ARCed.Controls.MapSourceSelectorPanel.PictureBoxTilesetMouseDown C# (CSharp) Метод

        private void PictureBoxTilesetMouseDown(object sender, MouseEventArgs e)
        {
            _mouseDown = true;
            ResetPoints();
            if (_originPoint.X < 0 && _originPoint.Y < 0)
            {
                _originPoint.X = _endPoint.X = e.X;
                _originPoint.Y = _endPoint.Y = e.Y;
                _selectionActive = true;
                RefreshSelection();
            }
        }