addListener method
Calls the listener every time the user presses or releases a key.
Listeners can be removed with removeListener.
Implementation
void addListener(ValueChanged<RawKeyEvent> listener) {
_listeners.add(listener);
}Calls the listener every time the user presses or releases a key.
Listeners can be removed with removeListener.
void addListener(ValueChanged<RawKeyEvent> listener) {
_listeners.add(listener);
}