OSX -NSTextField to show Command Key, Control Key, Shift Key, Alt Key symbol to show/edit shortcuts

I am working on an app which records shortcut for my app's functionality.

Currently, I am defining the shortcut through my code explicitly using DDHotKey.

Now I want to give user a control to define it by themselves and also want to reflect their changes in the text field along with the symbols for Modifier keys.

I want to achieve it using DDHotKey as it is working perfectly in the current version.