iSpyApplication.MainForm.CameraControlMouseWheel C# (CSharp) Method

        private static void CameraControlMouseWheel(object sender, MouseEventArgs e)
        {
            var cameraControl = (CameraWindow)sender;

            cameraControl.PTZNavigate = false;
            if (cameraControl.PTZ != null)
            {

                if (!cameraControl.PTZ.DigitalZoom)
                {
                    cameraControl.Calibrating = true;
                    cameraControl.PTZ.SendPTZCommand(e.Delta > 0 ? Enums.PtzCommand.ZoomIn : Enums.PtzCommand.ZoomOut);
                    if (cameraControl.PTZ.IsContinuous)
                        cameraControl.PTZ.SendPTZCommand(Enums.PtzCommand.Stop);
                }
                else
                {
                    Rectangle r = cameraControl.Camera.ViewRectangle;
                    //map location to point in the view rectangle
                    var ox =
                        Convert.ToInt32((Convert.ToDouble(e.Location.X) / Convert.ToDouble(cameraControl.Width)) *
                                        Convert.ToDouble(r.Width));
                    var oy =
                        Convert.ToInt32((Convert.ToDouble(e.Location.Y) / Convert.ToDouble(cameraControl.Height)) *
                                        Convert.ToDouble(r.Height));

                    cameraControl.Camera.ZPoint = new Point(r.Left + ox, r.Top + oy);
                    var f = cameraControl.Camera.ZFactor;
                    if (e.Delta > 0)
                    {
                        f += 0.2f;
                    }
                    else
                        f -= 0.2f;
                    if (f < 1)
                        f = 1;
                    cameraControl.Camera.ZFactor = f;
                }
                ((HandledMouseEventArgs)e).Handled = true;

            }
        }