Accord.Controls.HuePicker.HSLPicker_MouseMove C# (CSharp) Method

        private void HSLPicker_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            Cursor cursor = Cursors.Default;

            if (trackMode != 0)
            {
                cursor = Cursors.Hand;

                int dy = e.Y - ptCenter.Y;
                int dx = e.X - ptCenter.X;

                if (trackMode == 1)
                {
                    // MIN pointer tracking
                    min = (int)(System.Math.Atan2(-dy, dx) * 180 / System.Math.PI);
                    if (min < 0)
                    {
                        min = 360 + min;
                    }
                }
                else
                {
                    // MAX pointer tracking
                    max = (int)(System.Math.Atan2(-dy, dx) * 180 / System.Math.PI);
                    if (max < 0)
                    {
                        max = 360 + max;
                    }
                }

                // repaint control
                Invalidate();
            }
            else
            {
                // check coordinates of MIN pointer
                if ((e.X >= ptMin.X - 4) && (e.Y >= ptMin.Y - 4) &&
                     (e.X < ptMin.X + 4) && (e.Y < ptMin.Y + 4))
                {
                    cursor = Cursors.Hand;
                }
                if (type == HuePickerType.Range)
                {
                    // check coordinates of MAX pointer
                    if ((e.X >= ptMax.X - 4) && (e.Y >= ptMax.Y - 4) &&
                         (e.X < ptMax.X + 4) && (e.Y < ptMax.Y + 4))
                    {
                        cursor = Cursors.Hand;
                    }
                }

            }

            this.Cursor = cursor;
        }
    }