) {
  