createTicker method

@override Ticker createTicker(TickerCallback onTick)

Creates a ticker with the given callback.

The kind of ticker provided depends on the kind of ticker provider.

Implementation

@override
Ticker createTicker(TickerCallback onTick) {
  if (_tickerModeNotifier == null) {
    // Setup TickerMode notifier before we vend the first ticker.
    _updateTickerModeNotifier();
  }
  assert(_tickerModeNotifier != null);
  _tickers ??= <_WidgetTicker>{};
  final _WidgetTicker result = _WidgetTicker(onTick, this,
      debugLabel: kDebugMode ? 'created by ${describeIdentity(this)}' : null)
    ..muted = !_tickerModeNotifier!.value;
  _tickers!.add(result);
  return result;
}