Emitted when a key event is received.
Implement the member function IBusEngineClass::process_key_event in extended class to receive this signal. Both the key symbol and keycode are passed to the member function. See process_key_event for further explanation of key symbol, keycode and which to use.
| keyval |
Key symbol of the key press. |
| keycode |
KeyCode of the key press. |
| state |
Key modifier flags. |