I have a timer setup like this. I want the Timer to be reset and reinitialized with the new timevalue as and when changingTimeValue changes. What are the ways in which I can do this ?
snakeUpdateTimer = Timer.periodic( changingTimeValue , (timer){
snakeBloc.add(SnakeMoveEvent()) ;
});
Timer snakeUpdateTimer;
...
set changingTimeValue(Duration duration) {
snakeUpdateTimer?.cancel();
snakeUpdateTimer = Timer(
duration,
() => snakeBloc.add(SnakeMoveEvent()),
);
}
...
RaisedButton(
child: Text("Click to reset Timer"),
onPressed: (){
changingTimeValue= Duration(seconds: 3);
},
)
When you assign Duration to changingTimeValue, it will cancel the old timer and creates new one.
If you also want to periodically reset the timer after timeout, then use
set changingTimeValue(Duration duration) {
snakeUpdateTimer?.cancel();
snakeUpdateTimer = Timer.periodic(
duration,
(timer) => snakeBloc.add(SnakeMoveEvent()),
//timer contains number of cycles finished(timer.tick)
);
}
Timer.periodic constructor or Timer constructor. Timer.periodic is initialized once with the duration and it invokes the callback on the intervals that is provided as duration. Whereas Timer constructor creates a timer that ticks only once. Based on your requirement you can used any of these.
Following is the code that allows you to change the time of the timer:
Timer _timer; // global variable.
void updateTimerDuration(Duration changingTimeValue) {
if (_timer != null && _timer.isActive) _timer.cancel();
// if you want timer to tick only once.
_timer = Timer(changingTimeValue, () {
snakeBloc.add(SnakeMoveEvent());
});
// if you want timer to tick at fixed duration.
_timer = Timer.periodic(changingTimeValue, (timer) {
snakeBloc.add(SnakeMoveEvent());
});
}
I hope it helps, in case of any doubts please comment.
