start method
void
start()
Starts the countdown.
Implementation
void start() {
_timer = Timer.periodic(Duration(seconds: secondsToSubtract), (timer) {
if (_currentSecondsToSubtract == 0) {
return;
}
int seconds = _currentDuration.inSeconds - _currentSecondsToSubtract;
if (seconds <= 0) {
cancel();
for (CountdownListener listener in listeners) {
listener.onTick(Duration.zero);
}
return;
}
_currentDuration = Duration(seconds: seconds);
for (CountdownListener listener in listeners) {
listener.onTick(_currentDuration);
}
});
for (CountdownListener listener in listeners) {
listener.onStarted();
}
}