AVCamBarcode.PreviewView.OnRunningChanged C# (CSharp) Метод

		void OnRunningChanged (NSObservedChange change)
		{
			var running = ((NSNumber)change.NewValue).BoolValue;
			if (!running)
				return;

			DispatchQueue.MainQueue.DispatchAsync (() => {
				// If the region of interest view's region of interest has not
				// been initialized yet, let's set an inital region of interest
				// that is 80% of the shortest side by 25% of the longest side
				// and centered in the root view.
				if (RegionOfInterest.IsEmpty) {
					var width = NMath.Min (Frame.Width, Frame.Height) * 0.8f;
					var height = NMath.Max (Frame.Width, Frame.Height) * 0.25f;

					var newRegionOfInterest = Frame.Inset (Frame.GetMidX () - width / 2, Frame.GetMidY () - height / 2);
					SetRegionOfInterestWithProposedRegionOfInterest (newRegionOfInterest);
				}

				if (running) {
					SetRegionOfInterestWithProposedRegionOfInterest (RegionOfInterest);
					RegionOfInterestDidChange?.Invoke (this, EventArgs.Empty);
				}
			});
		}