createRecognizer method Null safety

  1. @override
DelayedMultiDragGestureRecognizer createRecognizer(
  1. GestureMultiDragStartCallback onStart
)
override

Creates a gesture recognizer that recognizes the start of the drag.

Subclasses can override this function to customize when they start recognizing a drag.

Implementation

@override
DelayedMultiDragGestureRecognizer createRecognizer(GestureMultiDragStartCallback onStart) {
  return DelayedMultiDragGestureRecognizer(delay: delay)
    ..onStart = (Offset position) {
      final Drag? result = onStart(position);
      if (result != null && hapticFeedbackOnStart) {
        HapticFeedback.selectionClick();
      }
      return result;
    };
}