handleLongPressMoveUpdate method
Called when moving after the long press gesture by a primary button is recognized in behavior.
Implementation
@override
void handleLongPressMoveUpdate(LongPressMoveUpdateDetails details) {
if (parentBox == null || !enableSelectionZooming) {
return;
}
final Offset position = parentBox!.globalToLocal(details.globalPosition);
_doSelectionZooming(details, position.dx, position.dy);
parentBox!.markNeedsPaint();
}