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) {
  assert(() {
    if (_ticker == null) return true;
    throw FlutterError.fromParts(
      <DiagnosticsNode>[
        ErrorSummary(
          '$runtimeType is a SingleTickerProviderWidgetModelMixin but multiple tickers were created.',
        ),
        ErrorDescription(
          'A SingleTickerProviderWidgetModelMixin can only be used as a TickerProvider once.',
        ),
        ErrorHint(
          'If a WidgetModel is used for multiple AnimationController objects, or if it is passed to other '
          'objects and those objects might use it more than one time in total, then instead of '
          'mixing in a SingleTickerProviderWidgetModelMixin, implement your own TickerProviderWidgetModelMixin.',
        ),
      ],
    );
  }());
  _ticker =
      Ticker(onTick, debugLabel: kDebugMode ? 'created by $this' : null);
  return _ticker!;
}