addAllowedPointerPanZoom method Null safety
- PointerPanZoomStartEvent event
protected">@protected
Registers a new pointer pan/zoom that's been checked to be allowed by this gesture recognizer.
Subclasses of GestureRecognizer are supposed to override this method instead of addPointerPanZoom because addPointerPanZoom will be called for each pointer being added while addAllowedPointerPanZoom is only called for pointers that are allowed by this recognizer.
Implementation
@protected
void addAllowedPointerPanZoom(PointerPanZoomStartEvent event) { }