MissionPlanner.GridUI.map_MouseUp C# (CSharp) Method

        private void map_MouseUp(object sender, MouseEventArgs e)
        {
            MouseDownEnd = map.FromLocalToLatLng(e.X, e.Y);

            // Console.WriteLine("MainMap MU");

            if (e.Button == MouseButtons.Right) // ignore right clicks
            {
                return;
            }

            if (isMouseDown) // mouse down on some other object and dragged to here.
            {
                if (e.Button == MouseButtons.Left)
                {
                    isMouseDown = false;
                }
                if (!isMouseDraging)
                {
                    if (CurrentGMapMarker != null)
                    {
                        // Redraw polygon
                        //AddDrawPolygon();
                    }
                }
            }
            isMouseDraging = false;
            CurrentGMapMarker = null;
            CurrentGMapMarkerIndex = 0;
            CurrentGMapMarkerStartPos = null;
        }