cancel method

  1. @override
void cancel ()
override

Called when the user input that triggered this feature's appearance was canceled.

Typically causes the ink to gradually disappear. By default this method does nothing.

Implementation 

@override
void cancel() {
  _fadeInController.stop();
  // Watch out: setting _fadeOutController's value to 1.0 will
  // trigger a call to _handleAlphaStatusChanged() which will
  // dispose _fadeOutController.
  final double fadeOutValue = 1.0 - _fadeInController.value;
  _fadeOutController.value = fadeOutValue;
  if (fadeOutValue < 1.0)
    _fadeOutController.animateTo(1.0, duration: _kCancelDuration);
}