Parent: $root.$constants
| kBack | Backspace key pressed |
| kClear | Clear key pressed |
| kContext | Context key pressed (Windows only) |
| kDown | Down arrow key pressed |
| kEnd | End key pressed |
| kEnter | Enter key pressed |
| kEscape | Escape key pressed |
| kFwdDel | Forward delete key pressed |
| kHome | Home key pressed |
| kInsert | Insert key pressed |
| kLeft | Left arrow key pressed |
| kPDown | Page down key pressed |
| kPLeft | Page left key pressed |
| kPRight | Page right key pressed |
| kPUp | Page up key pressed |
| kReturn | Return key pressed |
| kRight | Right arrow key pressed |
| kTabKey | Tab key pressed |
| kUp | Up arrow key pressed |