Make DEL to be a special character.

examples/util/print_key_press.cpp

@@ -19,7 +19,11 @@ class DrawKey : public Component {
       for(auto& it : keys[i].input())
         code += L" " + std::to_wstring((unsigned int)it);
 
-      code = L"(" + code + L" ) -> " + keys[i].character() + L")";
+      code = L"(" + code + L" ) -> ";
+      if (keys[i].is_character())
+        code +=  keys[i].character();
+      else
+        code +=  L"(special)";
       children.push_back(text(code));
     }
     return vbox(std::move(children));

include/ftxui/component/event.hpp

@@ -49,7 +49,7 @@ struct Event {
  private:
   std::string input_;
   bool is_character_ = false;
-  wchar_t character_ = '?';
+  wchar_t character_ = U'?';
 };
 
 }  // namespace ftxui

src/ftxui/component/event.cpp

@@ -122,6 +122,9 @@ Event Event::GetEvent(std::function<char()> getchar) {
   if (input[0] >= 0 && input[0] < 32)  // C0
     return Event::Special(input);
 
+  if (input[0] == 127) // Delete
+    return Event::Special(input);
+
   return ParseUTF8(getchar, input);
 }