Accord.Controls.Histogram.Histogram_MouseMove C# (CSharp) Метод

        private void Histogram_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            if ((allowSelection) && (values != null))
            {
                int x = 1;
                int y = 1;

                if (!tracking)
                {
                    if ((e.X >= x) && (e.Y >= y) && (e.X < x + width) && (e.Y < y + height))
                    {
                        over = true;

                        // moving over
                        this.Cursor = Cursors.Cross;

                        // notify parent
                        if (PositionChanged != null)
                        {
                            PositionChanged(this, new HistogramEventArgs(
                                (vertical) ? (e.Y - y) : (e.X - x)));
                        }
                    }
                    else
                    {
                        this.Cursor = Cursors.Default;

                        if (over)
                        {
                            over = false;

                            // notify parent
                            if (PositionChanged != null)
                                PositionChanged(this, new HistogramEventArgs(-1));
                        }
                    }
                }
                else
                {
                    // selecting region
                    stop = (vertical) ? (e.Y - y) : (e.X - x);

                    stop = Math.Min(stop, ((vertical) ? height : width) - 1);
                    stop = Math.Max(stop, 0);

                    Invalidate();

                    // notify parent
                    if (SelectionChanged != null)
                        SelectionChanged(this, new HistogramEventArgs(Math.Min(start, stop), Math.Max(start, stop)));
                }
            }
        }